android – draw object/image on canvas-ThrowExceptions

Exception or error:

Is there another way to draw an object on a canvas in android?

This code inside draw() doesn’t work:

Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.pushpin);
canvas.drawBitmap(bmp, screenPts.x, screenPts.y-50, null);

Well actually, it’s working on my 1st code but when I’ve transfered this to another class called MarkOverlay, it’s not working anymore.

  markerOverlay = new MarkerOverlay(getApplicationContext(), p);
                      listOfOverlays.add(markerOverlay);  

What parameter should I pass to MarkerOverlay to make this code work? The error is somewhere in getResources().

FYI, canvas.drawOval is perfectly working but I really want to draw an Image not an Oval. 🙂

How to solve:
package com.canvas;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;

public class Keypaint extends View {
    Paint p;

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        p=new Paint();
        Bitmap b=BitmapFactory.decodeResource(getResources(), R.drawable.icon);
        p.setColor(Color.RED);
        canvas.drawBitmap(b, 0, 0, p);
    }

    public Keypaint(Context context) {
        super(context);
    }
}

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I prefer to do this as it only generates the image once:

public class CustomView extends View {

    private Drawable mCustomImage;

    public CustomView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mCustomImage = context.getResources().getDrawable(R.drawable.my_image);
    }

    ...

    protected void onDraw(Canvas canvas) {
        Rect imageBounds = canvas.getClipBounds();  // Adjust this for where you want it

        mCustomImage.setBounds(imageBounds);
        mCustomImage.draw(canvas);
    }
}

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