DialogFragment（AlertDialog）中的Android-ListFragment:Fragment没有视图

我正在尝试创建一个DialogFragment，其中嵌套了一个ListFragment。 我正在使用4.2.2中添加的嵌套片段 我将它与支持库一起使用，所以我的api版本应该无关紧要（请注意，我的操作系统版本也是4.2.2）

我正在尝试添加的listfragment现在只显示字符串，因为我正在尝试添加它，在我这样做之后，列表将有图像等等。。因此，请告诉我，将字符串列表传递给对话框的任何想法对我都不好，我的列表将更加复杂。。 另外，我正在尝试将此片段重新用于平板电脑模式。列表应始终以该模式显示。因此，重用非常重要

我的问题是，当我试图将listfragment添加到对话框的FrameLayout时，找不到它：

java.lang.IllegalStateException:片段在处没有视图 android.support.v4.app.Fragment$1.findViewById（Fragment.java:1425） 在 FragmentManagerImpl.moveToState（FragmentManager.java:901） 在 FragmentManagerImpl.moveToState（FragmentManager.java:1088） 在 android.support.v4.app.BackStackRecord.run（BackStackRecord.java:682） 在 FragmentManagerImpl.execPendingActions（FragmentManager.java:1444） 位于android.support.v4.app.Fragment.performStart（Fragment.java:1481） 在 FragmentManagerImpl.moveToState（FragmentManager.java:941） 在 FragmentManagerImpl.moveToState（FragmentManager.java:1088） 在 android.support.v4.app.BackStackRecord.run（BackStackRecord.java:682） 在 FragmentManagerImpl.execPendingActions（FragmentManager.java:1444） 在 FragmentManagerImpl$1.run（FragmentManager.java:429） 位于android.os.Handler.handleCallback（Handler.java:725） dispatchMessage（Handler.java:92）位于 Looper.loop（Looper.java:137）位于 android.app.ActivityThread.main（ActivityThread.java:5041）位于 java.lang.reflect.Method.Invokenactive（本机方法）位于 java.lang.reflect.Method.invoke（Method.java:511）位于 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run（ZygoteInit.java:793） 位于com.android.internal.os.ZygoteInit.main（ZygoteInit.java:560） dalvik.system.NativeStart.main（本机方法）

添加： 也许这些新信息很重要， 对话框片段显示在SupportMapFragment中。 当我尝试在SupportMapFragment中显示ListFragment时，它是有效的。 另外，当我试图在SupportMapFragment中只显示DialogFragment时，它也可以工作

就在我试图在DialogFragment中显示ListFragment时，它失败了。 看起来是这样的： FragmentActivity->SupportMapFragment->DialogFragment->ListFragment

SupportMapFragment中DialogFragment的显示如下所示：

// DialogFragment.show() will take care of adding the fragment
// in a transaction.  We also want to remove any currently showing
// dialog, so make our own transaction and take care of that here.
FragmentTransaction ft = getChildFragmentManager().beginTransaction();
SherlockDialogFragment prev =(SherlockDialogFragment)getChildFragmentManager().findFragmentByTag("dialog");
if (prev != null) {
    ft.remove(prev);
}
ft.addToBackStack(null);

// Create and show the dialog.
SherlockDialogFragment newFragment = new CategoriesDialogFragment();
newFragment.show(ft, "dialog");

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_categories_dialog_fragment, container, false);

    // And so on...
    getDialog().setTitle("");

    FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
    SherlockListFragment listCategoriesFragment = new CategoriesListFragment();
    transaction.add(R.id.fragment_list_categories, listCategoriesFragment, "fragment_list_categories").commit();

    return view;
}

请帮忙：-）

---

我的DialogFragment类是这样的：

public class CategoriesDialogFragment extends SherlockDialogFragment {

// {{ Events

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    LayoutInflater inflater = getSherlockActivity().getLayoutInflater();
    View dialogView = inflater.inflate(R.layout.fragment_categories_dialog_fragment, null, false);

    Dialog diag = new AlertDialog.Builder(getSherlockActivity())
            .setTitle("Hello")
            .setCancelable(false)
            .setView(dialogView)
            .setPositiveButton("ok",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {                          

                    }
                }
            )
            .setNegativeButton("Cancel",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {

                    }
                }
            )
            .create();

    FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
    SherlockDialogFragment prev = (SherlockDialogFragment)getChildFragmentManager().findFragmentByTag("fragment_list_categories");
    if (prev != null) {
        transaction.remove(prev);
    }

    SherlockListFragment listCategoriesFragment = new CategoriesListFragment();
    transaction.add(R.id.fragment_list_categories, listCategoriesFragment, "fragment_list_categories").commit();

    return diag;
}
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView 
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:text="sjrdflksjlksjfkldsjflkjsdflksd"/>
<FrameLayout
    android:id="@+id/fragment_list_categories"
    android:layout_width="wrap_content"
    android:layout_height="match_parent" />
</LinearLayout>

public class CategoriesListFragment extends SherlockListFragment {
public static final String[] TITLES = 
    {
            "Henry IV (1)",   
            "Henry V",
            "Henry VIII",       
            "Richard II",
            "Richard III",
            "Merchant of Venice",  
            "Othello",
            "King Lear"
    };

// {{ Events

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    Log.w("ListFragment", "insideeeeeeeeeeeeeeeeeeeee");
    super.onActivityCreated(savedInstanceState);
    setListAdapter(new ArrayAdapter<String>(getSherlockActivity(),
            android.R.layout.simple_list_item_1, TITLES));

    // setHasOptionsMenu(true);
}

@Override
public void onListItemClick(ListView l, View v, int position, long id) {
    // TODO: Kazaz - implement category pressed
    super.onListItemClick(l, v, position, id);
}

// }}
}

我的对话框布局如下：

public class CategoriesDialogFragment extends SherlockDialogFragment {

// {{ Events

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    LayoutInflater inflater = getSherlockActivity().getLayoutInflater();
    View dialogView = inflater.inflate(R.layout.fragment_categories_dialog_fragment, null, false);

    Dialog diag = new AlertDialog.Builder(getSherlockActivity())
            .setTitle("Hello")
            .setCancelable(false)
            .setView(dialogView)
            .setPositiveButton("ok",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {                          

                    }
                }
            )
            .setNegativeButton("Cancel",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {

                    }
                }
            )
            .create();

    FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
    SherlockDialogFragment prev = (SherlockDialogFragment)getChildFragmentManager().findFragmentByTag("fragment_list_categories");
    if (prev != null) {
        transaction.remove(prev);
    }

    SherlockListFragment listCategoriesFragment = new CategoriesListFragment();
    transaction.add(R.id.fragment_list_categories, listCategoriesFragment, "fragment_list_categories").commit();

    return diag;
}
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView 
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:text="sjrdflksjlksjfkldsjflkjsdflksd"/>
<FrameLayout
    android:id="@+id/fragment_list_categories"
    android:layout_width="wrap_content"
    android:layout_height="match_parent" />
</LinearLayout>

public class CategoriesListFragment extends SherlockListFragment {
public static final String[] TITLES = 
    {
            "Henry IV (1)",   
            "Henry V",
            "Henry VIII",       
            "Richard II",
            "Richard III",
            "Merchant of Venice",  
            "Othello",
            "King Lear"
    };

// {{ Events

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    Log.w("ListFragment", "insideeeeeeeeeeeeeeeeeeeee");
    super.onActivityCreated(savedInstanceState);
    setListAdapter(new ArrayAdapter<String>(getSherlockActivity(),
            android.R.layout.simple_list_item_1, TITLES));

    // setHasOptionsMenu(true);
}

@Override
public void onListItemClick(ListView l, View v, int position, long id) {
    // TODO: Kazaz - implement category pressed
    super.onListItemClick(l, v, position, id);
}

// }}
}

我的ListFragment类是：

public class CategoriesDialogFragment extends SherlockDialogFragment {

// {{ Events

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    LayoutInflater inflater = getSherlockActivity().getLayoutInflater();
    View dialogView = inflater.inflate(R.layout.fragment_categories_dialog_fragment, null, false);

    Dialog diag = new AlertDialog.Builder(getSherlockActivity())
            .setTitle("Hello")
            .setCancelable(false)
            .setView(dialogView)
            .setPositiveButton("ok",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {                          

                    }
                }
            )
            .setNegativeButton("Cancel",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {

                    }
                }
            )
            .create();

    FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
    SherlockDialogFragment prev = (SherlockDialogFragment)getChildFragmentManager().findFragmentByTag("fragment_list_categories");
    if (prev != null) {
        transaction.remove(prev);
    }

