entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://stackoverflow.com/questions/21865621/transparent-status-bar-before-android-4-4-kitkat|1|https://github.com/jgilfelt/SystemBarTint|2|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/actteam/9c19cdda09ef3d907a5c2904f35e5339.jpg|imageAlt|blocks|key|em1mo|text|你所需要做的就是在你的主题中设置这些属性：|unstyled|depth|inlineStyleRanges|entityRanges|f4kag|true
true|code-block|syntax|javascript|aeoff|您希望具有透明状态栏的活动/容器布局需要此属性设置：|7i3gs|android:fitsSystemWindows="true"|9rtn3|通常不可能在pre-kitkat上确定执行此操作，看起来您可以做到这一点|6um1v|但是一些奇怪的代码让它变得如此..。|offset|length|1m111|编辑:我推荐这个库：|61ep8|https://github.com/jgilfelt/SystemBarTint用于很多前棒棒糖状态栏的颜色控制。|e4r6h|经过深思熟虑后，我了解到，要完全禁用棒棒糖的半透明或状态栏和导航栏上的任何颜色，答案是在窗口上设置此标志：|8vfag|//+In+Activity's+onCreate()+for+instance
if+(Build.VERSION.SDK_INT+>=+Build.VERSION_CODES.KITKAT)+{
++++Window+w+=+getWindow();
++++w.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,+WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
}|c8fno|没有其他的主题是必要的，它会产生类似这样的结果：|2reef|fp94n|?|atomic|7nrlp|fkp5s|​^0|0|0|0|0|0|0|F|0|0|0|0|15|1|0|0|0|0|0|0|1|2|0|0^^$0|$1|$2|3|4|5|6|$7|8]]|9|$2|3|4|5|6|$7|A]]|B|$2|C|4|D|6|$E|F|G|-4]]]|H|@$I|J|K|L|2|M|N|1M|O|@]|P|@]|6|$]]|$I|Q|K|R|2|S|N|1N|O|@]|P|@]|6|$T|U]]|$I|V|K|W|2|M|N|1O|O|@]|P|@]|6|$]]|$I|X|K|Y|2|S|N|1P|O|@]|P|@]|6|$T|U]]|$I|Z|K|10|2|M|N|1Q|O|@]|P|@]|6|$]]|$I|11|K|12|2|M|N|1R|O|@]|P|@$13|1S|14|1T|I|1U]]|6|$]]|$I|15|K|16|2|M|N|1V|O|@]|P|@]|6|$]]|$I|17|K|18|2|M|N|1W|O|@]|P|@$13|1X|14|1Y|I|1Z]]|6|$]]|$I|19|K|1A|2|M|N|20|O|@]|P|@]|6|$]]|$I|1B|K|1C|2|S|N|21|O|@]|P|@]|6|$T|U]]|$I|1D|K|1E|2|M|N|22|O|@]|P|@]|6|$]]|$I|1F|K|-4|2|M|N|23|O|@]|P|@]|6|$]]|$I|1G|K|1H|2|1I|N|24|O|@]|P|@$13|25|14|26|I|27]]|6|$]]|$I|1J|K|-4|2|M|N|28|O|@]|P|@]|6|$]]|$I|1K|K|1L|2|M|N|29|O|@]|P|@]|6|$]]]]

All you need to do is set these properties in your theme:

<pre><code>&lt;item name="android:windowTranslucentStatus"&gt;true&lt;/item&gt;
&lt;item name="android:windowTranslucentNavigation"&gt;true&lt;/item&gt;
</code></pre>

Your activity / container layout you wish to have a transparent status bar needs this property set:

<pre><code>android:fitsSystemWindows="true"
</code></pre>

It is generally not possible to perform this for sure on pre-kitkat, looks like you can do it <a href="https://stackoverflow.com/questions/21865621/transparent-status-bar-before-4-4-kitkat">but some strange code makes it so</a>.

EDIT: I would recommend this lib: <a href="https://github.com/jgilfelt/SystemBarTint" rel="noreferrer">https://github.com/jgilfelt/SystemBarTint</a> for lots of pre-lollipop status bar color control.

Well after much deliberation I've learned that the answer to totally disabling the translucency or any color placed on the status bar and navigation bar for lollipop is to set this flag on the window:

<pre><code>// In Activity's onCreate() for instance
if (Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.KITKAT) {
 Window w = getWindow();
 w.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
}
</code></pre>

No other theme-ing is necessary, it produces something like this:

<img src="https://i.stack.imgur.com/hXS1p.jpg" alt="enter image description here">

entityMap|blocks|key|4egrh|text|在XML中使用以下代码，您将能够在活动中看到时间栏：|type|unstyled|depth|inlineStyleRanges|entityRanges|data^0^^$0|$]|1|@$2|3|4|5|6|7|8|C|9|@]|A|@]|B|$]]]]

Using this code in your XML, you will be able to see time bar in your activity:

<pre><code>&lt;android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:fitsSystemWindows="true"&gt;
</code></pre>

entityMap|blocks|key|7eu1o|text|android:fitsSystemWindows="true"仅适用于v21。我们可以在主题xml或父布局中设置它LinearLayout或在CoordinateLayout..。对于下面的v21，我们无法添加此标志。请使用不同的值创建不同的值文件夹style.xml文件根据您的需要。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data^0|0|W|1M|C|20|G|3I|9^^$0|$]|1|@$2|3|4|5|6|7|8|G|9|@$A|H|B|I|C|D]|$A|J|B|K|C|D]|$A|L|B|M|C|D]|$A|N|B|O|C|D]]|E|@]|F|$]]]]

<code>android:fitsSystemWindows="true"</code> only work on v21. We can set it in theme xml or in parent layout like <code>LinearLayout</code> or in <code>CoordinateLayout</code> . 
For below v21, We could not add this flag.
Please create different values folder with different <code>style.xml</code> file as per your need.

entityMap|blocks|key|1j3hj|text|使用android:fitsSystemWindows="false"在顶部布局中|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data^0|2|X^^$0|$]|1|@$2|3|4|5|6|7|8|G|9|@$A|H|B|I|C|D]]|E|@]|F|$]]]]

Use <code>android:fitsSystemWindows="false"</code> in your top layout

entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://github.com/laobie/StatusBarUtil|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/actteam/3833b1d690b315c3d176799eb1f801ee.png|imageAlt|blocks|key|73k2b|text|您可以使用外部库StatusBarUtil|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|cas02|添加到模块级别build.gradle:|style|CODE|41ier|compile+'com.jaeger.statusbarutil:library:1.4.0'|code-block|syntax|javascript|8h9cl|然后，您可以对活动使用以下util，以使状态栏透明：|8n0rp|StatusBarUtil.setTransparent(Activity+activity)|a53rf|示例：|cma2c|​|5gbjk|e25l3|?|atomic|6059a|dcvtq^0|8|D|0|0|7|C|0|0|0|0|0|0|0|0|1|1|0|0^^$0|$1|$2|3|4|5|6|$7|8]]|9|$2|A|4|B|6|$C|D|E|-4]]]|F|@$G|H|I|J|2|K|L|1D|M|@]|N|@$O|1E|P|1F|G|1G]]|6|$]]|$G|Q|I|R|2|K|L|1H|M|@$O|1I|P|1J|S|T]]|N|@]|6|$]]|$G|U|I|V|2|W|L|1K|M|@]|N|@]|6|$X|Y]]|$G|Z|I|10|2|K|L|1L|M|@]|N|@]|6|$]]|$G|11|I|12|2|W|L|1M|M|@]|N|@]|6|$X|Y]]|$G|13|I|14|2|K|L|1N|M|@]|N|@]|6|$]]|$G|15|I|16|2|K|L|1O|M|@]|N|@]|6|$]]|$G|17|I|-4|2|K|L|1P|M|@]|N|@]|6|$]]|$G|18|I|19|2|1A|L|1Q|M|@]|N|@$O|1R|P|1S|G|1T]]|6|$]]|$G|1B|I|-4|2|K|L|1U|M|@]|N|@]|6|$]]|$G|1C|I|16|2|K|L|1V|M|@]|N|@]|6|$]]]]

You can use the external library <a href="https://github.com/laobie/StatusBarUtil" rel="noreferrer">StatusBarUtil</a>:

Add to your module level <code>build.gradle</code>:

<pre><code>compile 'com.jaeger.statusbarutil:library:1.4.0'
</code></pre>

Then you can use the following util for an Activity to make the status bar transparent:

<pre><code>StatusBarUtil.setTransparent(Activity activity)
</code></pre>

Example:

<a href="https://i.stack.imgur.com/Q2KWk.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Q2KWk.png" alt="transparent status bar on Lollipop and KitKat"></a>

entityMap|blocks|key|189mt|text|@android:color/transparent|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|gk8h|不要使用windowLightStatusBar改为使用statusBarColor+=+@android:color/transparent|unstyled|offset|length|style|CODE|6qbhd^0|0|4|K|S|17|0^^$0|$]|1|@$2|3|4|5|6|7|8|M|9|@]|A|@]|B|$C|D]]|$2|E|4|F|6|G|8|N|9|@$H|O|I|P|J|K]|$H|Q|I|R|J|K]]|A|@]|B|$]]|$2|L|4|-4|6|G|8|S|9|@]|A|@]|B|$]]]]

<pre><code> &lt;item name="android:statusBarColor" tools:targetApi="lollipop"&gt;@android:color/transparent&lt;/item&gt;
 &lt;!--&lt;item name="android:windowLightStatusBar" tools:targetApi="m"&gt;true&lt;/item&gt;--&gt;
</code></pre>

