Question

奇怪的是，我的程序中有2个列表视图。第一个列表视图我设置android：id =“@ android：id / list” 和第二个listview我的id我设置android：id =“@ + id / list1”。

这是正确的方法吗？因为我将第二个listview id设置为android：id =“@ + id / list1”所以无法运行所以我想知道它是因为它是id错误还是我的代码中存在问题。

我正在使用带有actionbarsherlock的jeremy库。我只是按照杰里米的例子，我没有找到他使用任何listView findviewbyid（列表）来获取他的菜单。在我改变id后，我的应用程序崩溃了。感谢

rightlist.xml

<?xml version="1.0" encoding="utf-8"?>
  <ListView xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/listright"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/list_padding"
android:paddingRight="@dimen/list_padding" />

leftlist.xml

<?xml version="1.0" encoding="utf-8"?>
 <ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/listleft"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/list_padding"
android:paddingRight="@dimen/list_padding" />

LeftListFragment.java

public class LeftListFragment extends ListFragment {

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.leftlist, null);
}

public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    SampleAdapter adapter = new SampleAdapter(getActivity());
    adapter.add(new SampleItem("a"));
    adapter.add(new SampleItem("b"));
    adapter.add(new SampleItem("c"));
    adapter.add(new SampleItem("d"));
    adapter.add(new SampleItem("e"));
    setListAdapter(adapter);


}

private class SampleItem {
    public String tag;

    public SampleItem(String tag) {
        this.tag = tag; 

    }
}

public class SampleAdapter extends ArrayAdapter<SampleItem> {

    public SampleAdapter(Context context) {
        super(context, 0);
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = LayoutInflater.from(getContext()).inflate(R.layout.leftrow, null);
        }

        TextView title = (TextView) convertView.findViewById(R.id.row_title1);
        title.setText(getItem(position).tag);

        return convertView;
    }

}
    }

rightlistfragment.java

 public class RightListFragment extends ListFragment {

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.rightlist, null);
}

public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    SampleAdapter adapter = new SampleAdapter(getActivity());
    for (int i = 0; i < 20; i++) {
        adapter.add(new SampleItem("Sample List", android.R.drawable.ic_menu_search));
    }
    setListAdapter(adapter);
}

private class SampleItem {
    public String tag;
    public int iconRes;
    public SampleItem(String tag, int iconRes) {
        this.tag = tag; 
        this.iconRes = iconRes;
    }
}

public class SampleAdapter extends ArrayAdapter<SampleItem> {

    public SampleAdapter(Context context) {
        super(context, 0);
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = LayoutInflater.from(getContext()).inflate(R.layout.rightrow, null);
        }
        ImageView icon = (ImageView) convertView.findViewById(R.id.row_icon);
        icon.setImageResource(getItem(position).iconRes);
        TextView title = (TextView) convertView.findViewById(R.id.row_title);
        title.setText(getItem(position).tag);

        return convertView;
    }

}
 }

主要活动/ leftandrightactivity.java

public class LeftAndRightActivity extends BaseActivity {

public LeftAndRightActivity() {
    super(R.string.left_and_right);
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getSlidingMenu().setMode(SlidingMenu.LEFT_RIGHT);
    getSlidingMenu().setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);

    setContentView(R.layout.activity_main);
    getSupportFragmentManager()
    .beginTransaction()
    .replace(R.id.menu_frame, new LeftListFragment())
    .commit();

    getSlidingMenu().setSecondaryMenu(R.layout.menu_frame_two);
    getSlidingMenu().setSecondaryShadowDrawable(R.drawable.shadowright);
    getSupportFragmentManager()
    .beginTransaction()
    .replace(R.id.menu_frame_two, new RightListFragment())
    .commit();
}

   }

错误日志

10-29 17:06:52.085: E/AndroidRuntime(26618): FATAL EXCEPTION: main
10-29 17:06:52.085: E/AndroidRuntime(26618): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.peopeo.peopeo1/com.peopeo.peopeo1.LeftAndRightActivity}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.app.ActivityThread.access$600(ActivityThread.java:140)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.os.Handler.dispatchMessage(Handler.java:99)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.os.Looper.loop(Looper.java:137)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.app.ActivityThread.main(ActivityThread.java:4898)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at java.lang.reflect.Method.invokeNative(Native Method)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at java.lang.reflect.Method.invoke(Method.java:511)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at dalvik.system.NativeStart.main(Native Method)
10-29 17:06:52.085: E/AndroidRuntime(26618): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.support.v4.app.ListFragment.ensureList(ListFragment.java:344)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at     android.support.v4.app.ListFragment.onViewCreated(ListFragment.java:145)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:941)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1460)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:556)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1167)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at android.app.Activity.performStart(Activity.java:5216)
10-29 17:06:52.085: E/AndroidRuntime(26618):    at     android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2073)
10-29 17:06:52.085: E/AndroidRuntime(26618):    ... 11 more

Answer 1

我同意@NitroNbg，你应该指定你的新ID。喜欢 android：id =“@ + id / listId”

ListView list = (ListView) findViewById(R.id.listId);

或检查this一个。

Answer 2

ListFragment期望布局包含ListView，其ID为@android:id/list：

ListFragment具有由单个列表视图组成的默认布局。但是，如果需要，可以通过从onCreateView(LayoutInflater, ViewGroup, Bundle)返回自己的视图层次结构来自定义片段布局。为此，您的视图层次结构必须包含一个ID为"@android:id/list"的ListView对象（如果它在代码中，则为list）

在不止一个地方拥有相同的ID是完全没问题的。

因此，只需在两种布局中将ListView ID设置为@android:id/list。

Answer 3

您的BaseActivity是否从ListActivity扩展？您的例外情况表明......

当我更改ListView的ID时无法运行应用程序

3 个答案: