blocks|key|115450|text|关于|type|unstyled|depth|inlineStyleRanges|entityRanges|data|115451|android:background="@drawable/your_image"|offset|length|style|CODE|115452|在你活动的主布局上？|115453|这样，您还可以通过将图像放置在适当的res/drawable-**dpi文件夹中，为不同的屏幕密度提供不同的图像。|115454|entityMap^0|0|0|15|0|0|I|I|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@$D|P|E|Q|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|L|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|M|$]]

What about

<code>android:background="@drawable/your_image"</code>

on the main layout of your activity?

This way you can also have different images for different screen densities by placing them in the appropriate <code>res/drawable-**dpi</code> folders.

blocks|key|115507|text|另一种选择是在可绘制文件(让我们将其命名为backgroung.jpg)中添加单个图像(不一定很大)，在ImageView的根目录下创建一个不带"src“属性的iv_background。然后在相应活动的onCreate方法中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|115508|++++/*+create+a+full+screen+window+*/
++++requestWindowFeature(Window.FEATURE_NO_TITLE);
++++getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
++++++++++++WindowManager.LayoutParams.FLAG_FULLSCREEN);
++++setContentView(R.layout.your_activity);

++++/*+adapt+the+image+to+the+size+of+the+display+*/
++++Display+display+=+getWindowManager().getDefaultDisplay();
++++Point+size+=+new+Point();
++++display.getSize(size);
++++Bitmap+bmp+=+Bitmap.createScaledBitmap(BitmapFactory.decodeResource(
++++++getResources(),R.drawable.background),size.x,size.y,true);

++++/*+fill+the+background+ImageView+with+the+resized+image+*/
++++ImageView+iv_background+=+(ImageView)+findViewById(R.id.iv_background);
++++iv_background.setImageBitmap(bmp);|code-block|syntax|javascript|115509|没有裁剪，没有许多不同大小的图像。希望它能帮上忙！|115510|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Another option is to add a single image (not necessarily big) in the drawables (let's name it backgroung.jpg), create an ImageView iv_background at the root of your xml without a "src" attribute.
Then in the onCreate method of the corresponding activity:

<pre><code> /* create a full screen window */
 requestWindowFeature(Window.FEATURE_NO_TITLE);
 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
 WindowManager.LayoutParams.FLAG_FULLSCREEN);
 setContentView(R.layout.your_activity);

 /* adapt the image to the size of the display */
 Display display = getWindowManager().getDefaultDisplay();
 Point size = new Point();
 display.getSize(size);
 Bitmap bmp = Bitmap.createScaledBitmap(BitmapFactory.decodeResource(
 getResources(),R.drawable.background),size.x,size.y,true);

 /* fill the background ImageView with the resized image */
 ImageView iv_background = (ImageView) findViewById(R.id.iv_background);
 iv_background.setImageBitmap(bmp);
</code></pre>

No cropping, no many different sized images.
Hope it helps!

blocks|key|332975|text|使用这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|332976|android:background="@drawable/your_image"|code-block|syntax|javascript|332977|在你的活动中，首先是线性的或相对的布局。|332978|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

use this

<pre><code>android:background="@drawable/your_image"
</code></pre>

in your activity very first linear or relative layout.

blocks|key|115562|text|如果您使用bg.png作为背景图像，则只需：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|115563|<RelativeLayout+xmlns:android="http://schemas.android.com/apk/res/android"
++++xmlns:tools="http://schemas.android.com/tools"
++++android:layout_width="match_parent"
++++android:layout_height="match_parent"
++++android:background="@drawable/bg"
++++tools:context=".MainActivity"+>

++++<TextView
++++++++android:layout_width="wrap_content"
++++++++android:layout_height="wrap_content"
++++++++android:layout_centerHorizontal="true"
++++++++android:layout_centerVertical="true"
++++++++android:text="@string/hello_world"/>
</RelativeLayout>|code-block|syntax|javascript|115564|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|$]]

If you have bg.png as your background image then simply:

<pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:background="@drawable/bg"
 tools:context=".MainActivity" &gt;

