Action to check whether the current activity is destroyed in Android

Enter the platform-tools directory in Android-sdk

Execute the following command in the command line

adb shell dumpsys activity>

The current four components can be used

(Activity,Service,BroadCase,ContentProvider)

Print the existence of the file in the current directory

Then go to the print file search:

ACTIVITY MANAGER ACTIVITIES (dumpsys activity activities)

Supplementary knowledge:Solution to the problem that the previous activity was destroyed when another activity was opened

In development, an Activity needs to be displayed in full screen by default. So after starting Activity in an Activity, it returns and finds that the previous Activity has been destroyed and data will be requested again.

The way to set the horizontal screen here is to configure it in:

<style name="FullScreenTheme" parent="AppTheme" >
 <item name="android:windowNoTitle">true</item>
 <item name="android:windowFullscreen">true</item>
</style>

Solution:

Instead of using the above configuration method, the onCreate method of the Activity that requires full screen display in horizontal screen

setContentView(.activity_main)Call the following code before the method to set full screen
//Remove titlerequestWindowFeature(Window.FEATURE_NO_TITLE);

//Remove the status bar on the ActivitygetWindow().setFlags(.FLAG_FULLSCREEN,
    .FLAG_FULLSCREEN);

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