的ListView，適配器例外

Question

好，我很特林做到這一點：

其中有兩個標籤，並在這裏一個標籤應該有一個ListView

示例應用程序：

我的問題：我已經創建了適配器的ListView和TextView。但每次我在ListView調用setAdapter通信超時

OK，第一個選項卡有這樣的xml文件（view1.xml）：

<?xml version="1.0" encoding="utf-8"?> 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
       android:orientation="vertical" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent"> 

    <ListView 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/listView"/> 
</LinearLayout> 

它的類中的片段：

public class Chats extends Fragment { 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
    { 
     View view = inflater.inflate(R.layout.view1, container, false); 
     ListView listView = (ListView) view.findViewById(R.id.listView); 

     String[] arr = {"A", "B", "C", "D", "E", "F"}; 
     ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), R.layout.row, R.id.listView, arr); 
     //listView.setAdapter(adapter); 
     //Log.d("MY_LOGS", "listView == null: " + (listView == null)); 

     return view; 
    } 
} 

文件row.xml其中位於TextView的

<?xml version="1.0" encoding="utf-8"?> 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
                 android:layout_width="fill_parent" 
                 android:layout_height="?android:attr/listPreferredItemHeight" 
                 android:padding="6dip" > 

    <TextView 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/viewText" 
     /> 


</RelativeLayout> 

如果我註釋掉listView.se tAdapter與NullPointerException異常的應用程序超時。

ERROR/AndroidRuntime(18321): FATAL EXCEPTION: main 
     java.lang.NullPointerException 
     at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:392) 
     at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362) 
     at android.widget.AbsListView.obtainView(AbsListView.java:2624) 
     at android.widget.ListView.measureHeightOfChildren(ListView.java:1254) 
     at android.widget.ListView.onMeasure(ListView.java:1166) 
     at android.view.View.measure(View.java:16831) 
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5245) 
     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410) 
     at android.widget.LinearLayout.measureVertical(LinearLayout.java:695) 
     at android.widget.LinearLayout.onMeasure(LinearLayout.java:588) 
     at android.view.View.measure(View.java:16831) 
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5245) 
     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410) 
     at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1052) 
     at android.widget.LinearLayout.onMeasure(LinearLayout.java:590) 
     at android.view.View.measure(View.java:16831) 
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5245) 
     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410) 
     at android.widget.LinearLayout.measureVertical(LinearLayout.java:695) 
     at android.widget.LinearLayout.onMeasure(LinearLayout.java:588) 
     at android.view.View.measure(View.java:16831) 
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5245) 
     at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
     at android.view.View.measure(View.java:16831) 
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5245) 
     at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:302) 
     at android.view.View.measure(View.java:16831) 
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5245) 
     at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
     at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2586) 
     at android.view.View.measure(View.java:16831) 
     at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2186) 
     at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1349) 
     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1532) 
     at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1246) 
     at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6350) 
     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:791) 
     at android.view.Choreographer.doCallbacks(Choreographer.java:591) 
     at android.view.Choreographer.doFrame(Choreographer.java:561) 
     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:777) 
     at android.os.Handler.handleCallback(Handler.java:730) 
     at android.os.Handler.dispatchMessage(Handler.java:92) 
     at android.os.Looper.loop(Looper.java:137) 
     at android.app.ActivityThread.main(ActivityThread.java:5419) 
     at java.lang.reflect.Method.invokeNative(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:525) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003) 
     at dalvik.system.NativeStart.main(Native Method) 

有什麼問題？什麼是空..

Answer 1

使用正確的ID：

ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), R.layout.row, R.id.viewText, arr);