Android12 SplashScreen makes the default splash screen page transparent

android12 default splash screen page transparent

Two ways:

1. App entry activity theme theme add the following items

    <!-- 闪屏页透明 跳转该activity相当于弹出dialog(悬浮窗口) -->
    <item name="android:windowIsTranslucent">true</item>

Note:

• Add the above item to the style of the entry activity in styles.xml to make the splash screen transparent
• After adding this attribute, there will be side effects: When A activity jumps to the B application (entry activity) with this attribute added, B application will be displayed on top of A activity in the form of a floating pop-up dialog, and A activity will go onPause() , will not go onStop()
• Determine whether diolog will affect the current activity life cycle:
  1. The dialog popped up by the activity itself will not go through the life cycle
  2. The pop-up theme is that the activity of the dialog will use the onPause() method, not onStop()

2. Framework layer: hide it or set the transparency to 0 when adding a splash screen view

+++ b/frameworks/base/libs/WindowManager/Shell/src/com/android/wm/shell/startingsurface/StartingSurfaceDrawer.java
@@ -320,6 +320,12 @@ public class StartingSurfaceDrawer {
    
    
                 // if view == null then creation of content view was failed.
                 if (contentView != null) {
    
    
                     try {
    
    
+                        if (activityInfo.packageName.equals("com.demo.demo")){
    
    
+                            contentView.setAlpha(0.0F);
+                            contentView.setVisibility(View.INVISIBLE);
+                        }
                         rootLayout.addView(contentView);
                     } catch (RuntimeException e) {
    
    
                         Slog.w(TAG, "failed set content view to starting window "