Android turn off screen without restarting game -

i'm trying create android game, having problem turning off screen.

currently game works when press home button pauses , when press button stops , later starts again.

now noticed when press power button turn off screen stops game, without closing, , when turn screen on restarted. prevent , make game pause when turn off screen,

my current code:

public void surfacecreated(surfaceholder holder) {     if (!mgameisrunning) {         mgameisrunning = true;         loop = new gameloop(getholder(), this);         createsprites();         loop.setrunning(true);         loop.start();      } else {         resume();     }  }  public void surfacedestroyed(surfaceholder holder) {     pause(); }  public void pause() {     loop.setrunning(false);     while (true) {         try {             loop.join();         } catch (interruptedexception e) {         }         break;     }     loop = null; }  public void resume() {     loop = new gameloop(getholder(), this);     loop.setrunning(true);     loop.start(); } 

it application losing opengl context , has restart when re-open it. remember it, context saved time if use 'home' button, dropped when use either button or put device sleep.

you try use 'home' button , leave in background time, tests this: 'home' button -> instantly switch works. try give time context drop.

again, i'm not sure. has been while me since have done android programming.