Dont use <code>windowLightStatusBar</code> use instead <code>statusBarColor = @android:color/transparent</code>

entityMap|0|type|IMAGE|mutability|IMMUTABLE|data|imageUrl|https://ask.qcloudimg.com/http-save/actteam/b05c1b73a50421f5782d91ba530fedd9.png|imageAlt|blocks|key|c0i6o|text|要在statusbar下绘制布局，请执行以下操作：|unstyled|depth|inlineStyleRanges|entityRanges|17njj|values/styles.xml|c54l2|true|code-block|syntax|javascript|7bdqp|值-v21/styles.xml|esksl|true
@color/colorPrimaryDark|dmqba|使用已经处理fitsSystemWindows参数的CoordinatorLayout/DrawerLayout，或者创建自己的布局，如下所示：|d3cf|public+class+FitsSystemWindowConstraintLayout+extends+ConstraintLayout+{

++++private+Drawable+mStatusBarBackground;
++++private+boolean+mDrawStatusBarBackground;

++++private+WindowInsetsCompat+mLastInsets;

++++private+Map+childsMargins+=+new+HashMap<>();

++++public+FitsSystemWindowConstraintLayout(Context+context)+{
++++++++this(context,+null);
++++}

++++public+FitsSystemWindowConstraintLayout(Context+context,+AttributeSet+attrs)+{
++++++++this(context,+attrs,+0);
++++}

++++public+FitsSystemWindowConstraintLayout(Context+context,+AttributeSet+attrs,+int+defStyleAttr)+{
++++++++super(context,+attrs,+defStyleAttr);

++++++++if+(ViewCompat.getFitsSystemWindows(this))+{
++++++++++++ViewCompat.setOnApplyWindowInsetsListener(this,+new+android.support.v4.view.OnApplyWindowInsetsListener()+{
++++++++++++++++@Override
++++++++++++++++public+WindowInsetsCompat+onApplyWindowInsets(View+view,+WindowInsetsCompat+insets)+{
++++++++++++++++++++FitsSystemWindowConstraintLayout+layout+=+(FitsSystemWindowConstraintLayout)+view;
++++++++++++++++++++layout.setChildInsets(insets,+insets.getSystemWindowInsetTop()+>+0);
++++++++++++++++++++return+insets.consumeSystemWindowInsets();
++++++++++++++++}
++++++++++++});
++++++++++++setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
++++++++++++++++++++%7C+View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
++++++++++++TypedArray+typedArray+=+context.obtainStyledAttributes(new+int[]{android.R.attr.colorPrimaryDark});
++++++++++++try+{
++++++++++++++++mStatusBarBackground+=+typedArray.getDrawable(0);
++++++++++++}+finally+{
++++++++++++++++typedArray.recycle();
++++++++++++}
++++++++}+else+{
++++++++++++mStatusBarBackground+=+null;
++++++++}
++++}

++++public+void+setChildInsets(WindowInsetsCompat+insets,+boolean+draw)+{
++++++++mLastInsets+=+insets;
++++++++mDrawStatusBarBackground+=+draw;
++++++++setWillNotDraw(!draw+&&+getBackground()+==+null);

++++++++for+(int+i+=+0;+i+<+getChildCount();+i%2B%2B)+{
++++++++++++View+child+=+getChildAt(i);
++++++++++++if+(child.getVisibility()+!=+GONE)+{
++++++++++++++++if+(ViewCompat.getFitsSystemWindows(this))+{
++++++++++++++++++++ConstraintLayout.LayoutParams+layoutParams+=+(ConstraintLayout.LayoutParams)+child.getLayoutParams();

++++++++++++++++++++if+(ViewCompat.getFitsSystemWindows(child))+{
++++++++++++++++++++++++ViewCompat.dispatchApplyWindowInsets(child,+insets);
++++++++++++++++++++}+else+{
++++++++++++++++++++++++int[]+childMargins+=+childsMargins.get(child);
++++++++++++++++++++++++if+(childMargins+==+null)+{
++++++++++++++++++++++++++++childMargins+=+new+int[]{layoutParams.leftMargin,+layoutParams.topMargin,+layoutParams.rightMargin,+layoutParams.bottomMargin};
++++++++++++++++++++++++++++childsMargins.put(child,+childMargins);
++++++++++++++++++++++++}
++++++++++++++++++++++++if+(layoutParams.leftToLeft+==+LayoutParams.PARENT_ID)+{
++++++++++++++++++++++++++++layoutParams.leftMargin+=+childMargins[0]+%2B+insets.getSystemWindowInsetLeft();
++++++++++++++++++++++++}
++++++++++++++++++++++++if+(layoutParams.topToTop+==+LayoutParams.PARENT_ID)+{
++++++++++++++++++++++++++++layoutParams.topMargin+=+childMargins[1]+%2B+insets.getSystemWindowInsetTop();
++++++++++++++++++++++++}
++++++++++++++++++++++++if+(layoutParams.rightToRight+==+LayoutParams.PARENT_ID)+{
++++++++++++++++++++++++++++layoutParams.rightMargin+=+childMargins[2]+%2B+insets.getSystemWindowInsetRight();
++++++++++++++++++++++++}
++++++++++++++++++++++++if+(layoutParams.bottomToBottom+==+LayoutParams.PARENT_ID)+{
++++++++++++++++++++++++++++layoutParams.bottomMargin+=+childMargins[3]+%2B+insets.getSystemWindowInsetBottom();
++++++++++++++++++++++++}
++++++++++++++++++++}
++++++++++++++++}
++++++++++++}
++++++++}

++++++++requestLayout();
++++}

++++public+void+setStatusBarBackground(Drawable+bg)+{
++++++++mStatusBarBackground+=+bg;
++++++++invalidate();
++++}

++++public+Drawable+getStatusBarBackgroundDrawable()+{
++++++++return+mStatusBarBackground;
++++}

++++public+void+setStatusBarBackground(int+resId)+{
++++++++mStatusBarBackground+=+resId+!=+0+?+ContextCompat.getDrawable(getContext(),+resId)+:+null;
++++++++invalidate();
++++}

++++public+void+setStatusBarBackgroundColor(@ColorInt+int+color)+{
++++++++mStatusBarBackground+=+new+ColorDrawable(color);
++++++++invalidate();
++++}

++++@Override
++++public+void+onDraw(Canvas+canvas)+{
++++++++super.onDraw(canvas);
++++++++if+(mDrawStatusBarBackground+&&+mStatusBarBackground+!=+null)+{
++++++++++++int+inset+=+mLastInsets+!=+null+?+mLastInsets.getSystemWindowInsetTop()+:+0;
++++++++++++if+(inset+>+0)+{
++++++++++++++++mStatusBarBackground.setBounds(0,+0,+getWidth(),+inset);
++++++++++++++++mStatusBarBackground.draw(canvas);
++++++++++++}
++++++++}
++++}
}|2glvi|main_activity.xml|7qb3f|结果：|i249|截图：|1s3mc|2m7ko|?|atomic|offset|length|2dqr6|2cpg8|​^0|0|0|0|0|0|0|0|0|0|0|0|0|1|0|0|0^^$0|$1|$2|3|4|5|6|$7|8|9|-4]]]|A|@$B|C|D|E|2|F|G|1D|H|@]|I|@]|6|$]]|$B|J|D|K|2|F|G|1E|H|@]|I|@]|6|$]]|$B|L|D|M|2|N|G|1F|H|@]|I|@]|6|$O|P]]|$B|Q|D|R|2|F|G|1G|H|@]|I|@]|6|$]]|$B|S|D|T|2|N|G|1H|H|@]|I|@]|6|$O|P]]|$B|U|D|V|2|F|G|1I|H|@]|I|@]|6|$]]|$B|W|D|X|2|N|G|1J|H|@]|I|@]|6|$O|P]]|$B|Y|D|Z|2|F|G|1K|H|@]|I|@]|6|$]]|$B|10|D|11|2|F|G|1L|H|@]|I|@]|6|$]]|$B|12|D|13|2|F|G|1M|H|@]|I|@]|6|$]]|$B|14|D|-4|2|F|G|1N|H|@]|I|@]|6|$]]|$B|15|D|16|2|17|G|1O|H|@]|I|@$18|1P|19|1Q|B|1R]]|6|$]]|$B|1A|D|-4|2|F|G|1S|H|@]|I|@]|6|$]]|$B|1B|D|1C|2|F|G|1T|H|@]|I|@]|6|$]]]]

To draw your layout under statusbar:

values/styles.xml

<pre><code>&lt;item name="android:windowTranslucentStatus"&gt;true&lt;/item&gt;
</code></pre>

values-v21/styles.xml

<pre><code>&lt;item name="android:windowDrawsSystemBarBackgrounds"&gt;true&lt;/item&gt;
&lt;item name="android:statusBarColor"&gt;@color/colorPrimaryDark&lt;/item&gt;
</code></pre>

Use CoordinatorLayout/DrawerLayout which already take care of the fitsSystemWindows parameter or create your own layout to like this:

