blocks|key|544769|text|private+void+setFullscreen(boolean+fullscreen)
{
++++WindowManager.LayoutParams+attrs+=+getWindow().getAttributes();
++++if+(fullscreen)
++++{
++++++++attrs.flags+%7C=+WindowManager.LayoutParams.FLAG_FULLSCREEN;
++++}
++++else
++++{
++++++++attrs.flags+&=+~WindowManager.LayoutParams.FLAG_FULLSCREEN;
++++}
++++getWindow().setAttributes(attrs);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|544770|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>private void setFullscreen(boolean fullscreen)
{
 WindowManager.LayoutParams attrs = getWindow().getAttributes();
 if (fullscreen)
 {
 attrs.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
 }
 else
 {
 attrs.flags &amp;= ~WindowManager.LayoutParams.FLAG_FULLSCREEN;
 }
 getWindow().setAttributes(attrs);
}
</code></pre>

blocks|key|544835|text|自Jellybean+(4.1)以来，有了一种不依赖于WindowManager的新方法。与使用WindowManager标志相比，在窗口之外使用setSystemUiVisibility可以对系统栏进行更精细的控制。下面是启用全屏的方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|544836|if+(Build.VERSION.SDK_INT+<+16)+{+//ye+olde+method
++++getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
++++++++++++++++++++WindowManager.LayoutParams.FLAG_FULLSCREEN);
}+else+{+//+Jellybean+and+up,+new+hotness
++++View+decorView+=+getWindow().getDecorView();
++++//+Hide+the+status+bar.
++++int+uiOptions+=+View.SYSTEM_UI_FLAG_FULLSCREEN;
++++decorView.setSystemUiVisibility(uiOptions);
++++//+Remember+that+you+should+never+show+the+action+bar+if+the
++++//+status+bar+is+hidden,+so+hide+that+too+if+necessary.
++++ActionBar+actionBar+=+getActionBar();
++++actionBar.hide();
}|code-block|syntax|javascript|544837|下面是如何还原上面的代码：|544838|if+(Build.VERSION.SDK_INT+<+16)+{+//ye+olde+method
++++getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
}+else+{+//+Jellybean+and+up,+new+hotness
++++View+decorView+=+getWindow().getDecorView();
++++//+Hide+the+status+bar.
++++int+uiOptions+=+View.SYSTEM_UI_FLAG_VISIBLE;
++++decorView.setSystemUiVisibility(uiOptions);
++++//+Remember+that+you+should+never+show+the+action+bar+if+the
++++//+status+bar+is+hidden,+so+hide+that+too+if+necessary.
++++ActionBar+actionBar+=+getActionBar();
++++actionBar.show();
}|544839|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Since Jellybean (4.1) there is a new method that doesn't rely on the WindowManager. Instead use setSystemUiVisibility off of the Window, this gives you more granular control over the system bars than using WindowManager flags. This is how you enable fullscreen:

<pre><code>if (Build.VERSION.SDK_INT &lt; 16) { //ye olde method
 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
 WindowManager.LayoutParams.FLAG_FULLSCREEN);
} else { // Jellybean and up, new hotness
 View decorView = getWindow().getDecorView();
 // Hide the status bar.
 int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
 decorView.setSystemUiVisibility(uiOptions);
 // Remember that you should never show the action bar if the
 // status bar is hidden, so hide that too if necessary.
 ActionBar actionBar = getActionBar();
 actionBar.hide();
}
</code></pre>

And this is how you revert the above code:

<pre><code>if (Build.VERSION.SDK_INT &lt; 16) { //ye olde method
 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
} else { // Jellybean and up, new hotness
 View decorView = getWindow().getDecorView();
 // Hide the status bar.
 int uiOptions = View.SYSTEM_UI_FLAG_VISIBLE;
 decorView.setSystemUiVisibility(uiOptions);
 // Remember that you should never show the action bar if the
 // status bar is hidden, so hide that too if necessary.
 ActionBar actionBar = getActionBar();
 actionBar.show();
}
</code></pre>

blocks|key|761441|text|有一个更短的切换全屏方法的实现：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|761442|private+void+toggleFullscreen()+{
++++WindowManager.LayoutParams+attrs+=+getWindow().getAttributes();
++++attrs.flags+%5E=+WindowManager.LayoutParams.FLAG_FULLSCREEN;
++++getWindow().setAttributes(attrs);
}|code-block|syntax|javascript|761443|它使用逐位异或逻辑来切换FLAG_FULLSCREEN。|offset|length|style|CODE|761444|entityMap^0|0|0|C|F|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

There's a shorter toggle full screen method implementation:

