如何在 DialogFragment 中显示现有的 ListFragment

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【中文标题】如何在 DialogFragment 中显示现有的 ListFragment【英文标题】:How to display an existing ListFragment in a DialogFragment 【发布时间】:2012-07-05 17:19:31 【问题描述】:

我有以下问题:

我有一个现有的ListFragment,但我想将其显示为对话框。

我的第一种方法是创建一个DialogFragment,其中必须有ListFragment,但目前似乎无法将片段放入片段中。

扩展DialogFragment 代替ListFragment 也是不可能的,因为ListFragment 方法的大量使用。

有没有简单的方法可以做到这一点?

【问题讨论】:

我也有类似的问题。我很惊讶我在任何地方都找不到答案。我认为这是一项常见的任务,例如当您想在纵向显示带有 Fragment 的全屏活动,并在横向显示与对话框相同的 Fragment 时。 我最终在框架布局中显示了覆盖主片段的现有 ListFragment。在我看来,我看起来很不错,有点像这样:1.bp.blogspot.com/-f_1A98GQ1fU/T0bzdWnYIOI/AAAAAAAAUmA/… 也许这个例子:***.com/questions/12516626/… 【参考方案1】:

对我有用的是 1) 在您的 DialogFragment 的 xml 布局中调用,比如说,DialogFragmentwWithListFragment 指定 ListFragment 类 例如。 dialog_fragment_with_list_fragment.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_
        android:layout_>
        <fragment
             android:id="@+id/flContent"
             android:layout_
             android:layout_
             android:padding = "10dp"
             class="com.xxx.yyy.DialogFragmentwWithListFragment " />
</LinearLayout>

2)DialogFragmentwWithListFragment 中膨胀 dialog_fragment_with_list_fragment.xml

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
    return inflater.inflate(R.layout.dialog_fragment_with_list_fragment, null);

3) 调用 DialogFragmentwWithListFragment 作为常规 DialogFragment:

 DialogFragmentwWithListFragment dialogFragment = DialogFragmentwWithListFragment  .newInstance();
 dialogFragment.setRetainInstance(true);
 dialogFragment.show(getFragmentManager(), "tag");

希望,它会有所帮助。

【讨论】:

谢谢,但是如果您在创建DialogFragmentwWithListFragment 时需要setArguments() 怎么办??【参考方案2】:

我要么将ListView 放入DialogFragment,要么尝试将ListFragment 放入Dialog。我不确定第二个是否可能。

【讨论】:

如果我运行它两次,这会爆炸:“原因:java.lang.IllegalArgumentException:二进制 XML 文件第 6 行:重复 id 0x7f09007b、标签 null 或父 id 0xffffffff 与另一个片段” 【参考方案3】:

您可以通过DialogFragment 以这种方式显示列表:(使用支持 v4 库)

public class MyListDialogFragment extends DialogFragment 
    onDlgListClick mCallback;

    private String[] lista;//the list you want to show with the dialog

    public static MyListDialogFragment newInstance(Bundle fB)
    MyListDialogFragment lstFrag = new MyListDialogFragment();
    Bundle args = new Bundle();
        args.putStringArray("lista", fB.getStringArray("lista"));//the list
        args.putString("titulo", fB.getString("titulo"));//the title of the list
        lstFrag.setArguments(args);

        return lstFrag;
    

    public interface onDlgListClick
        public void onLstItemSelected(String selection);
    

    @Override
    public void onAttach(Activity activity) 
        super.onAttach(activity);

        // This makes sure that the container activity has implemented
        // the callback interface. If not, it throws an exception
        try 
            mCallback = (onDlgListClick) activity;
         catch (ClassCastException e) 
            throw new ClassCastException(activity.toString()
                    + " must implement onLstItemSelected");
        
        this.setCancelable(false);
    

     @Override
     public Dialog onCreateDialog(Bundle savedInstanceState) 
         lista = getArguments().getStringArray("lista");

         return new AlertDialog.Builder(getActivity())
         .setTitle(getArguments().getString("titulo"))
         .setCancelable(false)
         .setItems(lista, new DialogInterface.OnClickListener()
            public void onClick(DialogInterface dialog, int item)

                mCallback.onLstItemSelected(lista[item]);
                getDialog().dismiss(); //maybe you dont need these two lines
                MyListDialogFragment.this.dismiss();
            
