Implementation code of exit confirmation box in Android
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Android
This is achieved by blocking and rewriting the operation of the fallback key: when the fallback key is pressed, a prompt box will pop up to select whether to exit. If yes, the exit code will be executed, otherwise nothing will be done.
Rewrite in mianactivity:
By adding this code to an Android program, you can get the final fallback key, as shown in the figure:
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