Android App实现闪屏页广告图的全屏显示实例

<!-- Render on full screen up to screen aspect ratio of 2.4 -->
<!-- Use a letterbox on screens larger than 2.4 -->
<activity android:maxAspectRatio="2.4">
 ...
</activity>

<!-- Render on full screen up to screen aspect ratio of 2.4 -->
<!-- Use a letterbox on screens larger than 2.4 -->
<meta-data android:name="android.max_aspect" android:value="2.4" />

// 默认情况，全屏页面不可用刘海区域，非全屏页面可以进行使用
public static final int LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT = 0;
// 允许页面延伸到刘海区域
public static final int LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES = 1;
// 不允许使用刘海区域
public static final int LAYOUT_IN_DISPLAY_CUTOUT_MODE_NEVER = 2;

// value-v28/styles.xml
 <style name="AppTheme.Launcher" parent="AppTheme">
        <item name="android:windowBackground">@drawable/branded_launch_screens</item>
        <item name="android:statusBarColor">@color/colorPrimary</item>
        <item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
</style>

@Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (Build.VERSION.SDK_INT >= 28) {
            WindowManager.LayoutParams lp = getWindow().getAttributes();
            lp.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES;
            getWindow().setAttributes(lp);
        }
}

<!--实现启动页全屏-->
<style name="Theme.SplashActivity" parent="Theme.AppCompat.NoActionBar">
    <item name="android:windowBackground">@color/white</item>
    <item name="android:windowTranslucentStatus">false</item>
    <item name="android:statusBarColor">@android:color/transparent</item>
    <item name="colorPrimary">@color/main_bg</item>
    <item name="colorPrimaryDark">@color/white</item>
    <item name="colorAccent">@color/white</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowTranslucentNavigation">true</item>
    <item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
</style>