<pre><code>public class FitsSystemWindowConstraintLayout extends ConstraintLayout {

 private Drawable mStatusBarBackground;
 private boolean mDrawStatusBarBackground;

 private WindowInsetsCompat mLastInsets;

 private Map&lt;View, int[]&gt; childsMargins = new HashMap&lt;&gt;();

 public FitsSystemWindowConstraintLayout(Context context) {
 this(context, null);
 }

 public FitsSystemWindowConstraintLayout(Context context, AttributeSet attrs) {
 this(context, attrs, 0);
 }

 public FitsSystemWindowConstraintLayout(Context context, AttributeSet attrs, int defStyleAttr) {
 super(context, attrs, defStyleAttr);

 if (ViewCompat.getFitsSystemWindows(this)) {
 ViewCompat.setOnApplyWindowInsetsListener(this, new android.support.v4.view.OnApplyWindowInsetsListener() {
 @Override
 public WindowInsetsCompat onApplyWindowInsets(View view, WindowInsetsCompat insets) {
 FitsSystemWindowConstraintLayout layout = (FitsSystemWindowConstraintLayout) view;
 layout.setChildInsets(insets, insets.getSystemWindowInsetTop() &gt; 0);
 return insets.consumeSystemWindowInsets();
 }
 });
 setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
 | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
 TypedArray typedArray = context.obtainStyledAttributes(new int[]{android.R.attr.colorPrimaryDark});
 try {
 mStatusBarBackground = typedArray.getDrawable(0);
 } finally {
 typedArray.recycle();
 }
 } else {
 mStatusBarBackground = null;
 }
 }

 public void setChildInsets(WindowInsetsCompat insets, boolean draw) {
 mLastInsets = insets;
 mDrawStatusBarBackground = draw;
 setWillNotDraw(!draw &amp;&amp; getBackground() == null);

 for (int i = 0; i &lt; getChildCount(); i++) {
 View child = getChildAt(i);
 if (child.getVisibility() != GONE) {
 if (ViewCompat.getFitsSystemWindows(this)) {
 ConstraintLayout.LayoutParams layoutParams = (ConstraintLayout.LayoutParams) child.getLayoutParams();

 if (ViewCompat.getFitsSystemWindows(child)) {
 ViewCompat.dispatchApplyWindowInsets(child, insets);
 } else {
 int[] childMargins = childsMargins.get(child);
 if (childMargins == null) {
 childMargins = new int[]{layoutParams.leftMargin, layoutParams.topMargin, layoutParams.rightMargin, layoutParams.bottomMargin};
 childsMargins.put(child, childMargins);
 }
 if (layoutParams.leftToLeft == LayoutParams.PARENT_ID) {
 layoutParams.leftMargin = childMargins[0] + insets.getSystemWindowInsetLeft();
 }
 if (layoutParams.topToTop == LayoutParams.PARENT_ID) {
 layoutParams.topMargin = childMargins[1] + insets.getSystemWindowInsetTop();
 }
 if (layoutParams.rightToRight == LayoutParams.PARENT_ID) {
 layoutParams.rightMargin = childMargins[2] + insets.getSystemWindowInsetRight();
 }
 if (layoutParams.bottomToBottom == LayoutParams.PARENT_ID) {
 layoutParams.bottomMargin = childMargins[3] + insets.getSystemWindowInsetBottom();
 }
 }
 }
 }
 }

 requestLayout();
 }

 public void setStatusBarBackground(Drawable bg) {
 mStatusBarBackground = bg;
 invalidate();
 }

 public Drawable getStatusBarBackgroundDrawable() {
 return mStatusBarBackground;
 }

 public void setStatusBarBackground(int resId) {
 mStatusBarBackground = resId != 0 ? ContextCompat.getDrawable(getContext(), resId) : null;
 invalidate();
 }

 public void setStatusBarBackgroundColor(@ColorInt int color) {
 mStatusBarBackground = new ColorDrawable(color);
 invalidate();
 }

 @Override
 public void onDraw(Canvas canvas) {
 super.onDraw(canvas);
 if (mDrawStatusBarBackground &amp;&amp; mStatusBarBackground != null) {
 int inset = mLastInsets != null ? mLastInsets.getSystemWindowInsetTop() : 0;
 if (inset &gt; 0) {
 mStatusBarBackground.setBounds(0, 0, getWidth(), inset);
 mStatusBarBackground.draw(canvas);
 }
 }
 }
}
</code></pre>

main_activity.xml

<pre><code>&lt;FitsSystemWindowConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:fitsSystemWindows="true"&gt;

 &lt;ImageView
 android:layout_width="0dp"
 android:layout_height="0dp"
 android:fitsSystemWindows="true"
 android:scaleType="centerCrop"
 android:src="@drawable/toolbar_background"
 app:layout_constraintBottom_toBottomOf="@id/toolbar"
 app:layout_constraintLeft_toLeftOf="parent"
 app:layout_constraintRight_toRightOf="parent"
 app:layout_constraintTop_toTopOf="parent" /&gt;

 &lt;android.support.v7.widget.Toolbar
 android:id="@+id/toolbar"
 android:layout_width="0dp"
 android:layout_height="?attr/actionBarSize"
 android:background="@android:color/transparent"
 app:layout_constraintLeft_toLeftOf="parent"
 app:layout_constraintRight_toRightOf="parent"
 app:layout_constraintTop_toTopOf="parent" /&gt;

 &lt;LinearLayout
 android:layout_width="0dp"
 android:layout_height="0dp"
 android:gravity="center"
 app:layout_constraintBottom_toBottomOf="parent"
 app:layout_constraintLeft_toLeftOf="parent"
 app:layout_constraintRight_toRightOf="parent"
 app:layout_constraintTop_toBottomOf="@id/toolbar"&gt;

 &lt;TextView
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:gravity="center"
 android:text="Content"
 android:textSize="48sp" /&gt;
 &lt;/LinearLayout&gt;
&lt;/FitsSystemWindowConstraintLayout&gt;
</code></pre>

Result:

Screenshot: 
<a href="https://i.stack.imgur.com/DlHNA.png" rel="noreferrer"><img src="https://i.stack.imgur.com/DlHNA.png" alt="Screenshot"></a>

entityMap|blocks|key|1fh07|text|只需将这行代码添加到您的主java文件中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|a86s4|getWindow().setFlags(
++++WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
++++WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
);|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

Just add this line of code to your main java file:

<pre><code>getWindow().setFlags(
 WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
 WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
);
</code></pre>

entityMap|blocks|key|b4plr|text|这仅适用于API级别>=+21。这对我很有效。这是我的代码(Kotlin)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|escd6|override+fun+onCreate(savedInstanceState:+Bundle?)+{
++++++++super.onCreate(savedInstanceState)
++++++++setContentView(R.layout.activity_main)
++++++++findViewById(android.R.id.content).systemUiVisibility+=
++++++++++++++++View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN+or+View.SYSTEM_UI_FLAG_LAYOUT_STABLE
}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

This is only for API Level >= 21. It works for me.
Here is my code (Kotlin)

<pre><code>override fun onCreate(savedInstanceState: Bundle?) {
 super.onCreate(savedInstanceState)
 setContentView(R.layout.activity_main)
 findViewById&lt;View&gt;(android.R.id.content).systemUiVisibility =
 View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_STABLE
}
</code></pre>

entityMap|blocks|key|45li6|text|完全透明的StatusBar和NavigationBar|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|7ftbi|@Override
protected+void+onCreate(Bundle+savedInstanceState)+{
++++super.onCreate(savedInstanceState);
++++setContentView(R.layout.activity_main);

++++transparentStatusAndNavigation();
}


private+void+transparentStatusAndNavigation()+{
++++//make+full+transparent+statusBar
++++if+(Build.VERSION.SDK_INT+>=+19+&&+Build.VERSION.SDK_INT+<+21)+{
++++++++setWindowFlag(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
++++++++++++++++%7C+WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION,+true);
++++}
++++if+(Build.VERSION.SDK_INT+>=+19)+{
++++++++getWindow().getDecorView().setSystemUiVisibility(
++++++++++++++++View.SYSTEM_UI_FLAG_LAYOUT_STABLE
++++++++++++++++++++++++%7C+View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
++++++++++++++++++++++++%7C+View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
++++++++);
++++}
++++if+(Build.VERSION.SDK_INT+>=+21)+{
++++++++setWindowFlag(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
++++++++++++++++%7C+WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION,+false);
++++++++getWindow().setStatusBarColor(Color.TRANSPARENT);
++++++++getWindow().setNavigationBarColor(Color.TRANSPARENT);
++++}
}

private+void+setWindowFlag(final+int+bits,+boolean+on)+{
++++Window+win+=+getWindow();
++++WindowManager.LayoutParams+winParams+=+win.getAttributes();
++++if+(on)+{
++++++++winParams.flags+%7C=+bits;
++++}+else+{
++++++++winParams.flags+&=+~bits;
++++}
++++win.setAttributes(winParams);
}|code-block|syntax|javascript^0|0|S|0^^$0|$]|1|@$2|3|4|5|6|7|8|L|9|@$A|M|B|N|C|D]]|E|@]|F|$]]|$2|G|4|H|6|I|8|O|9|@]|E|@]|F|$J|K]]]]

Completely Transparent StatusBar and NavigationBar

<pre><code>@Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 transparentStatusAndNavigation();
}


private void transparentStatusAndNavigation() {
 //make full transparent statusBar
 if (Build.VERSION.SDK_INT &gt;= 19 &amp;&amp; Build.VERSION.SDK_INT &lt; 21) {
 setWindowFlag(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
 | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION, true);
 }
 if (Build.VERSION.SDK_INT &gt;= 19) {
 getWindow().getDecorView().setSystemUiVisibility(
 View.SYSTEM_UI_FLAG_LAYOUT_STABLE
 | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
 | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
 );
 }
 if (Build.VERSION.SDK_INT &gt;= 21) {
 setWindowFlag(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
 | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION, false);
 getWindow().setStatusBarColor(Color.TRANSPARENT);
 getWindow().setNavigationBarColor(Color.TRANSPARENT);
 }
}

private void setWindowFlag(final int bits, boolean on) {
 Window win = getWindow();
 WindowManager.LayoutParams winParams = win.getAttributes();
 if (on) {
 winParams.flags |= bits;
 } else {
 winParams.flags &amp;= ~bits;
 }
 win.setAttributes(winParams);
}
</code></pre>

entityMap|blocks|key|1hvn|text|下面是kotlin中的一个扩展，它可以做到这一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|cgnbi|fun+Activity.setTransparentStatusBar()+{
++++window.decorView.systemUiVisibility+=+View.SYSTEM_UI_FLAG_LAYOUT_STABLE+or+View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
++++if+(Build.VERSION.SDK_INT+>=+Build.VERSION_CODES.LOLLIPOP)+{
++++++++window.statusBarColor+=+Color.TRANSPARENT
++++}
}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

Here is a extension in kotlin that do the trick:

