[ACCEPTED]-Android Scaling Canvas Bitmap-android-canvas
Accepted answer
canvas.drawBitmap(out, null, thumbnailRectF, thumbCanvasPaint);
should change to
canvas.drawBitmap(out, new Rect(0,0,mBitmap.getWidht, mBitmap.getheight), thumbnailRectF, thumbCanvasPaint);
There is no need for
Bitmap out = Bitmap.createScaledBitmap(mBitmap, (int) thumbWidth, (int)....
Also 2 check that mScaled is true all the time 1 when zoom is greater than 1
Scale bitmap by Bitmap.createScaledBitmap then draw will not work
The 5 solution for scale the canvas bitmap is 4 use this function (from the docs)
void drawBitmap (Bitmap bitmap, Rect src, Rect dst, Paint paint)
// dst : Rect: The rectangle that the bitmap will be scaled/translated to fit into
so by changing 3 the size of dst, your bitmap size will change
Here 2 is example if I want to draw a bitmap at 1 top-left and scale it to 100px x 120px
Bitmap bitmap = BitmapFactory.decodeResource(...);//bitmap to be drawn
float left = 0;
float top = 0;
RectF dst = new RectF(left, top, left + 100, top + 120); // width=100, height=120
canvas.drawBitmap(bitmap, null, dst, null);
Source:
stackoverflow.com
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