Set the camera focus area in Android -

following several tutorials , examples came next algorithm set camera focus on specific spot, problem camera ignores spot , performs normal overall focus instead of rect area have specified. there else missing in algorithm? has been tested on several phones android 4.0 , above, focus area api supported on these devices. note, app writing works in landscape mode only.

@override public boolean ontouchevent(final motionevent event) {     if (event.getaction() == motionevent.action_up)     {         float x = event.getx();         float y = event.gety();         float touchmajor = event.gettouchmajor();         float touchminor = event.gettouchminor();          rect touchrect = new rect((int)(x - touchmajor / 2), (int)(y - touchminor / 2), (int)(x + touchmajor / 2), (int)(y + touchminor / 2));          this.submitfocusarearect(touchrect);     } }  private void submitfocusarearect(final rect touchrect) {     camera.parameters cameraparameters = camera.getparameters();      if (cameraparameters.getmaxnumfocusareas() == 0)     {         return;     }      // convert view's width , height +/- 1000      rect focusarea = new rect();      focusarea.set(touchrect.left * 2000 / camerasurfaceview.getwidth() - 1000,                        touchrect.top * 2000 / camerasurfaceview.getheight() - 1000,                       touchrect.right * 2000 / camerasurfaceview.getwidth() - 1000,                       touchrect.bottom * 2000 / camerasurfaceview.getheight() - 1000);      // submit focus area camera      arraylist<camera.area> focusareas = new arraylist<camera.area>();     focusareas.add(new camera.area(focusarea, 1000));      cameraparameters.setfocusmode(camera.parameters.focus_mode_auto);     cameraparameters.setfocusareas(focusareas);     camera.setparameters(cameraparameters);      // start autofocus operation      camera.autofocus(this); } 

before cameraparameters.setfocusareas(focusareas);, should add this:

cameraparameters.setfocusmode(camera.parameters.focus_mode_auto);