File f = new File("/sdcard/DCIM/Camera/0.png");                       FileOutputStream fos = null;                       try {                           fos = new FileOutputStream(f);                           drawBitmap.compress(Bitmap.CompressFormat.PNG, 50, fos);                       } catch (FileNotFoundException e) {                           // TODO Auto-generated catch block                           e.printStackTrace();                       }

 

参考：http://wuxiaolong.me/2015/04/23/CanvasToPhoto/