保存本地的一张图片到sd卡中

Bitmap mBitmap = BitmapFactory.decodeResource(getResources(),
R.drawable.logo);
File flle = null;
try {
OutputStream stream = null;
flle = new File("/sdcard/renrenzhanggui/dazhanggui/logo.png");
if (!flle.exists()) {
File newFile = flle.getParentFile();
newFile.mkdirs();
}
stream = new FileOutputStream(flle);
mBitmap.compress(CompressFormat.PNG, 90, stream);
stream.flush();
stream.close();
} catch (Exception e) {
e.printStackTrace();
}