Connect android screen

Question

Next, I have a BroadCast and I want when it runs the screen of the mobile phone to be turned on! The phone will probably be in Sleep, so I want him to turn on the screen of the device! I think it’s simple, but I’m not finding a solution!

Answer 1

The solution is the BroadcastReceiver call a Activity which when displayed will cause the screen to be switched on and, if necessary, unlocked (Unlocked). This is done as follows:

public class MeuReceiver extends BroadcastReceiver {

    public void onReceive(Context context, Intent intent) {

        Intent intentParaIniciarAtividade = new Intent(context, MinhaAtividade.class);
        intentParaIniciarAtividade.putBoolean(MinhaAtividade.EXTRA_LIGAR_E_DESTRAVAR_TELA, true);
        context.startActivity(intentParaIniciarAtividade);
    }
}

My activity.java:

public class MinhaAtividade extends Activity {

    public static final String EXTRA_LIGAR_E_DESTRAVAR_TELA = MinhaAtividade.class.getPackage().getName() + ".LIGAR_E_DESTRAVAR_TELA";

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.layout_minha_atividade);

        if (true == getIntent().getBoolean(EXTRA_LIGAR_E_DESTRAVAR_TELA, false)) {
            // Combinando duas flags: FLAG_TURN_SCREEN_ON e FLAG_DISMISS_KEYGUARD.
            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON | WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
        }
    }
}

Flags that can be combined in this case, depending on the situation:

To unlock the screen: http://developer.android.com/reference/android/view/WindowManager.LayoutParams.html#FLAG_DISMISS_KEYGUARD

To display the Activity in front of the locked screen but without removing the lock: http://developer.android.com/reference/android/view/WindowManager.LayoutParams.html#FLAG_SHOW_WHEN_LOCKED

To turn on the screen lighting: http://developer.android.com/reference/android/view/WindowManager.LayoutParams.html#FLAG_TURN_SCREEN_ON

To keep the screen on: http://developer.android.com/reference/android/view/WindowManager.LayoutParams.html#FLAG_KEEP_SCREEN_ON

Important remark: For flags to work, the window that the Activity displays should be a window that occupies the whole screen (full screen) and find yourself at the top of other activities.

(Extracted information of that reply in Soen).

Answer 2

The Intent that is fired by android is ACTION_SCREEN_ON.

However, you cannot register an Intent filter in your manifest for this Intent. You need to register programmatically using the registerReceiver method().

Answer 3

Just making a correction, to keep the screen on you would use the flag FLAG_ALLOW_LOCK_WHILE_SCREEN_ON