How to draw on canvas when touched

Question

I am unable to get the canvas object in ontouch().Without the canvas I cannot draw a circle when touched.How can I draw any shape or image when touched

public class Board extends View implements View.OnTouchListener {

public Board(Context context) {
    super(context);
    Paint paint1 = new Paint();
    paint1.setTextSize(50);
    paint1.setColor(Color.WHITE);

    View view=this;
    view.setOnTouchListener(this);    
}

@Override
public void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    canvas.drawRGB(200, 100, 0);

}

@Override
public boolean onTouch(View v, MotionEvent event) {
    final int action = MotionEventCompat.getActionMasked(event);
    int pointer = MotionEventCompat.getActionIndex(event);


    if (action == MotionEvent.ACTION_DOWN) {

         canvas.drawCircle(70, 1100, 50, paint1);

    }

    return false;
}

`Canvas` is not a local or global object so that you can't access it from `onTouch()` event. Either create the Canvas instance on this method OR use Global. — Riad, Jul 12 '16 at 07:22
Possible duplicate of [Draw Circle on touch](http://stackoverflow.com/questions/11796357/draw-circle-on-touch) — Bö macht Blau, Jul 12 '16 at 07:31

score 0 · Answer 1 · edited May 23 '17 at 12:14

0

To draw on canvas wherever you touch, you need a path to keep track of your touch points and path. Using the path object you can draw on canvas. See this answer Draw on touch

edited May 23 '17 at 12:14

Community

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answered Jul 12 '16 at 07:11

Sujith Niraikulathan

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How to draw on canvas when touched

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