Canvas drawBitmap not displays bitmap

Question

I have a custom view and inside onDraw() I'm trying to draw specific bitmap which is created from drawable resource. I'm calling canvas.drawBitmap(bitmap,null, dstRect, null) which must draw this bitmap into the specified dstRect region but it doesn't display anything. If I call canvas.drawRect(dstRect,paint) it draws rectangle with no problem and it is how it looks like

override fun onDraw(canvas: Canvas?) {
    super.onDraw(canvas)
    canvas.drawColor(Color.BLUE)
    canvas.drawRect(dstRect,paint)
    canvas.drawBitmap(bitmap, null, dstRect, null)
}

I have also checked and bitmap is created correctly. Source bitmap is 385x389 PNG image 60 KB

If I remove canvas.drawRect(dstRect,paint) than only blue screen is showing

Answer 1

Try the following

Bitmap bitmap = BitmapFactory.decodeResource(
                    mResources,
                    R.drawable.your_bitmap
               );

// Initialize a new Bitmap to hold the source bitmap
Bitmap dstBitmap = Bitmap.createBitmap(
                    dstRect.getRight() - dstRect.getLeft, // Width
                    dstRect.getBottom() - dstRect.getTop(), // Height
                    Bitmap.Config.ARGB_8888 // Config
            );

// Initialize a new Canvas instance
Canvas canvas = new Canvas(dstBitmap);
canvas.drawColor(Color.BLUE);

canvas.drawBitmap(bitmap, // Bitmap
                   0, // Left offset
                   0, // Top offset
                   null // Paint);