Question

I use matrix to scale a bitmap and draw it on canvas, after it’s scaled, is there a way to get the scale with of the bitmap? and it’s scale height?

sx += 0.5f;
matrix.setScale(sx, sx);
matrix.postTranslate(left, top);
canvas.drawBitmap(bitmap, matrix, paint);

// here how to get the scaled width of bitmap?

This is part of my current project – a simple meme maker, so another question is that is there any good tutorials or resource (open source app) I can learn? I googled a lot, just get some pieces no complete tutorials.

Thanks.

Answer 1

I believe

Bitmap#getScaledHeight (Canvas canvas)

should do the job. If not try with

final int scaledHeight = bitmap.getHeight() * sx;

but the first one should work.