Android设置手机壁纸（WallPaper）

/**
* Andorid设置手机屏幕的壁纸
*
* @description：
* @author ldm
* @date 2019-5-4 下午3:08:56
*/
public class SetWallpaperActivity extends Activity {
// WallpaperManager类：系统壁纸管理。通过它可以获得当前壁纸以及设置指定图片作为系统壁纸。
private WallpaperManager wallpaperManager;
// 壁纸对应的Drawable
private Drawable wallpaperDrawable;
// 展示样式的ImageView
private ImageView imageView;
// 随机生成图片的颜色 Button
private Button randomize;
// 设置壁纸
private Button setWallpaper;
// 暂定的一些颜色值
final static private int[] mColors = { Color.BLUE, Color.GREEN, Color.RED,
Color.LTGRAY, Color.MAGENTA, Color.CYAN, Color.YELLOW, Color.WHITE };

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.set_wallpaper);
// 初始化WallpaperManager
wallpaperManager = WallpaperManager.getInstance(this);
wallpaperDrawable = wallpaperManager.getDrawable();// 获得当前系统的壁纸
initViews();
initListeners();
}

private void initListeners() {
randomize.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
int mColor = (int) Math.floor(Math.random() * mColors.length);
// 给当前系统壁纸设置颜色
wallpaperDrawable.setColorFilter(mColors[mColor],
PorterDuff.Mode.MULTIPLY);// 取两层绘制交集
imageView.setImageDrawable(wallpaperDrawable);
// imageView.invalidate();
}
});

setWallpaper.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
try {
// 设置壁纸
wallpaperManager.setBitmap(imageView.getDrawingCache());
finish();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}

private void initViews() {
imageView = (ImageView) findViewById(R.id.imageview);
imageView.setDrawingCacheEnabled(true);
imageView.setImageDrawable(wallpaperDrawable);
randomize = (Button) findViewById(R.id.randomize);
setWallpaper = (Button) findViewById(R.id.setwallpaper);
}
}

<?xml version=”1.0″ encoding=”utf-8″?>
<FrameLayout
xmlns:android=”http://schemas.android.com/apk/res/android”
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”>
<ImageView
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”
android:id=”@+id/imageview” />
<LinearLayout
android:orientation=”horizontal”
android:layout_width=”wrap_content”
android:layout_height=”match_parent”>
<Button
android:id=”@+id/randomize”
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”
android:text=”@string/randomize”
android:layout_gravity=”bottom” />
<Button
android:id=”@+id/setwallpaper”
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”
android:text=”@string/set_wallpaper”
android:layout_gravity=”bottom” />
</LinearLayout>
</FrameLayout>