Question

i want to get pixel value when i touch my screen. its in a class which extends a surfaceview

@Override
    public boolean onTouchEvent(MotionEvent event) {

        float x = event.getX();
        float y = event.getY();

        if(event.getAction()==MotionEvent.ACTION_MOVE)
        {View v =this;
        ImageView imageView = ((ImageView)v);
        Bitmap bitmap = ((BitmapDrawable)imageView.getDrawable()).getBitmap();
        int pixel = bitmap.getPixel((int)x,(int)y);


        }

i am getting class cast exception error in

ImageView imageView = ((ImageView)v);

what i done wrong here. plz help

Answer 1

What is “this”, is it a reference to an ImageView ?

Which class is this code ? An Activity class ?

You need to provide more peace of code to we help you.

Probably “this” is an Activity context reference and you can’t cast it to an ImageView.

try it

ImageView imageView = (ImageView)findViewById(R.id.XXXX)

where XXXX is your ImageView ID

Addition

        for (View objView : this.getTouchables()){
        if (objView instanceof ImageView){
            ImageView imageView = (ImageView)objView;
            //...
        }
    }

You can do this if your surfaceView only has one ImageView on it. If you have more than one, you’ll probably need extra informations about it like it’s id/tag.