急急急！！一个更新数据对象的问题

大家帮忙一下代码，为什么按文档这样写数据上传不上去，AVOSCloud.initialize(Information.this,
"yme31y33jhtn5gck3qw3fte7rvo79uny5wogbttlvp3xzpqd",
"3uu4cwmch217nq0747xk84rb9cz8u8f1ve551pqvu4w3thu8");
objectId = getIntent().getStringExtra("objectId");
nameEditText = (EditText) findViewById(R.id.name_edit);
ageEditText = (EditText) findViewById(R.id.age_edit);
schoolEditText = (EditText) findViewById(R.id.school_edit);
signEditText = (EditText) findViewById(R.id.sign_edit);
nextButton = (Button) findViewById(R.id.next_button);
manRadioButton = (RadioButton) findViewById(R.id.man_radio);
womenRadioButton = (RadioButton) findViewById(R.id.women_radio);

	// 下一步按钮上传信息

	String tableName = "_User";
	AVObject information = new AVObject(tableName);
	AVQuery<AVObject> query = new AVQuery<AVObject>(tableName);
	information.put("school", "xr");
	try {
		information=query.get("54f70afde4b00e6414f7233c");
	} catch (AVException e1) {
		e1.printStackTrace();
	}
	information.saveInBackground(new SaveCallback() {
		@Override
		public void done(AVException e) {
			if (e == null) {
				Log.i("LeanCloud", "Save successfully.");
			} else {
				Log.e("LeanCloud", "Save failed.");
			}
		}
	});

而且报出NetWorkOnMainThreadException这样的错误