Android把Bitmap保存为PNG图像文件的简单方法（同步）

 public static void saveBitmapAsPng(Bitmap bmp,File f) {        try {            FileOutputStream out = new FileOutputStream(f);            bmp.compress(Bitmap.CompressFormat.PNG, 100, out);            out.flush();            out.close();        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }