Question

I’m trying to move A picture in android, but I really don’t find A way to do it. I used already several methods but none of them really worked, this is my code at the moment

public class Tangram extends Activity implements OnTouchListener{
ImageView img;
int x=0,y=0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.tangram);

    img = (ImageView) findViewById(R.id.tangrampic1);
    img.setOnTouchListener(this);
    img.scrollBy(x, y);
}

 public boolean onTouch(View v, MotionEvent event) 
    { 
        switch (event.getAction())
        {
            case MotionEvent.ACTION_DOWN:
            {      
                  x++;
                     break; 
            }
            case MotionEvent.ACTION_UP:
            {             
                  x--;  
                 break;
            }
        }
        return true;
    }

}

Does anybody know how to move an object?

Answer 1

I would do it the following way:
– implement your own view
– in the ondraw method of this view paint your image ( starting with offset 0/0 )
– onTouch move the offset and invalidate the view