Question

更改数据后，我无法更新片段。我打电话给

getFragmentManager（）的BeginTransaction（）分离（本）.attach（本）.commit（）;

但是onCreateView没有被调用。我在refreshFragment（）中尝试了几种不同的方法。在我输入上面的代码行之后，我确实看到了“I / InjectionManager：dispatchCreateOptionsMenu”的消息，所以发生了一些事情，但onCreateView（）没有被调用。

 

public class MainActivityFragment extends Fragment {
private static Logger logger = Logger.getLogger(MainActivityFragment.class);
String poolWord = "ABCDE";
String newWord = "";

public MainActivityFragment() {
}

@Override
public void onCreate(Bundle savedInstanceState) {
    logger.info("onCreate------------------------");
    super.onCreate(savedInstanceState);
    setHasOptionsMenu(true);

 }

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    logger.info("onCreateView------------------------");
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_main, container, false);

    GridView gridViewPool = (GridView) view.findViewById(R.id.gridviewPool);
    gridViewPool.setAdapter(new LetterImageAdapter(getActivity(), poolWord));
    gridViewPool.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            logger.error("po    " + position);
            updateWords(position);
            refreshFragment();
        }
    });
    GridView gridviewNewWord = (GridView) view.findViewById(R.id.gridviewNewWord);
    gridviewNewWord.setAdapter(new LetterImageAdapter(getActivity(), ""));
    return view;
}

private void refreshFragment() {
    logger.info("refreshFragment------------------------");
       getFragmentManager().beginTransaction().detach(this).attach(this).commit();
    // getFragmentManager().beginTransaction().replace(R.id.fragment, this).attach(this).commit();
    // Fragment fragment = getFragmentManager().findFragmentById(R.id.fragment);
    //getFragmentManager().beginTransaction().detach(fragment).attach(fragment).commit();

    getFragmentManager().executePendingTransactions();
}

public class MainActivityFragment extends Fragment {
private static Logger logger = Logger.getLogger(MainActivityFragment.class);
String poolWord = "ABCDE";
String newWord = "";

public MainActivityFragment() {
}

@Override
public void onCreate(Bundle savedInstanceState) {
    logger.info("onCreate------------------------");
    super.onCreate(savedInstanceState);
    setHasOptionsMenu(true);

 }

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    logger.info("onCreateView------------------------");
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_main, container, false);

    GridView gridViewPool = (GridView) view.findViewById(R.id.gridviewPool);
    gridViewPool.setAdapter(new LetterImageAdapter(getActivity(), poolWord));
    gridViewPool.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            logger.error("po    " + position);
            updateWords(position);
            refreshFragment();
        }
    });
    GridView gridviewNewWord = (GridView) view.findViewById(R.id.gridviewNewWord);
    gridviewNewWord.setAdapter(new LetterImageAdapter(getActivity(), ""));
    return view;
}

private void refreshFragment() {
    logger.info("refreshFragment------------------------");
       getFragmentManager().beginTransaction().detach(this).attach(this).commit();
    // getFragmentManager().beginTransaction().replace(R.id.fragment, this).attach(this).commit();
    // Fragment fragment = getFragmentManager().findFragmentById(R.id.fragment);
    //getFragmentManager().beginTransaction().detach(fragment).attach(fragment).commit();

    getFragmentManager().executePendingTransactions();
}

Answer 1

几个小时后，我开始工作了。不确定所有细节，因为这是我的第一个android项目。发布答案以防其他人遇到同样的问题。

我怀疑，问题的症结在于Intellij生成的代码没有在Activity类中启动事务。它不包括

vec

我不确定如何在没有这个的情况下创建我的MainActivityFragment，但它确实是。我还用生成的一个教程替换了生成的activity-main.xml。来自Intellij的那个没有我可以用于容器对象的android：id。它还包含了我目前不需要的其他东西。新的activity-main.xml看起来像这样：

 if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction()
                .add(R.id.container, new MainActivityFragment())
                .commit();
    }

旧的生成的是：

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:tools="http://schemas.android.com/tools" android:id="@+id/container"
         android:layout_width="match_parent" android:layout_height="match_parent"
         tools:context=".MainActivity" tools:ignore="MergeRootFrame"/>

还有一个我摆脱的content-main.xml。这可能是android用于在没有显式代码的情况下生成MainActivityFragment的内容。更有经验的android开发者可能能够回答这个问题。

<android.support.design.widget.AppBarLayout
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay"/>

</android.support.design.widget.AppBarLayout>

<include layout="@layout/content_main"/>

</android.support.design.widget.CoordinatorLayout>

我确信有一些有用的东西我可以回去但是现在我想要简单。我还必须进行一些更改，以便为Fragment和Transaction类使用android.support.v4.app包。这有点像进入电影中间并弄清楚情节是什么。一旦我看完整部电影，我相信它会变得更加清晰。

android - 片段onCreateView在更新和提交事务后未调用

1 个答案: