how to rotate a bitmap 90 degrees

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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);

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