Android Bitmap

一、裁剪

  Bitmap.createBitmap(src, x, y, width, height)

二、变换Matrix

  Matrix matrix = new Matrix();

  matrix.postRotate(angle, x, y);

  matrix.postScale(x, y);

  matrix.postTranslate(x, y);

  Bitmap.createBitmap(src, x, y, width, height, matrix, true)