安卓中onActivityResult方法无法获取返回的resultCode和data问题，求解

Question

                A:MainActivity   B:LoginActivity   RESULT_OK=2

具体代码如下：
MainActivity.this.startActivityForResult(new Intent(MainActivity.this,LoginActivity.class), ConnUtil.RESULT_OK);

        Intent intent=new Intent();
        intent.putExtra("uNumer", uNumer);
        LoginActivity.this.setResult(ConnUtil.RESULT_OK, intent);
        LoginActivity.this.finish();

        @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    if (resultCode==ConnUtil.RESULT_OK) {//取出的resultCode为0，data 为空
        String uNumer=data.getStringExtra("uNumer");
    }
    super.onActivityResult(requestCode, resultCode, data);
}


<activity
        android:name="com.example.activity.MainActivity"
        android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>

            <activity
        android:name="com.example.activity.LoginActivity"
        android:label="@string/title_activity_login">
    </activity>

Answer 1

http://blog.csdn.net/buaaroid/article/details/50108239