<pre><code>fun Activity.setTransparentStatusBar() {
 window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
 if (Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.LOLLIPOP) {
 window.statusBarColor = Color.TRANSPARENT
 }
}
</code></pre>

entityMap|blocks|key|e7ie6|text|适用于安卓KitKat和更高版本(对于那些想要透明状态栏而不操纵NavigationBar的人，因为所有这些答案都会使NavigationBar透明！)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|aau3r|实现这一目标的最简单方法是：|6ij6f|将这3行代码放入styles.xml+(v19)如果您不知道如何使用它(v19)，只需在您的默认设置中编写它们即可styles.xml然后使用alt%2Benter自动创建：|offset|length|style|CODE|3ie7u|false
@null
false|code-block|syntax|javascript|87alq|现在，转到您的MainActivity类，并将此方法放在类中的onCreate之外：|84tat|public+static+void+setWindowFlag(Activity+activity,+final+int+bits,+boolean+on)+{

++++Window+win+=+activity.getWindow();
++++WindowManager.LayoutParams+winParams+=+win.getAttributes();
++++if+(on)+{
++++++++winParams.flags+%7C=+bits;
++++}+else+{
++++++++winParams.flags+&=+~bits;
++++}
++++win.setAttributes(winParams);
}|11dr2|然后将此代码放入onCreate活动的方法：|5917e|if+(Build.VERSION.SDK_INT+>=+19+&&+Build.VERSION.SDK_INT+<+21)+{
++++++++setWindowFlag(this,+WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS,+true);
++++}
++++if+(Build.VERSION.SDK_INT+>=+19)+{
++++++++getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE+%7C+View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
++++}
++++//make+fully+Android+Transparent+Status+bar
++++if+(Build.VERSION.SDK_INT+>=+21)+{
++++++++setWindowFlag(this,+WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS,+false);
++++++++getWindow().setStatusBarColor(Color.TRANSPARENT);
++++}|5k999|就是这样！^0|0|0|8|G|1L|A|0|0|7|C|0|0|8|8|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|Z|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|10|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|11|9|@$G|12|H|13|I|J]|$G|14|H|15|I|J]]|A|@]|B|$]]|$2|K|4|L|6|M|8|16|9|@]|A|@]|B|$N|O]]|$2|P|4|Q|6|7|8|17|9|@$G|18|H|19|I|J]]|A|@]|B|$]]|$2|R|4|S|6|M|8|1A|9|@]|A|@]|B|$N|O]]|$2|T|4|U|6|7|8|1B|9|@$G|1C|H|1D|I|J]]|A|@]|B|$]]|$2|V|4|W|6|M|8|1E|9|@]|A|@]|B|$N|O]]|$2|X|4|Y|6|7|8|1F|9|@]|A|@]|B|$]]]]

Works for Android KitKat and above (For those who want to transparent the status bar and don't manipulate the NavigationBar, because all of these answers will transparent the NavigationBar too!)

The easiest way to achieve it:

Put these 3 lines of code in the <code>styles.xml (v19)</code> -> if you don't know how to have this (v19), just write them in your default <code>styles.xml</code> and then use <kbd>alt</kbd>+<kbd>enter</kbd> to automatically create it:

<pre><code>&lt;item name="android:windowFullscreen"&gt;false&lt;/item&gt;
&lt;item name="android:windowContentOverlay"&gt;@null&lt;/item&gt;
&lt;item name="android:fitsSystemWindows"&gt;false&lt;/item&gt;
</code></pre>

And now, go to your <code>MainActivity</code> Class and put this Method out of onCreate in the class:

<pre><code>public static void setWindowFlag(Activity activity, final int bits, boolean on) {

 Window win = activity.getWindow();
 WindowManager.LayoutParams winParams = win.getAttributes();
 if (on) {
 winParams.flags |= bits;
 } else {
 winParams.flags &amp;= ~bits;
 }
 win.setAttributes(winParams);
}
</code></pre>

Then put this code in the <code>onCreate</code> method of the Activity:

<pre><code>if (Build.VERSION.SDK_INT &gt;= 19 &amp;&amp; Build.VERSION.SDK_INT &lt; 21) {
 setWindowFlag(this, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, true);
 }
 if (Build.VERSION.SDK_INT &gt;= 19) {
 getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
 }
 //make fully Android Transparent Status bar
 if (Build.VERSION.SDK_INT &gt;= 21) {
 setWindowFlag(this, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, false);
 getWindow().setStatusBarColor(Color.TRANSPARENT);
 }
</code></pre>

That's it!

entityMap|blocks|key|cdrem|text|尝试以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|bl1d4|private+static+void+setStatusBarTransparent(Activity+activity)+{
++++if+(Build.VERSION.SDK_INT+>=+Build.VERSION_CODES.LOLLIPOP)+{
++++++++activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
++++++++activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
++++++++activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
++++++++activity.getWindow().+setStatusBarColor(Color.TRANSPARENT);
++++}+else+{
++++++++activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
++++}
}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

Try the following code:
<pre><code>private static void setStatusBarTransparent(Activity activity) {
 if (Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.LOLLIPOP) {
 activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
 activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
 activity.getWindow(). setStatusBarColor(Color.TRANSPARENT);
 } else {
 activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 }
}
</code></pre>

entityMap|blocks|key|dt6he|text|在setContentView()之前将这些行添加到您的活动中|type|unstyled|depth|inlineStyleRanges|entityRanges|data|77c31|if+(Build.VERSION.SDK_INT+>=+Build.VERSION_CODES.KITKAT)+{
++++Window+w+=+getWindow();
++++w.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,+WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
}|code-block|syntax|javascript|35l80|将这两行代码添加到您的AppTheme中|flneo|true
true|f4cq5|最后一件事你的minSdkVersion必须是b19|44f3t|minSdkVersion+19^0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|P|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|Q|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|R|9|@]|A|@]|B|$]]|$2|J|4|K|6|E|8|S|9|@]|A|@]|B|$F|G]]|$2|L|4|M|6|7|8|T|9|@]|A|@]|B|$]]|$2|N|4|O|6|E|8|U|9|@]|A|@]|B|$F|G]]]]

add these lines into your Activity before the setContentView()

<pre><code>if (Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.KITKAT) {
 Window w = getWindow();
 w.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
}
</code></pre>

add these 2 lines into your AppTheme

<pre><code>&lt;item name="android:windowTranslucentStatus"&gt;true&lt;/item&gt;
&lt;item name="android:windowTranslucentNavigation"&gt;true&lt;/item&gt;
</code></pre>

and last thing your minSdkVersion must b 19 

<pre><code>minSdkVersion 19
</code></pre>

entityMap|blocks|key|bhb55|text|这对我很有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|eeoip|@android:color/transparent
@android:color/transparent
false
false|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

This worked for me:

<pre><code>&lt;item name="android:statusBarColor"&gt;@android:color/transparent&lt;/item&gt;
&lt;item name="android:navigationBarColor"&gt;@android:color/transparent&lt;/item&gt;
&lt;item name="android:windowTranslucentStatus"&gt;false&lt;/item&gt;
&lt;item name="android:windowTranslucentNavigation"&gt;false&lt;/item&gt;
</code></pre>

entityMap|blocks|key|4ss7t|text|所有需要做的就是进入MainActivity.java|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|sr5h|protected+void+onCreate(Bundle+savedInstanceState)+{
++++++++super.onCreate(savedInstanceState);

++++++++Window+g+=+getWindow();
++++++++g.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,+WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);

++++++++setContentView(R.layout.activity_main);

++++}|code-block|syntax|javascript^0|A|H|0^^$0|$]|1|@$2|3|4|5|6|7|8|L|9|@$A|M|B|N|C|D]]|E|@]|F|$]]|$2|G|4|H|6|I|8|O|9|@]|E|@]|F|$J|K]]]]

All one need is to go into <code>MainActivity.java</code>

<hr>

<pre><code>protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);

 Window g = getWindow();
 g.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);

 setContentView(R.layout.activity_main);

 }
</code></pre>

entityMap|blocks|key|1fp4p|text|有三个步骤：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|fakpp|1)只需在OnCreate方法中使用此代码段即可|5e3pa|//+FullScreen
++getWindow().setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,+
++WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);|code-block|syntax|javascript|8rd8l|如果您正在处理片段，则应该将此代码段放入活动的OnCreate方法中。|1umri|2)还要确保在/res/values-v21/styles.xml中设置透明度：|cimpl|@android:color/transparent|cqiaj|或者，您可以通过编程方式设置透明度：|ceail|getWindow().setStatusBarColor(Color.TRANSPARENT);|230f|3)无论如何，您都应该在styles.xml中添加代码段|6nq2k|true|ehpcs|注意：此方法仅适用于API+21及更高版本。^0|0|6|0|0|2|0|0|0|0|2|0|0|0|0|0|2|0|0|0|3^^$0|$]|1|@$2|3|4|5|6|7|8|13|9|@$A|14|B|15|C|D]]|E|@]|F|$]]|$2|G|4|H|6|7|8|16|9|@$A|17|B|18|C|D]]|E|@]|F|$]]|$2|I|4|J|6|K|8|19|9|@]|E|@]|F|$L|M]]|$2|N|4|O|6|7|8|1A|9|@]|E|@]|F|$]]|$2|P|4|Q|6|7|8|1B|9|@$A|1C|B|1D|C|D]]|E|@]|F|$]]|$2|R|4|S|6|K|8|1E|9|@]|E|@]|F|$L|M]]|$2|T|4|U|6|7|8|1F|9|@]|E|@]|F|$]]|$2|V|4|W|6|K|8|1G|9|@]|E|@]|F|$L|M]]|$2|X|4|Y|6|7|8|1H|9|@$A|1I|B|1J|C|D]]|E|@]|F|$]]|$2|Z|4|10|6|K|8|1K|9|@]|E|@]|F|$L|M]]|$2|11|4|12|6|7|8|1L|9|@$A|1M|B|1N|C|D]]|E|@]|F|$]]]]

THERE ARE THREE STEPS:
1) Just use this code segment into your OnCreate method
<pre><code> // FullScreen
 getWindow().setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, 
 WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
</code></pre>
If you’re working on Fragment, you should put this code segment in your activity’s OnCreate method.
2) Be sure to also set the transparency in /res/values-v21/styles.xml:
<pre><code>&lt;item name=&quot;android:statusBarColor&quot;&gt;@android:color/transparent&lt;/item&gt;
</code></pre>
Or you can set the transparency programmatically:
<pre><code>getWindow().setStatusBarColor(Color.TRANSPARENT);
</code></pre>
3) In anyway you should add the code segment in styles.xml
<pre><code>&lt;item name=&quot;android:windowTranslucentStatus&quot;&gt;true&lt;/item&gt;
</code></pre>
NOTE: This method just works on API 21 and above.

entityMap|blocks|key|ejusi|text|在我的例子中，因为我有一个底部的工具栏，在测试之前的解决方案时我遇到了一个问题，android系统按钮覆盖在我的底部菜单中，我的解决方案是在活动中添加：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3kgdv|protected+void+onCreate(捆绑包){+super.onCreate(+savedInstanceState)；|6j0up|//强制全屏模式requestWindowFeature(Window.FEATURE_没有_标题)；getWindow().setFlags(WindowManager.LayoutParams.FLAG_|4ldc|全屏，WindowManager.LayoutParams.FLAG_全屏)；setContentView(R.layout.main_活动_容器)；^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|J|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|K|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|L|9|@]|A|@]|B|$]]]]

in my case as I've a bottom tool bar I had a problem when testing the previous solutions, the android system buttons are covered with my bottom menu
my solution is to add within the activity:

<blockquote>
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);

<pre><code> // force full screen mode
 requestWindowFeature(Window.FEATURE_NO_TITLE);
 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
 WindowManager.LayoutParams.FLAG_FULLSCREEN);


 setContentView(R.layout.main_activity_container);
</code></pre>
</blockquote>

entityMap|blocks|key|b13m7|text|你可以在下面的代码中使用它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3887g|getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);+
getWindow().setStatusBarColor(Color.TRANSPARENT);|code-block|syntax|javascript|c1mhe|将此布局包含在您的主布局中。|8nii7|toolbar.xml|ehh6i|//add+your+color+here|bog7b|注意:您可以将SDP和SSP分别替换为dp和sp。|offset|length|style|BOLD^0|0|0|0|0|0|0|P^^$0|$]|1|@$2|3|4|5|6|7|8|T|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|U|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|V|9|@]|A|@]|B|$]]|$2|J|4|K|6|7|8|W|9|@]|A|@]|B|$]]|$2|L|4|M|6|E|8|X|9|@]|A|@]|B|$F|G]]|$2|N|4|O|6|7|8|Y|9|@$P|Z|Q|10|R|S]]|A|@]|B|$]]]]

You can use this below code.

<pre><code>getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN); 
getWindow().setStatusBarColor(Color.TRANSPARENT);
</code></pre>

Include this layout in your main layout.

toolbar.xml

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;androidx.appcompat.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/toolbarNav"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:background="@android:color/transparent"
 app:contentInsetEnd="0dp"
 app:contentInsetLeft="0dp"
 app:contentInsetRight="0dp"
 app:contentInsetStart="0dp"&gt;

 &lt;RelativeLayout
 android:id="@+id/rlBackImageLayout"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:background="@drawable/main_background2"&gt; //add your color here

 &lt;LinearLayout
 android:layout_width="match_parent"
 android:layout_height="@dimen/_40sdp"
 android:layout_marginTop="@dimen/_16sdp"
 android:orientation="horizontal"&gt;

 &lt;ImageView
 android:id="@+id/toolbarIcon"
 android:layout_width="@dimen/_30sdp"
 android:layout_height="@dimen/_30sdp"
 android:layout_gravity="center"
 android:layout_marginStart="@dimen/_10sdp"
 android:padding="@dimen/_5sdp"
 android:src="@drawable/nav_icon" /&gt;

 &lt;TextView
 android:id="@+id/txtTitle"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:layout_gravity="center"
 android:layout_marginEnd="@dimen/_30sdp"
 android:fontFamily="@font/muli_semibold"
 android:gravity="center"
 android:textColor="#fff"
 android:textSize="@dimen/_14ssp"
 android:textStyle="bold"
 tools:text="test Data" /&gt;

 &lt;/LinearLayout&gt;

 &lt;/RelativeLayout&gt;

 &lt;/androidx.appcompat.widget.Toolbar&gt;
</code></pre>

Note: You can replace SDP and SSP with dp and sp respectively.

entityMap|blocks|key|bkmtc|text|在我的例子中，我根本不调用"onCreate“(它是一个react原生应用程序，这也可以通过使用react原生StatusBar组件进行修复)还可以使用以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|8326f|override+fun+onStart()+{
++++++++super.onStart()
++++++++window.decorView.systemUiVisibility+=+View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN+or+View.SYSTEM_UI_FLAG_LAYOUT_STABLE
++++++++window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
++++++++window.statusBarColor+=+Color.TRANSPARENT
}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

in my case, i dont call at all "onCreate" (its a react native app and this can be fixes also by using the react-native StatusBar component) one can also use this:

<pre><code>override fun onStart() {
 super.onStart()
 window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_STABLE
 window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
 window.statusBarColor = Color.TRANSPARENT
}
</code></pre>

entityMap|0|type|IMAGE|mutability|IMMUTABLE|data|imageUrl|https://ask.qcloudimg.com/http-save/actteam/1aa69f682008bd3ebd50585c99da77f7.png|imageAlt|blocks|key|3nsfi|text|您可以使用下面的代码使状态栏透明。请参阅红色突出显示的图像，帮助您识别以下代码的用法|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|fnu8l|4pvpq|?|atomic|3f2m3|用于android应用程序的Kotlin代码片段|d54au|步骤:1在create方法中写下代码|cj4mn|if+(Build.VERSION.SDK_INT+>=+19+&&+Build.VERSION.SDK_INT+<+21)+{
++++setWindowFlag(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS,+true)
}
if+(Build.VERSION.SDK_INT+>=+19)+{
++++window.decorView.systemUiVisibility+=+View.SYSTEM_UI_FLAG_LAYOUT_STABLE+or+View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
}
if+(Build.VERSION.SDK_INT+>=+21)+{
++++setWindowFlag(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS,+false)
++++window.statusBarColor+=+Color.TRANSPARENT
}|code-block|syntax|javascript|3dvbm|Step2：你需要在下面的代码中描述的SetWindowFlag方法。|8a4ar|private+fun+setWindowFlag(bits:+Int,+on:+Boolean)+{
++++val+win+=+window
++++val+winParams+=+win.attributes
++++if+(on)+{
++++++++winParams.flags+=+winParams.flags+or+bits
++++}+else+{
++++++++winParams.flags+=+winParams.flags+and+bits.inv()
++++}
++++win.attributes+=+winParams
}|csjoo|android应用程序的Java代码片段：|ad91g|Step1：主要活动代码|806hk|if+(Build.VERSION.SDK_INT+>=+19+&&+Build.VERSION.SDK_INT+<+21)+{
++++setWindowFlag(this,+WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS,+true);
}
if+(Build.VERSION.SDK_INT+>=+19)+{
++++getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE+%7C+View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}

if+(Build.VERSION.SDK_INT+>=+21)+{
++++setWindowFlag(this,+WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS,+false);
++++getWindow().setStatusBarColor(Color.TRANSPARENT);
}|fcob|Step2：SetWindowFlag方法|den10|public+static+void+setWindowFlag(Activity+activity,+final+int+bits,+boolean+on)+{
++++Window+win+=+activity.getWindow();
++++WindowManager.LayoutParams+winParams+=+win.getAttributes();
++++if+(on)+{
++++++++winParams.flags+%7C=+bits;
++++}+else+{
++++++++winParams.flags+&=+~bits;
++++}
++++win.setAttributes(winParams);
}^0|0|16|0|0|0|1|0|0|0|O|0|0|4|0|0|0|6|0|0|0|L|0|0|5|0|0|0|5|0^^$0|$1|$2|3|4|5|6|$7|8|9|-4]]]|A|@$B|C|D|E|2|F|G|1E|H|@$I|1F|J|1G|K|L]]|M|@]|6|$]]|$B|N|D|-4|2|F|G|1H|H|@]|M|@]|6|$]]|$B|O|D|P|2|Q|G|1I|H|@]|M|@$I|1J|J|1K|B|1L]]|6|$]]|$B|R|D|S|2|F|G|1M|H|@$I|1N|J|1O|K|L]]|M|@]|6|$]]|$B|T|D|U|2|F|G|1P|H|@$I|1Q|J|1R|K|L]]|M|@]|6|$]]|$B|V|D|W|2|X|G|1S|H|@]|M|@]|6|$Y|Z]]|$B|10|D|11|2|F|G|1T|H|@$I|1U|J|1V|K|L]]|M|@]|6|$]]|$B|12|D|13|2|X|G|1W|H|@]|M|@]|6|$Y|Z]]|$B|14|D|15|2|F|G|1X|H|@$I|1Y|J|1Z|K|L]]|M|@]|6|$]]|$B|16|D|17|2|F|G|20|H|@$I|21|J|22|K|L]]|M|@]|6|$]]|$B|18|D|19|2|X|G|23|H|@]|M|@]|6|$Y|Z]]|$B|1A|D|1B|2|F|G|24|H|@$I|25|J|26|K|L]]|M|@]|6|$]]|$B|1C|D|1D|2|X|G|27|H|@]|M|@]|6|$Y|Z]]]]

You Can Use Below Code To Make Status Bar Transparent.
See Images With red highlight which helps you to identify use of Below code

<img src="https://i.stack.imgur.com/wOgJi.png" alt="1]">

Kotlin code snippet for your android app

Step:1 Write down code in On create Method

<pre><code>if (Build.VERSION.SDK_INT &gt;= 19 &amp;&amp; Build.VERSION.SDK_INT &lt; 21) {
 setWindowFlag(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, true)
}
if (Build.VERSION.SDK_INT &gt;= 19) {
 window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
}
if (Build.VERSION.SDK_INT &gt;= 21) {
 setWindowFlag(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, false)
 window.statusBarColor = Color.TRANSPARENT
}
</code></pre>

Step2: You Need SetWindowFlag method which describe in Below code.