<pre><code>private void toggleFullscreen() {
 WindowManager.LayoutParams attrs = getWindow().getAttributes();
 attrs.flags ^= WindowManager.LayoutParams.FLAG_FULLSCREEN;
 getWindow().setAttributes(attrs);
}
</code></pre>

It uses bitwise XOR logic to toggle <code>FLAG_FULLSCREEN</code>.

blocks|key|761494|text|/**
+*+toggles+fullscreen+mode
+*+ 
+*+REQUIRE:+android:configChanges="orientation%7CscreenSize"
+*+<pre>
+*+sample:
+*+++++private+boolean+fullscreen;
+*+++++................
+*+++++Activity+activity+=+(Activity)context;
+*+++++toggleFullscreen(activity,+!fullscreen);
+*+++++fullscreen+=+!fullscreen;
+*+</pre>
+*/
private+void+toggleFullscreen(Activity+activity,+boolean+fullscreen)+{
++++if+(Build.VERSION.SDK_INT+>=+11)+{
++++++++//+The+UI+options+currently+enabled+are+represented+by+a+bitfield.
++++++++//+getSystemUiVisibility()+gives+us+that+bitfield.
++++++++int+uiOptions+=+activity.getWindow().getDecorView().getSystemUiVisibility();
++++++++int+newUiOptions+=+uiOptions;
++++++++boolean+isImmersiveModeEnabled+=
++++++++++++++++((uiOptions+%7C+View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY)+==+uiOptions);
++++++++if+(isImmersiveModeEnabled)+{
++++++++++++Log.i(context.getPackageName(),+"Turning+immersive+mode+mode+off.+");
++++++++}+else+{
++++++++++++Log.i(context.getPackageName(),+"Turning+immersive+mode+mode+on.");
++++++++}

++++++++//+Navigation+bar+hiding:++Backwards+compatible+to+ICS.
++++++++if+(Build.VERSION.SDK_INT+>=+14)+{
++++++++++++newUiOptions+%5E=+View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
++++++++}

++++++++//+Status+bar+hiding:+Backwards+compatible+to+Jellybean
++++++++if+(Build.VERSION.SDK_INT+>=+16)+{
++++++++++++newUiOptions+%5E=+View.SYSTEM_UI_FLAG_FULLSCREEN;
++++++++}

++++++++//+Immersive+mode:+Backward+compatible+to+KitKat.
++++++++//+Note+that+this+flag+doesn't+do+anything+by+itself,+it+only+augments+the+behavior
++++++++//+of+HIDE_NAVIGATION+and+FLAG_FULLSCREEN.++For+the+purposes+of+this+sample
++++++++//+all+three+flags+are+being+toggled+together.
++++++++//+Note+that+there+are+two+immersive+mode+UI+flags,+one+of+which+is+referred+to+as+"sticky".
++++++++//+Sticky+immersive+mode+differs+in+that+it+makes+the+navigation+and+status+bars
++++++++//+semi-transparent,+and+the+UI+flag+does+not+get+cleared+when+the+user+interacts+with
++++++++//+the+screen.
++++++++if+(Build.VERSION.SDK_INT+>=+18)+{
++++++++++++newUiOptions+%5E=+View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
++++++++}
++++++++activity.getWindow().getDecorView().setSystemUiVisibility(newUiOptions);
++++}+else+{
++++++++//+for+android+pre+11
++++++++WindowManager.LayoutParams+attrs+=+activity.getWindow().getAttributes();
++++++++if+(fullscreen)+{
++++++++++++attrs.flags+%7C=+WindowManager.LayoutParams.FLAG_FULLSCREEN;
++++++++}+else+{
++++++++++++attrs.flags+&=+~WindowManager.LayoutParams.FLAG_FULLSCREEN;
++++++++}
++++++++activity.getWindow().setAttributes(attrs);
++++}

++++try+{
++++++++//+hide+actionbar
++++++++if+(activity+instanceof+ActionBarActivity)+{
++++++++++++if+(fullscreen)+((ActionBarActivity)+activity).getSupportActionBar().hide();
++++++++++++else+((ActionBarActivity)+activity).getSupportActionBar().show();
++++++++}+else+if+(Build.VERSION.SDK_INT+>=+11)+{
++++++++++++if+(fullscreen)+activity.getActionBar().hide();
++++++++++++else+activity.getActionBar().show();
++++++++}
++++}+catch+(Exception+e)+{
++++++++e.printStackTrace();
++++}

