如何在android中设置onListItemClick for listview

问题描述：

hi 我需要为列表视图执行onListItemClick事件。我做了以下，但没有工作。我粘贴我的代码和logcat。请帮帮我。错误是：（了java.lang.RuntimeException：你的内容必须有一个ListView其id属性为 'android.R.id.list'）如何在android中设置onListItemClick for listview

public class MyListView extends ListActivity { 
    /** Called when the activity is first created. */ 
// @Override 
    ListView list1; 
    private String array[] = { "Iphone", "Tutorials", "Gallery", "Android","item 1", "item 2", "item3", "item 4" }; 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     list1 = (ListView) findViewById(R.id.ListView01); 
     list1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, array));   

    } 
    protected void onListItemClick(ListView l, View v, int position, long id) { 
     super.onListItemClick(l, v, position, id); 
     Object o = this.getListAdapter().getItem(position); 
     String pen = o.toString(); 
     Toast.makeText(this, "You have chosen the pen: " + " " + pen, Toast.LENGTH_LONG).show(); 
    } 
}

我的日志文件的猫：

04-19 18:12:36.021: ERROR/AndroidRuntime(5162): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sai.ui.listview/com.sai.ui.listview.MyListView}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list' 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2268) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2284) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at android.app.ActivityThread.access$1800(ActivityThread.java:112) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1692) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at android.os.Handler.dispatchMessage(Handler.java:99) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at android.os.Looper.loop(Looper.java:123) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at android.app.ActivityThread.main(ActivityThread.java:3948) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at java.lang.reflect.Method.invokeNative(Native Method) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at java.lang.reflect.Method.invoke(Method.java:521) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at dalvik.system.NativeStart.main(Native Method) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list' 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at android.app.ListActivity.onContentChanged(ListActivity.java:236) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:321) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at android.app.Activity.setContentView(Activity.java:1631) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at com.sai.ui.listview.MyListView.onCreate(MyListView.java:21) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1132) 
04-19 18:12:36.021: ERROR/AndroidRuntime(5162):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2231)

我main.xml中：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:stackFromBottom="true" 
> 
<ImageView 
android:id="@+id/imageview1" 
android:layout_width="wrap_content" 
android:layout_height="50px" 
android:background="@drawable/applicationbar" 
android:layout_x="0px" 
android:layout_y="0px" 
> 
</ImageView> 
<TextView 
android:id="@+id/textview1" 
android:layout_width="wrap_content" 
android:layout_height="50px" 
android:text="TextView" 
android:layout_x="0px" 
android:layout_y="55px" 
> 
</TextView> 
<ListView android:id="@+id/list" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:layout_marginLeft="10px" 
android:layout_marginRight="10px" 
android:layout_marginTop="35px" 
android:layout_marginBottom="40px" 
android:paddingLeft="0px" 
android:paddingRight="0px" /> 
</LinearLayout>

答

ListActivity要求ListView与编号android.R.id.list。它为您提供其他方法来管理您的ListView及其适配器。所以，你不应该使用这样的代码

list1 = (ListView) findViewById(R.id.ListView01);

使用 list1 = getListView() 代替。

但是，您可以像Kartik建议的那样去使用，这意味着您可以使用常规Activity而不是ListActivity并使用您最初发布的代码。

答

你这里的问题是，你必须确保您的ListView有这个ID：@android:id/list（哟你目前正在使用ListView01）。事实上，这就是错误是试图告诉你：

<ListView 
    android:id="@android:id/list" 
    ....

答

在你的XML，改变ListView0只是list的ID。

我在main.xml中将ListView更改为list和list1 =（ListView）findViewById（R.id.list）;再次我得到同样的错误。 – 2011-04-19 13:03:37

你可以发布你的XML吗？ – 2011-04-19 13:04:42

嗨，我通过编辑我的问题粘贴我的XML（最后）请帮助我。 – 2011-04-19 13:08:08

答

在你的名为main.xml的xml布局文件中，看起来你有一个ID为ListView01的列表。这应该挂在android.R.id.list上。因此，在你的XML ...

<ListView android:id="@android:id/list" 
... 
/>

而且，你并不需要创建一个引用来设置适配器，你可以调用setListAdapter方法ListActivity。这一翻译的

public class MyListView extends ListActivity

和收听项的点击

嗨如何在我的活动中使用@android：id/list list1 =（ListView）findViewById（R.id ....）我没有从R.id得到它。请帮帮我。 – 2011-04-19 13:13:39

答

public class MyListView extends Activity

，使用此：

list1.setOnItemClickListener(
     new OnItemClickListener() 
     { 
      @Override 
      public void onItemClick(AdapterView<?> arg0, View view, 
        int position, long id) { 

         //Take action here. 
       } 
      } 
    );

所以你完整的源代码将是这样的：

public class MyListView extends Activity { 
/** Called when the activity is first created. */ 

    ListView list1; 
private String array[] = { "Iphone", "Tutorials", "Gallery", "Android","item 1", "item 2", "item3", "item 4" }; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    list1 = (ListView) findViewById(R.id.list); 
    list1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, array));   


list1.setOnItemClickListener(
     new OnItemClickListener() 
     { 

      @Override 
      public void onItemClick(AdapterView<?> arg0, View view, 
        int position, long id) { 
       // TODO Auto-generated method stub 
       Object o = list1.getItemAtPosition(position); 
       String pen = o.toString(); 
       Toast.makeText(getApplicationContext(), "You have chosen the pen: " + " " + pen, Toast.LENGTH_LONG).show(); 

      } 
     }  
); 

} 
}

Edi特德按ernazm答案：，如果你想使用

public class MyListView extends ListActivity

您必须删除

setContentView(R.layout.main);

我看到有一个可绘制在XML文件中你仍然可以去用这个添加图像头使用listview.addHeader（）：

Resources res=getResources(); 
Drawable d1=res.getDrawable(R.drawable.yourimage); 
textview.setBackgroundDrawable(d1); 
listview.addHeaderView(tv1);

答

protected void onListItemClick(ListView l, View v, int position, long id) { 
    super.onListItemClick(l, v, position, id); 
    Builder builder = new AlertDialog.Builder(this); 
    builder.setMessage(item[position] + " is clicked."); 
    builder.setPositiveButton("OK", null); 
    builder.show(); 
}

如何在android中设置onListItemClick for listview

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