<pre><code>private fun setWindowFlag(bits: Int, on: Boolean) {
 val win = window
 val winParams = win.attributes
 if (on) {
 winParams.flags = winParams.flags or bits
 } else {
 winParams.flags = winParams.flags and bits.inv()
 }
 win.attributes = winParams
}
</code></pre>

Java code snippet for your android app:

Step1: Main Activity Code

<pre><code>if (Build.VERSION.SDK_INT &gt;= 19 &amp;&amp; Build.VERSION.SDK_INT &lt; 21) {
 setWindowFlag(this, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, true);
}
if (Build.VERSION.SDK_INT &gt;= 19) {
 getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}

if (Build.VERSION.SDK_INT &gt;= 21) {
 setWindowFlag(this, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, false);
 getWindow().setStatusBarColor(Color.TRANSPARENT);
}
</code></pre>

Step2: SetWindowFlag Method

<pre><code>public static void setWindowFlag(Activity activity, final int bits, boolean on) {
 Window win = activity.getWindow();
 WindowManager.LayoutParams winParams = win.getAttributes();
 if (on) {
 winParams.flags |= bits;
 } else {
 winParams.flags &amp;= ~bits;
 }
 win.setAttributes(winParams);
}
</code></pre>

entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://github.com/laobie/StatusBarUtil|blocks|key|cfgff|text|我在调查这个库的时候找到了答案：|unstyled|depth|inlineStyleRanges|entityRanges|8akgv|offset|length|b21es|因此，您需要将以下代码添加到您的活动中|2kmka|if+(Build.VERSION.SDK_INT+>=+Build.VERSION_CODES.LOLLIPOP)+{
++++window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
++++window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
++++window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION)
++++window.statusBarColor+=+Color.TRANSPARENT
}+else+{
++++window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
}|code-block|syntax|javascript^0|0|0|13|0|0|0^^$0|$1|$2|3|4|5|6|$7|8]]]|9|@$A|B|C|D|2|E|F|S|G|@]|H|@]|6|$]]|$A|I|C|8|2|E|F|T|G|@]|H|@$J|U|K|V|A|W]]|6|$]]|$A|L|C|M|2|E|F|X|G|@]|H|@]|6|$]]|$A|N|C|O|2|P|F|Y|G|@]|H|@]|6|$Q|R]]]]

I found the answer while I investigating this library:
<a href="https://github.com/laobie/StatusBarUtil" rel="nofollow noreferrer">https://github.com/laobie/StatusBarUtil</a>

so you need to add following codes to your activity 

<pre><code>if (Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.LOLLIPOP) {
 window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
 window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
 window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION)
 window.statusBarColor = Color.TRANSPARENT
} else {
 window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
}
</code></pre>

entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://proandroiddev.com/draw-under-status-bar-like-a-pro-db38cfff2870|blocks|key|160t4|text|虽然上面的所有答案都围绕着相同的基本思想，但您可以使用上面的示例之一将其用于简单的布局。然而，我想改变背景的颜色，同时使用滑动的“全屏”(标签栏除外)片段导航，并保持常规的导航，标签和动作栏。|unstyled|depth|inlineStyleRanges|entityRanges|325n1|仔细阅读后Anton+Hadutski的一篇文章|offset|length|85lf0|我最好弄清楚到底是怎么回事。|2m6f8|我有DrawerLayout使用ConstraintLayout(即容器)，它具有Toolbar，包含用于主片段的BottomNavigationView..。设置DrawerLayout拥有fitsSystemWindows设置为true是不够的，您需要将两者都设置为DrawerLayout和ConstraintLayout..。假设状态栏是透明的，则状态栏的颜色现在与..。|style|CODE|3itlu|然而，包含的片段仍然有插入的状态栏，所以在with上动画另一个“全屏”片段不会改变状态栏的颜色。引用的文章中的一小段代码Activity%25sonCreate:|1p275|ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.container))+{+view,+insets+->
++++++++insets.replaceSystemWindowInsets(
++++++++++++++++insets.systemWindowInsetLeft,
++++++++++++++++0,
++++++++++++++++insets.systemWindowInsetRight,
++++++++++++++++insets.systemWindowInsetBottom
++++++++)
++++}|code-block|syntax|javascript|bekat|一切都很好，除了现在Toolbar不处理状态栏高度。更多的参考这篇文章，我们有一个完全有效的解决方案：|an8oo|val+toolbar+=+findViewById(R.id.my_toolbar)
++++ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.container))+{+view,+insets+->
++++++++val+params+=+toolbar.layoutParams+as+ViewGroup.MarginLayoutParams
++++++++params.topMargin+=+insets.systemWindowInsetTop
++++++++toolbar.layoutParams+=+params
++++++++insets.replaceSystemWindowInsets(
++++++++++++++++insets.systemWindowInsetLeft,
++++++++++++++++0,
++++++++++++++++insets.systemWindowInsetRight,
++++++++++++++++insets.systemWindowInsetBottom
++++++++)
++++}|dkfdk|main_activity.xml+(请注意，marginTop+inToolbar用于预览，它将被代码替换)：|cagtj|...
++++++++

++++++++
++++++++...
++++
++++...^0|0|5|J|0|0|0|2|C|G|G|15|7|1L|K|2A|C|2O|H|3R|C|44|G|0|1O|8|1Y|8|0|0|A|7|0|0|Z|7|0^^$0|$1|$2|3|4|5|6|$7|8]]]|9|@$A|B|C|D|2|E|F|17|G|@]|H|@]|6|$]]|$A|I|C|J|2|E|F|18|G|@]|H|@$K|19|L|1A|A|1B]]|6|$]]|$A|M|C|N|2|E|F|1C|G|@]|H|@]|6|$]]|$A|O|C|P|2|E|F|1D|G|@$K|1E|L|1F|Q|R]|$K|1G|L|1H|Q|R]|$K|1I|L|1J|Q|R]|$K|1K|L|1L|Q|R]|$K|1M|L|1N|Q|R]|$K|1O|L|1P|Q|R]|$K|1Q|L|1R|Q|R]|$K|1S|L|1T|Q|R]]|H|@]|6|$]]|$A|S|C|T|2|E|F|1U|G|@$K|1V|L|1W|Q|R]|$K|1X|L|1Y|Q|R]]|H|@]|6|$]]|$A|U|C|V|2|W|F|1Z|G|@]|H|@]|6|$X|Y]]|$A|Z|C|10|2|E|F|20|G|@$K|21|L|22|Q|R]]|H|@]|6|$]]|$A|11|C|12|2|W|F|23|G|@]|H|@]|6|$X|Y]]|$A|13|C|14|2|E|F|24|G|@$K|25|L|26|Q|R]]|H|@]|6|$]]|$A|15|C|16|2|W|F|27|G|@]|H|@]|6|$X|Y]]]]

While all the answers above circulate around the same fundamental idea and you can get it to work with simple layouts using one of the examples above. However I wanted to change the color of the background while using sliding 'full screen' (tab bar aside) fragment navigation and maintain regular navigation, tab and action bars.

After reading carefully <a href="https://proandroiddev.com/draw-under-status-bar-like-a-pro-db38cfff2870" rel="nofollow noreferrer">an article by Anton Hadutski</a> I had better understanding what is going on.

I have <code>DrawerLayout</code> with <code>ConstraintLayout</code> (i.e. container) which has <code>Toolbar</code>, include for the main fragment and <code>BottomNavigationView</code>.

Setting <code>DrawerLayout</code> having <code>fitsSystemWindows</code> to true isn't sufficient, you need to set both <code>DrawerLayout</code> and <code>ConstraintLayout</code>. Assuming transparent status bar, the status bar color is now the same as the background color of <code>ConstraintLayout</code>.

However, the included fragment has still the status bar inset, so animating another 'full screen' fragment on top of with doesn't change the color of the status bar.

A bit of code from the referred article into <code>Activity</code>'s <code>onCreate</code>:

<pre><code>ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.container)) { view, insets -&gt;
 insets.replaceSystemWindowInsets(
 insets.systemWindowInsetLeft,
 0,
 insets.systemWindowInsetRight,
 insets.systemWindowInsetBottom
 )
 }
</code></pre>

And all is good, except now the <code>Toolbar</code> doesn't address the status bar height. Some more referring to the article and we have a fully working solution:

<pre><code>val toolbar = findViewById&lt;Toolbar&gt;(R.id.my_toolbar)
 ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.container)) { view, insets -&gt;
 val params = toolbar.layoutParams as ViewGroup.MarginLayoutParams
 params.topMargin = insets.systemWindowInsetTop
 toolbar.layoutParams = params
 insets.replaceSystemWindowInsets(
 insets.systemWindowInsetLeft,
 0,
 insets.systemWindowInsetRight,
 insets.systemWindowInsetBottom
 )
 }
</code></pre>

The main_activity.xml (please note that marginTop in <code>Toolbar</code> is for preview purposes, it will be replaced by the code):

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
 &lt;androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 android:id="@+id/drawer_layout"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:fitsSystemWindows="true"
 &gt;

 &lt;androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/container"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:background="@color/green"
 android:fitsSystemWindows="true"
 tools:context=".MainActivity"&gt;

 &lt;androidx.appcompat.widget.Toolbar
 android:id="@+id/my_toolbar"
 android:layout_width="match_parent"
 android:layout_height="?attr/actionBarSize"
 app:layout_constraintTop_toTopOf="@id/container"
 android:layout_marginTop="26dp" 
 android:background="@android:color/transparent"
 ...&gt;
 ...
 &lt;/androidx.appcompat.widget.Toolbar&gt;

