how to rotate a bitmap 90 degrees

Question

There is a statement in android canvas.drawBitmap(visiblePage, 0, 0, paint);

When I add canvas.rotate(90), there is no effect. But if I write

canvas.rotate(90) canvas.drawBitmap(visiblePage, 0, 0, paint); 

I get no bitmap drawn. So what am I not doing right?

Answer 1

You can also try this one

Matrix matrix = new Matrix();  matrix.postRotate(90);  Bitmap scaledBitmap = Bitmap.createScaledBitmap(bitmapOrg, width, height, true);  Bitmap rotatedBitmap = Bitmap.createBitmap(scaledBitmap, 0, 0, scaledBitmap.getWidth(), scaledBitmap.getHeight(), matrix, true); 

Then you can use the rotated image to set in your imageview through

imageView.setImageBitmap(rotatedBitmap);