         ).create();
     


在你扩展FragmentActivity的主要活动上并实现接口MyListDialogFragment.onDlgListClick

//the interface
@Override
public void onLstItemSelected(String selection) //list dialog fragment interface
//do whatever you want


//calling the dialog
public void showFrags(int id)

        Bundle fB = new Bundle();

        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        Fragment prev = getSupportFragmentManager().findFragmentByTag("listdialog");
        if (prev != null) 
            ft.remove(prev);
        
        ft.commit();
        switch(id)
        case 0:
        fB.putStringArray("lista", list); fB.putString("titulo",title);
        MyListDialogFragment newListDlg = MyListDialogFragment.newInstance(fB);
        newListDlg.show(ft, "listdialog");
        break;
        

【讨论】:

最小实现和其他修复:***.com/questions/12516626/…【参考方案4】:

当在另一个片段中添加一个片段时,文档说您应该动态地执行此操作(即,而不是将 &lt;fragment&gt; 标记硬编码到您的布局 XML 中。

所以这里是如何动态地做到这一点。在这种情况下,我将MyListFragment 添加到MyDialogFragment

MyDialogFragment.java

import android.app.Dialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;

public class MyDialogFragment extends DialogFragment 

    public static final String TAG = MyDialogFragment.class.getSimpleName();
    private static final String ARG_TITLE = "ARG_TITLE";

    private EditText mEditText;

    public MyDialogFragment() 
        // Empty constructor required for DialogFragment
    

    public static MyDialogFragment newInstance(String title) 
        MyDialogFragment myDialogFragment = new MyDialogFragment();
        Bundle args = new Bundle();
        args.putString(ARG_TITLE, title);
        myDialogFragment.setArguments(args);
        return myDialogFragment;
    

    @Override
    public void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
    


    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) 
        Dialog dialog = super.onCreateDialog(savedInstanceState);
        Bundle args = getArguments();
        if (args != null) 
            dialog.setTitle(args.getString(ARG_TITLE));
        
        return dialog;
    

    public void setTitle(String title) 
        Dialog dialog = getDialog();
        dialog.setTitle(title);
    

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

        Button okButton = (Button)view.findViewById(R.id.okButton);
        okButton.setOnClickListener(
                new View.OnClickListener() 
                    @Override
                    public void onClick(View view) 
                        dismiss();
                        //dismissAllowingStateLoss();
                    
                
        );

        return view;
    

    @Override
    public void onStart() 
        super.onStart();
        //addInnerFragment();
    

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) 
        super.onViewCreated(view, savedInstanceState);
        addInnerFragment();
    

    public void addInnerFragment() 

        FragmentManager childFragmentManager = getChildFragmentManager();
        FragmentTransaction transaction = childFragmentManager.beginTransaction();
        //transaction.add(R.id.fragmentContainer, new MyListFragment());
        transaction.add(R.id.fragmentContainer, MyListFragment.newInstance(MyListFragment.MODE_SELL));
        //transaction.commit();
        transaction.commitAllowingStateLoss();
        childFragmentManager.executePendingTransactions();

    


(如您所见,它还包含一些设置对话框标题的功能。)

dialog_fragment_selected_products.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_
    android:layout_
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MyDialogFragment"
    android:orientation="vertical">

    <LinearLayout
        android:id="@+id/fragmentContainer"
        android:layout_
        android:layout_
        android:orientation="vertical"
        android:layout_alignParentTop="true"
        android:layout_above="@+id/okButton" />

    <Button
        android:id="@+id/okButton"
        android:layout_
        android:layout_
        android:layout_alignParentBottom="true"
        android:text="@string/ok" />

</RelativeLayout>

这样做的另一个好处是您可以创建内部片段的实例,以便将任何参数传递给它。

为了完整起见,这里是我在活动中用来显示 DialogFragment 的代码:

MyActivity.java

private void showCurrentItemsDialog() 

    MyDialogFragment myDialogFragment = MyDialogFragment.newInstance("cpuk.org");
    //myDialogFragment.setRetainInstance(true);

    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction transaction = fragmentManager.beginTransaction();
    transaction.add(myDialogFragment, MyDialogFragment.TAG);
    transaction.commitAllowingStateLoss();
    fragmentManager.executePendingTransactions();


【讨论】:

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