 &lt;include layout="@layout/content_main" /&gt;
 ...
 &lt;/androidx.constraintlayout.widget.ConstraintLayout&gt;
 ...
&lt;/androidx.drawerlayout.widget.DrawerLayout&gt;
</code></pre>

entityMap|blocks|key|eepgu|text|我发现摆弄styles.xml和activity太麻烦了，因此创建了一个通用的实用方法，它设置了以下选项|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3in82|Java|9qq8j|Window+window+=+getWindow();
window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
window.setStatusBarColor(Color.TRANSPARENT);|code-block|syntax|javascript|2dg37|Kotlin+DSL|7hc9p|activity.window.apply+{
++++clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
++++addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
++++decorView.systemUiVisibility+=+View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
++++statusBarColor+=+Color.TRANSPARENT
}|c05g2|这就是实现透明状态栏所需的全部内容。希望这能有所帮助。^0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|P|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|Q|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|R|9|@]|A|@]|B|$H|I]]|$2|J|4|K|6|7|8|S|9|@]|A|@]|B|$]]|$2|L|4|M|6|G|8|T|9|@]|A|@]|B|$H|I]]|$2|N|4|O|6|7|8|U|9|@]|A|@]|B|$]]]]

I found fiddling with styles.xml and activity to be too cumbersome hence created a common utility method which has below options set

Java

<pre><code>Window window = getWindow();
window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
window.setStatusBarColor(Color.TRANSPARENT);
</code></pre>

Kotlin DSL

<pre><code>activity.window.apply {
 clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
 addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
 decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
 statusBarColor = Color.TRANSPARENT
}
</code></pre>

And that's all it took to achieve transparent status bar. Hope this helps.

entityMap|blocks|key|7non0|text|这应该是可行的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2ikf3|//例如，在Activity的onCreate()中|7b4rh|if+(Build.VERSION.SDK_INT+>=+Build.VERSION_CODES.KITKAT)+{
++++Window+w+=+getWindow();
++++w.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,+WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
}|code-block|syntax|javascript^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|J|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|K|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|L|9|@]|A|@]|B|$H|I]]]]

This should work 

// In Activity's onCreate() for instance

<pre><code>if (Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.KITKAT) {
 Window w = getWindow();
 w.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
}
</code></pre>

entityMap|blocks|key|8adn0|text|下面是Kotlin扩展：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|cf6n8|fun+Activity.transparentStatusBar()+{

++++if+(Build.VERSION.SDK_INT+>=+Build.VERSION_CODES.LOLLIPOP)+{

++++++++window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
++++++++window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
++++++++window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION)
++++++++window.statusBarColor+=+Color.TRANSPARENT

++++}+else
++++++++window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)

}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

Here is the Kotlin Extension:
<pre><code>fun Activity.transparentStatusBar() {

 if (Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.LOLLIPOP) {

 window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
 window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
 window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION)
 window.statusBarColor = Color.TRANSPARENT

 } else
 window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)

}
</code></pre>

entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://developer.android.com/training/system-ui/status#behind|1|https://proandroiddev.com/draw-under-status-bar-like-a-pro-db38cfff2870|2|https://stackoverflow.com/questions/29311078/android-completely-transparent-status-bar/63460431#63460431|blocks|key|8c0ud|text|简单明了，几乎适用于所有用例(+API级别16及以上)：|unstyled|depth|inlineStyleRanges|entityRanges|eumk2|在应用程序主题中使用以下标记可使状态栏透明：@android:color/transparent|ordered-list-item|offset|length|style|CODE|1k1sf|然后在活动的onCreate方法中使用此代码。View+decorView+=+getWindow().getDecorView()decorView.setSystemUiVisibility(View.SYSTEM_用户界面_标志_布局_稳定%7C+View.SYSTEM_用户界面_标志_布局_全屏)；|8fre0|这就是您需要做的全部工作;)|mk0g|您可以从开发人员文档。我也推荐阅读这个博客文章。|9o1vi|KOTLIN代码|BOLD|alg|val+decorView+=+window.decorView
++++decorView.systemUiVisibility+=+(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
++++++++++++or+View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN)|code-block|syntax|javascript|3rdu6|检查我的另一个答案这里^0|0|M|Q|0|0|0|4|7|0|H|2|1|0|0|8|0|0|9|2|2^^$0|$1|$2|3|4|5|6|$7|8]]|9|$2|3|4|5|6|$7|A]]|B|$2|3|4|5|6|$7|C]]]|D|@$E|F|G|H|2|I|J|19|K|@]|L|@]|6|$]]|$E|M|G|N|2|O|J|1A|K|@$P|1B|Q|1C|R|S]]|L|@]|6|$]]|$E|T|G|U|2|O|J|1D|K|@]|L|@]|6|$]]|$E|V|G|W|2|I|J|1E|K|@]|L|@]|6|$]]|$E|X|G|Y|2|I|J|1F|K|@]|L|@$P|1G|Q|1H|E|1I]|$P|1J|Q|1K|E|1L]]|6|$]]|$E|Z|G|10|2|I|J|1M|K|@$P|1N|Q|1O|R|11]]|L|@]|6|$]]|$E|12|G|13|2|14|J|1P|K|@]|L|@]|6|$15|16]]|$E|17|G|18|2|I|J|1Q|K|@]|L|@$P|1R|Q|1S|E|1T]]|6|$]]]]

Simple and crisp and works with almost all use cases (for API level 16 and above):
<ol>
<li>Use the following tag in your app theme to make the status bar transparent:
<code>&lt;item name=&quot;android:statusBarColor&quot;&gt;@android:color/transparent&lt;/item&gt;</code>
</li>
<li>And then use this code in your activity's onCreate method.
<pre><code>View decorView = getWindow().getDecorView();
decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
 | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
</code></pre>
</li>
</ol>
That's all you need to do ;)
You can learn more from the <a href="https://developer.android.com/training/system-ui/status#behind" rel="noreferrer">developer documentation.</a> I'd also recommend reading <a href="https://proandroiddev.com/draw-under-status-bar-like-a-pro-db38cfff2870" rel="noreferrer">this</a> blog post.
KOTLIN CODE:
<pre><code> val decorView = window.decorView
 decorView.systemUiVisibility = (View.SYSTEM_UI_FLAG_LAYOUT_STABLE
 or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN)
</code></pre>
Check my another answer <a href="https://stackoverflow.com/a/63460431/12980866">here</a>

entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://developer.android.com/training/system-ui/immersive|blocks|key|fls2n|text|下面的代码将使状态栏和导航栏变得透明(请注意，这将使您的布局像游戏中使用的布局一样成为全屏布局)：|unstyled|depth|inlineStyleRanges|entityRanges|ehh1s|@Override
public+void+onWindowFocusChanged(boolean+hasFocus)+{
++++super.onWindowFocusChanged(hasFocus);
++++if+(hasFocus)+{
++++++++hideSystemUI();
++++}
}

private+void+hideSystemUI()+{
++++//+Enables+sticky+immersive+mode.
++++//+For+"lean+back"+mode,+remove+SYSTEM_UI_FLAG_IMMERSIVE_STICKY.
++++//+Or+for+regular+immersive+mode+replace+it+with+SYSTEM_UI_FLAG_IMMERSIVE
++++View+decorView+=+getWindow().getDecorView();
++++decorView.setSystemUiVisibility(
++++++++++++View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
++++++++++++++++++++//+Set+the+content+to+appear+under+the+system+bars+so+that+the
++++++++++++++++++++//+content+doesn't+resize+when+the+system+bars+hide+and+show.
++++++++++++++++++++%7C+View.SYSTEM_UI_FLAG_LAYOUT_STABLE
++++++++++++++++++++%7C+View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
++++++++++++++++++++%7C+View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
++++++++++++++++++++//+Hide+the+nav+bar+and+status+bar
++++++++++++++++++++%7C+View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
++++++++++++++++++++%7C+View.SYSTEM_UI_FLAG_FULLSCREEN);
}|code-block|syntax|javascript|e1f22|要了解更多信息，请访问这个链接。|offset|length^0|0|0|B|2|0^^$0|$1|$2|3|4|5|6|$7|8]]]|9|@$A|B|C|D|2|E|F|R|G|@]|H|@]|6|$]]|$A|I|C|J|2|K|F|S|G|@]|H|@]|6|$L|M]]|$A|N|C|O|2|E|F|T|G|@]|H|@$P|U|Q|V|A|W]]|6|$]]]]

The following code will make your status bar along with the navigation bar transparent (note that this will make your layout a full screen layout like the layouts used in games):
<pre><code>@Override
public void onWindowFocusChanged(boolean hasFocus) {
 super.onWindowFocusChanged(hasFocus);
 if (hasFocus) {
 hideSystemUI();
 }
}

private void hideSystemUI() {
 // Enables sticky immersive mode.
 // For &quot;lean back&quot; mode, remove SYSTEM_UI_FLAG_IMMERSIVE_STICKY.
 // Or for regular immersive mode replace it with SYSTEM_UI_FLAG_IMMERSIVE
 View decorView = getWindow().getDecorView();
 decorView.setSystemUiVisibility(
 View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
 // Set the content to appear under the system bars so that the
 // content doesn't resize when the system bars hide and show.
 | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
 | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
 | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
 // Hide the nav bar and status bar
 | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
 | View.SYSTEM_UI_FLAG_FULLSCREEN);
}
</code></pre>
To learn more, visit <a href="https://developer.android.com/training/system-ui/immersive" rel="nofollow noreferrer">this</a> link.

