從片段獲取適配器活動

所以我有一個具有EditText和ListFragment的FragmentActivity。在ListFragment中，我有一個適配器來放置所有項目。從片段獲取適配器活動

public class XXXListFragment extends ListFragment { 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
... 

ArrayAdapter<Spanned> adapter = new ArrayAdapter<Spanned>(inflater.getContext(), 
     R.layout.fragment_list_item_appearance, spannedArray); 

    setListAdapter(adapter); 

    return super.onCreateView(inflater, container, savedInstanceState); 

} 
}

使用EditText我希望用戶過濾listitems。

public class XXX extends FragmentActivity { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.quests_activity); 

EditText ediText = (EditText) findViewById(R.id.editext); 

ediText .addTextChangedListener(new TextWatcher() { 

    @Override 
    public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) { 
     // When user changed the Text 
     ListFragment.this.adapter.getFilter().filter(cs); 
    } 

    ... 
}); 
}

我的問題是，我不能讓Listfragment與上下文：

ListFragment.this.adapter.getFilter().filter(cs);

以下錯誤被拋出：

類型QuestsListFragment沒有外圍實例是範圍

任何想法如何解決這個問題？

確定這裏的整個代碼。我剛開始使用的碎片......

FragmentActivity：

public class XXX extends FragmentActivity implements ListFragmentItemClickListener { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.xxx_activity); 


} 

@Override 
protected void onStart() { 
    super.onStart(); 

    EditText editText = (EditText) findViewById(R.id.edittext) 

    editText .addTextChangedListener(new TextWatcher() { 

     @Override 
     public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) { 
      // THIS DOESN'T WORK 
      XXXListFragment.this.adapter.getFilter().filter(cs); 
     } 

     @Override 
     public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { 
     } 

     @Override 
     public void afterTextChanged(Editable arg0) { 
     } 
    }); 

} 

@Override 
public void onListFragmentItemClick(int position) { 

    int orientation = getResources().getConfiguration().orientation; 

    if (orientation == Configuration.ORIENTATION_LANDSCAPE) { 

     FragmentManager fragmentManager = getSupportFragmentManager(); 

     FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction(); 

     Fragment prevFrag = fragmentManager.findFragmentByTag("xxx.details"); 

     if (prevFrag != null) 
      fragmentTransaction.remove(prevFrag); 

     XXXDetailsFragment fragment = new XXXDetailsFragment(); 

     Bundle b = new Bundle(); 

     b.putInt("position", position); 

     fragment.setArguments(b); 

     fragmentTransaction.add(R.id.xxx_detail_fragment_container, fragment, 
       "xxx.details"); 

     fragmentTransaction.addToBackStack(null); 

     fragmentTransaction.commit(); 

    } else { 
     ... 
    } 
} 

... 
}

ListFragment：

public class XXXListFragment extends ListFragment { 

    ListFragmentItemClickListener ifaceItemClickListener; 

    public interface ListFragmentItemClickListener { 

     void onListFragmentItemClick(int position); 
    } 

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

     try { 
      ifaceItemClickListener = (ListFragmentItemClickListener) activity; 
     } catch (Exception e) { 
      Toast.makeText(activity.getBaseContext(), "Exception", Toast.LENGTH_SHORT).show(); 
     } 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 

     Spanned[] xxx = { Html.fromHtml(getString(R.string.xxx)), ... }; 

     ArrayAdapter<Spanned> adapter = new ArrayAdapter<Spanned>(inflater.getContext(), 
       R.layout.fragment_list_item_appearance, xxx); 

     setListAdapter(adapter); 

     return super.onCreateView(inflater, container, savedInstanceState); 
    } 

    @Override 
    public void onListItemClick(ListView l, View v, int position, long id) { 

     ifaceItemClickListener.onListFragmentItemClick(position); 

    } 

}

的ListFragment在FragmentActivity佈局還說：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:orientation="vertical" > 

... 

<EditText 
    android:id="@+id/edittext" 
    style="@style/red_edittext" 
    android:hint="@string/exittext_input_search" /> 

<LinearLayout 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="horizontal" > 

    <fragment 
     android:id="@+id/xxx_list_fragment" 
     android:name="com.xxx.XXXListFragment" 
     android:layout_width="350dp" 
     android:layout_height="wrap_content" /> 

    <ScrollView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" > 

     <FrameLayout 
      android:id="@+id/xxx_detail_fragment_container" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:orientation="vertical" > 
     </FrameLayout> 
    </ScrollView> 
</LinearLayout> 

</LinearLayout>

來源

2013-08-24 user1337

添加'ListFragment'的代碼在哪裏？所有你需要做的就是持有對ListFragment的引用，並在其中有一個public方法，你可以直接調用它。 – Squonk

我把整個代碼。請看看。 – user1337

面對同樣的問題，如果任何人解決了它，請分享 – subash

您必須在您的listfragment類中創建一個公共方法getAdapterOfList（），它將在內部訪問該適配器並將其返回。

來源

2014-08-25 11:38:23

從片段獲取適配器活動

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