    SherlockListFragment listCategoriesFragment = new CategoriesListFragment();
    transaction.add(R.id.fragment_list_categories, listCategoriesFragment, "fragment_list_categories").commit();

    return diag;
}
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView 
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:text="sjrdflksjlksjfkldsjflkjsdflksd"/>
<FrameLayout
    android:id="@+id/fragment_list_categories"
    android:layout_width="wrap_content"
    android:layout_height="match_parent" />
</LinearLayout>

public class CategoriesListFragment extends SherlockListFragment {
public static final String[] TITLES = 
    {
            "Henry IV (1)",   
            "Henry V",
            "Henry VIII",       
            "Richard II",
            "Richard III",
            "Merchant of Venice",  
            "Othello",
            "King Lear"
    };

// {{ Events

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    Log.w("ListFragment", "insideeeeeeeeeeeeeeeeeeeee");
    super.onActivityCreated(savedInstanceState);
    setListAdapter(new ArrayAdapter<String>(getSherlockActivity(),
            android.R.layout.simple_list_item_1, TITLES));

    // setHasOptionsMenu(true);
}

@Override
public void onListItemClick(ListView l, View v, int position, long id) {
    // TODO: Kazaz - implement category pressed
    super.onListItemClick(l, v, position, id);
}

// }}
}

公共类CategoriesListFragment扩展了SherlockListFragment{
公共静态最终字符串[]标题=
{
“亨利四世（1）”，
“亨利五世”，
“亨利八世”，
“理查德二世”，
“理查三世”，
“威尼斯商人”，
“奥赛罗”，
“李尔王”
};
//{{事件
@凌驾
已创建ActivityState上的公共无效（Bundle savedInstanceState）{
w（“ListFragment”、“Insideeeee”）；
super.onActivityCreated（savedInstanceState）；
setListAdapter（新阵列适配器）（getSherlockActivity（），
android.R.layout.simple_list_item_1，TITLES））；
//设置选项菜单（真）；
}
@凌驾
public void onListItemClick（列表视图l、视图v、整数位置、长id）{
//TODO:Kazaz-按下机具类别
super.onListItemClick（左、右、位置、id）；
}
// }}
}

尝试使用以下方法：-

getSupport（子）FragmentManager（）.beginTransaction（）.detach（MFFragment1）.replace（R.id.main，MFFragment2）.attach（MFFragment2.addToBackStack（null）.commit（）

如以下链接所述

---

不确定这是否适用于您，但可以尝试将该代码嵌套在onCreateView中。我有一个类似的问题，这对我很有效

基本上删除onCreateDialog中的内容，可能类似于：

// DialogFragment.show() will take care of adding the fragment
// in a transaction.  We also want to remove any currently showing
// dialog, so make our own transaction and take care of that here.
FragmentTransaction ft = getChildFragmentManager().beginTransaction();
SherlockDialogFragment prev =(SherlockDialogFragment)getChildFragmentManager().findFragmentByTag("dialog");
if (prev != null) {
    ft.remove(prev);
}
ft.addToBackStack(null);

// Create and show the dialog.
SherlockDialogFragment newFragment = new CategoriesDialogFragment();
newFragment.show(ft, "dialog");

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_categories_dialog_fragment, container, false);

    // And so on...
    getDialog().setTitle("");

    FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
    SherlockListFragment listCategoriesFragment = new CategoriesListFragment();
    transaction.add(R.id.fragment_list_categories, listCategoriesFragment, "fragment_list_categories").commit();

    return view;
}

---

在上面的链接中，解决方法不在片段中，而是在活动中（getSupportFragmentManager（）不是片段类的方法）。当我在对话框片段中这样尝试时：

SherlockListFragment listCategoriesFragment=new CategoriesListFragment（）；getSherlockActivity（）.getSupportFragmentManager（）.beginTransaction（）.detach（this）.replace（R.id.fragment\u list\u categories，listCategoriesFragment）.attach（listCategoriesFragment.addToBackStack（null）.commit（）我发现片段\列表\类别不是CategoriesListFragment中的视图。有什么想法吗？不要认为它会起作用，如果onCreateView不返回null，AlertDialog会崩溃，而且onCreateView显然是在onCreateDialog之前调用的