 &lt;TextView
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_centerHorizontal="true"
 android:layout_centerVertical="true"
 android:text="@string/hello_world"/&gt;
&lt;/RelativeLayout&gt;
</code></pre>

blocks|key|115586|text|如果你想让你的图片显示在一个透明的动作栏后面，可以在你的主题样式定义中加入以下内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|115587|<item+name="android:windowActionBarOverlay">true</item>|code-block|syntax|javascript|115588|享受吧！|115589|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If you want your image to show BEHIND a transparent Action Bar, put the following into your Theme's style definition:

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

Enjoy!

blocks|key|333021|text|工作中。你应该试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|333022|android:src="@drawable/img"|code-block|syntax|javascript|333023|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|$]]

Working. you should tryout this:

<pre><code>android:src="@drawable/img"
</code></pre>

blocks|key|115620|text|在你的Relativelayout/Linearlayout中添加android:background="@drawable/your_image"。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|115621|entityMap^0|X|15|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Add <code>android:background="@drawable/your_image"</code> inside your Relativelayout/Linearlayout
Worked.

blocks|key|333057|text|自从这篇文章发布以来已经有一段时间了，但这对我有帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|333058|可以使用嵌套布局。从一个RelativeLayout开始，将您的ImageView放在其中。|333059|将height和width设置为match_parent以填充整个屏幕。|333060|将scaleType=设置为“centreCrop”，使图像适合屏幕并且不会拉伸。|333061|然后，您可以像往常一样添加任何其他布局，如下面的LinearLayout。|333062|你可以使用android:alpha来设置图片的透明度。|333063|<RelativeLayout+
++++xmlns:android="http://schemas.android.com/apk/res/android"
++++xmlns:tools="http://schemas.android.com/tools"
++++android:layout_width="match_parent"
++++android:layout_height="match_parent">

++<ImageView
++++android:layout_width="match_parent"
++++android:layout_height="match_parent"
++++android:scaleType="centerCrop"
++++android:src="@drawable/image"
++++android:alpha="0.6"/>

++<LinearLayout
++++android:layout_width="match_parent"
++++android:layout_height="match_parent"
++++android:orientation="vertical"
++++tools:context=".MainActivity">

++++++<TextView
++++++++android:layout_width="wrap_content"
++++++++android:layout_height="wrap_content"
++++++++android:text="Hello"/>

++++++<TextView
++++++++android:layout_width="wrap_content"
++++++++android:layout_height="wrap_content"
++++++++android:text="There"/>

+++</LinearLayout>
</RelativeLayout>|code-block|syntax|javascript|333064|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|V|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|W|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|X|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|Y|8|@]|9|@]|A|$O|P]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

It's been a while since this was posted, but this helped me.

You can use nested layouts. Start with a RelativeLayout, and place your ImageView in that. 

Set height and width to match_parent to fill the screen.

Set scaleType="centreCrop" so the image fits the screen and doesn't stretch.

Then you can put in any other layouts as you normally would, like the LinearLayout below.

You can use android:alpha to set the transparency of the image.

<pre><code>&lt;RelativeLayout 
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"&gt;

 &lt;ImageView
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:scaleType="centerCrop"
 android:src="@drawable/image"
 android:alpha="0.6"/&gt;

 &lt;LinearLayout
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
 tools:context=".MainActivity"&gt;

 &lt;TextView
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="Hello"/&gt;

 &lt;TextView
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="There"/&gt;

 &lt;/LinearLayout&gt;
&lt;/RelativeLayout&gt;
</code></pre>

I see many applications that use a full-screen image as background.
This is an example:

<img src="https://i.stack.imgur.com/j1qzY.jpg" alt="Full screen background image">

I want to use this in a project, the best way I've found so far to do this is to use an image with a large size, put it in a <code>ImageView</code> and use <code>android: adjustViewBounds="true"</code> to adjust the margins

The problem is that if a screen with a very high resolution, the image falls short.

Another option I thought of is to use the image in a <code>FrameLayout</code>, with <code>match_parent</code> in <code>width</code> and <code>height</code> as background... this stretches the image, but I think the result is not very good.

How would you do it?

Full screen background image in an activity

我看到很多应用程序都使用全屏图像作为背景。这是一个示例：​​我想在项目中使用它，到目前为止，我找到的最好的方法是使用一个大尺寸的图像，将它放在ImageView中，然后使用android: adjustViewBounds="true"来调整页边距问题是，如果屏幕的分辨率非常高，图像就会变差。我想到的另一个选择是在Fr...

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