entityMap|0|type|IMAGE|mutability|IMMUTABLE|data|imageUrl|https://ask.qcloudimg.com/http-save/actteam/0916bbc447b611b80cf9b8a47d6cdd78.png|imageAlt|1|LINK|MUTABLE|url|https://chris.banes.dev/becoming-a-master-window-fitter-lon/|blocks|key|6ckud|text|对于API+>+23，支持白天/夜间，你可以使用下面的扩展。需要理解的重要部分是android:fitsSystemWindows="true"使用填充在插图中移动(就像使用工具栏一样)。因此，将它放在根布局中是没有意义的(除了DrawerLayout，CoordinatorLayout，...它们使用自己的实现)。|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|8g881|?|atomic|b62hc|...
++++@bool/isDayMode
++++@android:color/transparent|code-block|syntax|javascript|anvm3|fun+Activity.transparentStatusBar()+{
++++if+(Build.VERSION.SDK_INT+<+Build.VERSION_CODES.R)+{
++++++++window.decorView.systemUiVisibility+=+(View.SYSTEM_UI_FLAG_LAYOUT_STABLE+or+View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN)
++++}+else+{
++++++++window.setDecorFitsSystemWindows(false)
++++}
}|evpc6|Then+call+it+like+so:|fp3hk|class+YourActivity+:+AppCompatActivity()+{
++++override+fun+onCreate(savedInstanceState:+Bundle?)+{
++++++++super.onCreate(savedInstanceState)
++++++++...
++++++++transparentStatusBar()
++++}
}|12lid|Check+these+slides+by+Chris+Banes:+Becoming+a+master+window+fitter|cvuiq|Edit:+If+you+have+problems+with+content+floating+behind+your+navigation+bar,+use|BOLD|2vl40|//+using+Insetter
binding.yourViewHere.applySystemWindowInsetsToPadding(bottom+=+true)^0|14|W|0|0|1|0|0|0|0|0|L|0|0|0|1U|Z|V|1|0|0|28|0|5|0^^$0|$1|$2|3|4|5|6|$7|8|9|-4]]|A|$2|B|4|C|6|$D|E]]]|F|@$G|H|I|J|2|K|L|1D|M|@$N|1E|O|1F|P|Q]]|R|@]|6|$]]|$G|S|I|T|2|U|L|1G|M|@]|R|@$N|1H|O|1I|G|1J]]|6|$]]|$G|V|I|W|2|X|L|1K|M|@]|R|@]|6|$Y|Z]]|$G|10|I|11|2|X|L|1L|M|@]|R|@]|6|$Y|Z]]|$G|12|I|13|2|K|L|1M|M|@$N|1N|O|1O|P|Q]]|R|@]|6|$]]|$G|14|I|15|2|X|L|1P|M|@]|R|@]|6|$Y|Z]]|$G|16|I|17|2|K|L|1Q|M|@$N|1R|O|1S|P|Q]]|R|@$N|1T|O|1U|G|1V]]|6|$]]|$G|18|I|19|2|K|L|1W|M|@$N|1X|O|1Y|P|Q]|$N|1Z|O|20|P|1A]]|R|@]|6|$]]|$G|1B|I|1C|2|X|L|21|M|@]|R|@]|6|$Y|Z]]]]

For API &gt; 23 with Day/Night support you can use the extension below. Important part to understand is that <code>android:fitsSystemWindows=&quot;true&quot;</code> uses padding to move within insets (like you would with a Toolbar). Therefore it does not make sense to place it at your root layout (except DrawerLayout, CoordinatorLayout, ... these use their own implementation).
<a href="https://i.stack.imgur.com/iPULG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iPULG.png" alt="enter image description here" /></a>
<pre class="lang-xml prettyprint-override"><code>&lt;style name=&quot;Theme.YourApp.DayNight&quot; parent=&quot;Theme.MaterialComponents.DayNight.NoActionBar&quot;&gt;
 ...
 &lt;item name=&quot;android:windowLightStatusBar&quot;&gt;@bool/isDayMode&lt;/item&gt;
 &lt;item name=&quot;android:statusBarColor&quot;&gt;@android:color/transparent&lt;/item&gt;
&lt;/style&gt;
</code></pre>
<pre class="lang-xml prettyprint-override"><code>&lt;androidx.constraintlayout.widget.ConstraintLayout
 ...&gt;

 &lt;com.google.android.material.appbar.MaterialToolbar
 ...
 android:fitsSystemWindows=&quot;true&quot;&gt;

&lt;/androidx.constraintlayout.widget.ConstraintLayout
</code></pre>
<pre class="lang-kotlin prettyprint-override"><code>fun Activity.transparentStatusBar() {
 if (Build.VERSION.SDK_INT &lt; Build.VERSION_CODES.R) {
 window.decorView.systemUiVisibility = (View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN)
 } else {
 window.setDecorFitsSystemWindows(false)
 }
}
</code></pre>
Then call it like so:
<pre class="lang-kotlin prettyprint-override"><code>class YourActivity : AppCompatActivity() {
 override fun onCreate(savedInstanceState: Bundle?) {
 super.onCreate(savedInstanceState)
 ...
 transparentStatusBar()
 }
}
</code></pre>
Check these slides by Chris Banes: <a href="https://chris.banes.dev/becoming-a-master-window-fitter-lon/" rel="nofollow noreferrer">Becoming a master window fitter</a>
Edit: If you have problems with content floating behind your navigation bar, use
<pre class="lang-kotlin prettyprint-override"><code>// using Insetter
binding.yourViewHere.applySystemWindowInsetsToPadding(bottom = true)
</code></pre>

entityMap|blocks|key|7vgj|text|下面的代码将创建一个完全透明的状态栏：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1p548|package+com.demo;

import+android.app.Activity;
import+android.graphics.Color;
import+android.os.Build;
import+android.os.Bundle;
import+android.view.View;
import+android.view.Window;
import+android.view.WindowManager;
import+androidx.appcompat.app.AppCompatActivity;

public+class+MainActivity+extends+AppCompatActivity+{

++++@Override
++++protected+void+onCreate(Bundle+savedInstanceState)+{
++++++++super.onCreate(savedInstanceState);
++++++++setContentView(R.layout.activity_main);

++++++++if+(Build.VERSION.SDK_INT+>=+19+&&+Build.VERSION.SDK_INT+<+21)+{
++++++++++++setWindowFlag(this,+WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS,+true);
++++++++}
++++++++if+(Build.VERSION.SDK_INT+>=+19)+{
++++++++++++getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE+%7C+View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
++++++++}
++++++++if+(Build.VERSION.SDK_INT+>=+21)+{
++++++++++++setWindowFlag(this,+WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS,+false);
++++++++++++getWindow().setStatusBarColor(Color.TRANSPARENT);
++++++++}
++++}

++++public+static+void+setWindowFlag(Activity+activity,+final+int+bits,+boolean+on)+{
++++++++Window+win+=+activity.getWindow();
++++++++WindowManager.LayoutParams+winParams+=+win.getAttributes();
++++++++if+(on)+{
++++++++++++winParams.flags+%7C=+bits;
++++++++}+else+{
++++++++++++winParams.flags+&=+~bits;
++++++++}
++++++++win.setAttributes(winParams);
++++}
}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

The following code will create a fully transparent status bar:
<pre><code>package com.demo;

import android.app.Activity;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 if (Build.VERSION.SDK_INT &gt;= 19 &amp;&amp; Build.VERSION.SDK_INT &lt; 21) {
 setWindowFlag(this, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, true);
 }
 if (Build.VERSION.SDK_INT &gt;= 19) {
 getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
 }
 if (Build.VERSION.SDK_INT &gt;= 21) {
 setWindowFlag(this, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, false);
 getWindow().setStatusBarColor(Color.TRANSPARENT);
 }
 }

 public static void setWindowFlag(Activity activity, final int bits, boolean on) {
 Window win = activity.getWindow();
 WindowManager.LayoutParams winParams = win.getAttributes();
 if (on) {
 winParams.flags |= bits;
 } else {
 winParams.flags &amp;= ~bits;
 }
 win.setAttributes(winParams);
 }
}
</code></pre>

I've searched the documentation but only found this:
<a href="http://developer.android.com/about/versions/android-4.4.html#UI" rel="noreferrer">Link</a>. Which is used to make the bar translucent? What I'm trying to do is to make the status bar completely transparent (as shown in the image below) and make it backwards compatible for APK&lt;19:
<img src="https://i.stack.imgur.com/xrDe1.jpg" alt="enter image description here">

My styles.xml:

<pre><code>&lt;resources xmlns:tools="http://schemas.android.com/tools"&gt;

 &lt;style name="AppTheme" parent="Theme.AppCompat.Light"&gt;
 &lt;item name="android:actionBarStyle"&gt;@style/ThemeActionBar&lt;/item&gt;
 &lt;item name="android:windowActionBarOverlay"&gt;true&lt;/item&gt;
 &lt;!-- Support library compatibility --&gt;
 &lt;item name="actionBarStyle"&gt;@style/ThemeActionBar&lt;/item&gt;
 &lt;item name="windowActionBarOverlay"&gt;true&lt;/item&gt;
 &lt;/style&gt;

 &lt;style name="ThemeActionBar" parent="Widget.AppCompat.Light.ActionBar.Solid"&gt;
 &lt;item name="android:background"&gt; @null &lt;/item&gt;
 &lt;!-- Support library compatibility --&gt;
 &lt;item name="background"&gt;@null&lt;/item&gt;
 &lt;item name="android:displayOptions"&gt; showHome | useLogo&lt;/item&gt;
 &lt;item name="displayOptions"&gt;showHome|useLogo&lt;/item&gt;

 &lt;/style&gt;

&lt;/resources&gt;
</code></pre>

What I was able to do:

<img src="https://i.stack.imgur.com/Nz7G2.jpg" alt="enter image description here">

Android Completely transparent Status Bar?

Android

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Java

我已经搜索了文档但只找到了这个：链接..。它是用来制作条的半透明什么？我要做的就是让状态栏完全透明(如下图所示)，并使其向后兼容APK<19： ? 我的styles.xml： <item name="android:actionBarStyle">@style/ThemeActionBar</item> <i...

问Android完全透明的状态栏？
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