问题:

I would like to know is there a way to get events while displaying a System dialog (Such task manager, shut down alert,...).

I can close the system dialogs from my activity through intent like below

Intent closeDialog = new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
        sendBroadcast(closeDialog);

But in my code I need to know a system dialog is shown over the screen (They can be Task manager/ Shut down dialog ...), so that I can invoke the above code for closing it.

I searched for intent filters nothing found.

回答1:

put below method in your Actvity and check recent app dialog close automatically.

public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);

        Log.e("Focus debug", "Focus changed !");

        if (!hasFocus) {
            Log.e("Focus debug", "Lost focus !");

            Intent closeDialog = new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
            sendBroadcast(closeDialog);
        }
    }

Note: it only work for single Activity. not for all activity in your app.

回答2:

Use Broadcast-Receiver and place intent inside onreceive() method.Then register this receiver where you display your alert dialog. Then it automatically disable settings,recent apps button ----Nagesh