Question

喜我需要为列表视图执行onListItemClick事件。我做了以下但没有奏效。我粘贴我的代码和logcat。请帮我。错误是：（java.lang.RuntimeException：您的内容必须有一个ListView，其id属性为'android.R.id.list'）

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cat文件：

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)

我的main.xml：

 <?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>

Answer 1

 public class MyListView extends Activity

intead of

 public class MyListView extends ListActivity

并且要听取项目点击，请使用：

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

                         //Take action here.
                 }
            }
     );

所以你的完整源代码是这样的：

 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();

            }   
        }       
);

 }
}

根据ernazm回答：

如果你想使用

   public class MyListView extends ListActivity

你必须删除

 setContentView(R.layout.main);

正如我所看到的，你的xml文件中有一个drawable 您仍然可以使用listview.addHeader（）添加图像标题：

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

Answer 2

ListActivity需要身份ListView的{{1}}。它为您提供了管理android.R.id.list及其适配器的其他方法。所以你不应该使用像

这样的代码

ListView

使用 list1 = (ListView) findViewById(R.id.ListView01); 代替。

但是，您可以像Kartik建议的那样，意味着您可以使用常规list1 = getListView()代替Activity并使用您最初发布的代码。

Answer 3

您的问题是，必须确保您的ListView具有此ID：@android:id/list（您当前正在使用ListView01）。事实上，这是错误试图告诉你的：

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

Answer 4

在您的XML中，将ListView0的ID更改为list。

Answer 5

在名为main.xml的xml布局文件中，您会看到一个ID为ListView01的列表。这应该挂到android.R.id.list。所以在你的xml ...

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

此外，您不需要创建对它的引用来设置适配器，您只需为ListActivity调用setListAdapter方法。

Answer 6

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中为listview设置onListItemClick

6 个答案: