Android: toggle screen auto brightness temporarily

I want to disable开发者_开发问答 the automatic brightness (I want to prevent the screen from being turned off), but only when my application is active (when the Activity is running).

How should I do that?

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In your onResume(), use the PowerManager to obtain either a SCREEN_DIM_WAKE_LOCK, a SCREEN_BRIGHT_WAKE_LOCK or a FULL_WAKE_LOCK. In onPause(), release the wake lock. You will need the WAKE_LOCK permission.

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Add these to your Activity

protected void onResume() {
    // Disables power-saving
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    super.onResume();
}

public void onBackPressed() {
    // Enables power-saving
    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    super.onBackPressed();
}