Android studio Game speed different devices

I am making a game in Android Studio. Now my game is complete, but game speed is different on large displays...

I run my game with this timer:

if(timer == null){
  timer = new Timer();
  timer.schedule(new TimerTask() {
    @Override
    public void run() {
      if (start_flg) {
        handler.post(new Runnable() {
          @Override
          public void run() {
            changePos();
          }
        });
      }
    }
  }, 0, 20);
}

changePos() looks like this:

    public void changePos() {
SPEED_BOX =(screenHeight/280);
        
          long time = System.nanoTime();
          double delta_time = (double) ((time - last_time) / 1000000)/10;
          last_time = time;
        
          // Move Box
          if (action_flg) {
            // Touching
            boxY += SPEED_BOX*delta_time;
            box.setImageDrawable(imageBox1);
          } else {
            // Releasing
            boxY -= SPEED_BOX*delta_time;
            box.setImageDrawable(imageBox2);
          }
        
          // Check box position.
          if (boxY < 0) {
            boxY = 0;
            box.setImageDrawable(imageBox1);
          }
          if (frameWidth - boxSize < boxY) {
            boxY = frameWidth - boxSize;
            box.setImageDrawable(imageBox2);
          }
          
          box.setY(boxY);
    }

id correct that my deltaTime is allways between 1.5 to 2.9?

but every time I try it in different ways always game speed is not correct. Is it possible to make my game running same speed on different devices, different screen sizes?