<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
  <gradient
    android:startColor="#614385"
    android:endColor="#516395"
    android:angle="0"/>
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
  <gradient
    android:startColor="#5f2c82"
    android:endColor="#49a09d"
    android:angle="45"/>
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
  <gradient
    android:startColor="#4776E6"
    android:endColor="#8E54E9"
    android:angle="90"/>
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
  <gradient
    android:startColor="#7141e2"
    android:endColor="#d46cb3"
    android:angle="135"/>
</shape>

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android">
  <item
    android:drawable="@drawable/color1"
    android:duration="10000" />
  <item
    android:drawable="@drawable/color2"
    android:duration="10000" />
  <item
    android:drawable="@drawable/color3"
    android:duration="10000" />
  <item
    android:drawable="@drawable/color4"
    android:duration="10000" />
</animation-list>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
  android:background="@drawable/animation_list"
  android:id="@+id/container">
  <!-- Child Views -->
</LinearLayout>

LinearLayout container = (LinearLayout) findViewById(R.id.container);
AnimationDrawable anim = (AnimationDrawable) container.getBackground();
anim.setEnterFadeDuration(6000);
anim.setExitFadeDuration(2000);

// 开始播放动画：在onResume方法中开始播放渐变动画
@Override
protected void onResume() {
  super.onResume();
  if (anim != null && !anim.isRunning())
    anim.start();
}
   
// 停止播放动画：在onPause方法中停止播放渐变动画
@Override
protected void onPause() {
  super.onPause();
  if (anim != null && anim.isRunning())
    anim.stop();
}

<resources> 
  <style name="Theme.AppTheme.TranslucentStatusBar" parent="Theme.AppCompat.Light.NoActionBar" /> 
</resources>

<resources> 
  <style name="Theme.AppTheme.TranslucentStatusBar" parent="Theme.AppCompat.Light.NoActionBar"> 
    <item name="android:windowTranslucentStatus">true</item> 
  </style> 
</resources>

<resources> 
  <style name="Theme.AppTheme.TranslucentStatusBar" parent="Theme.AppCompat.Light.NoActionBar"> 
    <item name="android:statusBarColor">@android:color/transparent</item> 
  </style> 
</resources>

<resources> 
  <style name="Theme.AppTheme.TranslucentStatusBar" parent="Theme.AppCompat.Light.NoActionBar"> 
    <item name="android:statusBarColor">@android:color/transparent</item> 
    <item name="android:windowLightStatusBar">true</item> 
  </style> 
</resources>

public class MainActivity extends AppCompatActivity { 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState);  
    // 加入下面的代码
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { 
      findViewById(android.R.id.content).setSystemUiVisibility( 
          View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE); 
    } 
 
    setContentView(R.layout.activity_splash); 
  } 
} 
<activity 
  android:name=".MainActivity"  android:theme="@style/Theme.AppTheme.TranslucentStatusBar" />