for (int i = 0; i < event.values.length; i++) {
         // ...
         if(i==2 && (event.values[i] >= 20 && event.values[i] <= 40))
         {
             //tilted left
             Log.i("left","true");
             iv.setImageResource(R.drawable.left);
         }
         else if(i==2 && (event.values[i] <= -20 && event.values[i] >= -40))
         {
             //tilted right
             Log.i("right","true");
             iv.setImageResource(R.drawable.right);
         }
         else if(i==2 && ((event.values[i] >= -5) && (event.values[i] <= 5)))
         {
             iv.setImageResource(R.drawable.center);
         }
         else if(i==2 && (event.values[i] >= 41))
         {
             iv.setImageResource(R.drawable.leftlay);
         }
         else if(i==2 && event.values[i] <= -41)
         {
             iv.setImageResource(R.drawable.rightlay);
         }