Question

I am trying to spin a picture with a timer on touch event. I created a method which works without timer/thread. But When I use it in a timer, It doesnt work. I am not good in android programming.

———–> this is the ontouch event

@Override

public boolean onTouch(View v, MotionEvent event){

 t1=new TimerTask()
{                

 public void run()
 {                              

  angle += 40; 
  spin(angle);
  if(angle >=360)
  angle = 0;
 }
 };

t.schedule(t1,2*1000);

return false;
}});

———-> and this is my spin method

public void spin(int degree)
{
  Bitmap bMap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
  Matrix mat = new Matrix();
  mat.postRotate(degree);
  Bitmap bMapRotate = Bitmap.createBitmap(bMap, 0, 0, bMap.getWidth(), bMap.getHeight(), mat, true);
  bottle.setImageBitmap(bMapRotate);
}

Answer 1

Use android.os.Handler instead of your timer like this-

@override
public boolean onTouch(View v, MotionEvent event){
    new Handler().postDelayed(new Runnable() {

        @Override
        public void run() {
             angle += 40; 
              spin(angle);
              if(angle >=360)
              angle = 0;
        }
    }, 2*1000);
}