Question

I am facing problme in rotating image

Following code works fine

Matrix matrix = new Matrix();
matrix.postRotate(DEGREE,mBitmap.getWidth() / 2, mBitmap.getHeight() / 2);
Bitmap m = Bitmap.createBitmap(mBitmap, 0, 0, mBitmap.getWidth(),mBitmap.getHeight(), matrix, true);
canvas.drawBitmap(m, mX, mY, null);

But I dont want to create a new bitmap again and again so I am using the following code

Matrix matrix = new Matrix();
matrix.postTranslate(mX, mY);
matrix.postRotate(DEGREE,mBitmap.getWidth() / 2, mBitmap.getHeight() / 2);
canvas.drawBitmap(mBitmap, matrix, null);

In that case image goes out of the view. It is not visible.

Answer 1

Matrix matrix = new Matrix();
canvas.translate(mX, mY);
canvas.drawBitmap(...);
canvas.translate(-mX, -mY);