++++//+set+landscape
+++//+if(fullscreen)++activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
+++//+else+activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|761495|我的代码在Android2.3和4.4.2上运行良好|unstyled|761496|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>/**
 * toggles fullscreen mode
 * &lt;br/&gt;
 * REQUIRE: android:configChanges="orientation|screenSize"
 * &lt;pre&gt;
 * sample:
 * private boolean fullscreen;
 * ................
 * Activity activity = (Activity)context;
 * toggleFullscreen(activity, !fullscreen);
 * fullscreen = !fullscreen;
 * &lt;/pre&gt;
 */
private void toggleFullscreen(Activity activity, boolean fullscreen) {
 if (Build.VERSION.SDK_INT &gt;= 11) {
 // The UI options currently enabled are represented by a bitfield.
 // getSystemUiVisibility() gives us that bitfield.
 int uiOptions = activity.getWindow().getDecorView().getSystemUiVisibility();
 int newUiOptions = uiOptions;
 boolean isImmersiveModeEnabled =
 ((uiOptions | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY) == uiOptions);
 if (isImmersiveModeEnabled) {
 Log.i(context.getPackageName(), "Turning immersive mode mode off. ");
 } else {
 Log.i(context.getPackageName(), "Turning immersive mode mode on.");
 }

 // Navigation bar hiding: Backwards compatible to ICS.
 if (Build.VERSION.SDK_INT &gt;= 14) {
 newUiOptions ^= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
 }

 // Status bar hiding: Backwards compatible to Jellybean
 if (Build.VERSION.SDK_INT &gt;= 16) {
 newUiOptions ^= View.SYSTEM_UI_FLAG_FULLSCREEN;
 }

 // Immersive mode: Backward compatible to KitKat.
 // Note that this flag doesn't do anything by itself, it only augments the behavior
 // of HIDE_NAVIGATION and FLAG_FULLSCREEN. For the purposes of this sample
 // all three flags are being toggled together.
 // Note that there are two immersive mode UI flags, one of which is referred to as "sticky".
 // Sticky immersive mode differs in that it makes the navigation and status bars
 // semi-transparent, and the UI flag does not get cleared when the user interacts with
 // the screen.
 if (Build.VERSION.SDK_INT &gt;= 18) {
 newUiOptions ^= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
 }
 activity.getWindow().getDecorView().setSystemUiVisibility(newUiOptions);
 } else {
 // for android pre 11
 WindowManager.LayoutParams attrs = activity.getWindow().getAttributes();
 if (fullscreen) {
 attrs.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
 } else {
 attrs.flags &amp;= ~WindowManager.LayoutParams.FLAG_FULLSCREEN;
 }
 activity.getWindow().setAttributes(attrs);
 }

 try {
 // hide actionbar
 if (activity instanceof ActionBarActivity) {
 if (fullscreen) ((ActionBarActivity) activity).getSupportActionBar().hide();
 else ((ActionBarActivity) activity).getSupportActionBar().show();
 } else if (Build.VERSION.SDK_INT &gt;= 11) {
 if (fullscreen) activity.getActionBar().hide();
 else activity.getActionBar().show();
 }
 } catch (Exception e) {
 e.printStackTrace();
 }

 // set landscape
 // if(fullscreen) activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
 // else activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT);
}
</code></pre>

my code working fine with android 2.3 and 4.4.2

blocks|key|761567|text|Kotlin全屏解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|761568|if+(isFullscreen)+{
++++WindowInsetsControllerCompat(activity?.window!!,+root).apply+{
++++++++hide(WindowInsetsCompat.Type.systemBars())
++++++++systemBarsBehavior+=+WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
++++}
}+else+{
++++WindowInsetsControllerCompat(activity?.window!!,+root)
++++++++.show(WindowInsetsCompat.Type.systemBars())
}|code-block|syntax|javascript|761569|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Kotlin solution for the fullscreen.
<pre><code>if (isFullscreen) {
 WindowInsetsControllerCompat(activity?.window!!, root).apply {
 hide(WindowInsetsCompat.Type.systemBars())
 systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
 }
} else {
 WindowInsetsControllerCompat(activity?.window!!, root)
 .show(WindowInsetsCompat.Type.systemBars())
}
</code></pre>

I need some help toggling fullscreen mode. I have a setting in a preference screen to go fullscreen. In my main activity's onResume I have:

<pre><code>if(mFullscreen == true) {
 getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);

 } else
 {
 getWindow().addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

 }
</code></pre>

But this doesn't seem to work because it needs to be called before <code>setContentView</code> right?

... But Also, I have <code>requestWindowFeature(Window.FEATURE_NO_TITLE);</code> before <code>setContentView</code> and it takes away the title AND status bar... Can anybody offer some help?

---Edit---
Ok, I had a bug that was causing this to not work. So it actually does. Now, I just need to know how to toggle the title bar.

Toggle Fullscreen mode

Kotlin

我需要一些帮助来切换全屏模式。我在首选项屏幕中设置了全屏显示。在我的主要活动的onResume中，我有：if(mFullscreen == true) {                getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);  ...

问切换全屏模式
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