从listview更改为listview

Question

当我单击类别列表中的vechicles项时，我希望我的类别列表视图更改为vechicles列表视图。我是android开发的新手，任何帮助都将不胜感激。

public class CategoryFragment extends Fragment implements OnItemClickListener {

public CategoryFragment() {
    // Required empty public constructor

}


View mView; // used to get access to findViewById function
private ListView CategoriesList; //Contains List Layout
private String[] CategoriesString; //Contains String Array

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    mView = inflater.inflate(R.layout.fragment_category, container, false);


    CategoriesList = (ListView) mView.findViewById(R.id.CategoriesListView);

    CategoriesString = getResources().getStringArray(R.array.CategoriesData);

    ArrayAdapter<String> objAdapter = new ArrayAdapter<String>(this.getActivity(),android.R.layout.simple_list_item_1,CategoriesString);

    CategoriesList.setOnItemClickListener(this);
    CategoriesList.setAdapter(objAdapter);

    return mView;
}

@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
    // TODO Auto-generated method stub

    if(arg2 == 1)
    {
        //Toast.makeText(this.getActivity(), "hello", Toast.LENGTH_SHORT).show();
        Intent intent1 = new Intent(getActivity(),Categories_vehicles.class);
        startActivity(intent1);
    }
}

}

这是我的清单，里面有车辆

public class Categories_vehicles extends Fragment {

View mView; // used to get access to findViewById function
private ListView VehiclesList; //Contains List Layout
private String[] VehiclesString; //Contains String Array

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    mView = inflater.inflate(R.layout.categories_vehicles, container, false);


    VehiclesList = (ListView) mView.findViewById(R.id.Vehicles_List);

    VehiclesString = getResources().getStringArray(R.array.VehiclesData);

    ArrayAdapter<String> objAdapter = new ArrayAdapter<String>(this.getActivity(),android.R.layout.simple_list_item_1,VehiclesString);
    VehiclesList.setAdapter(objAdapter);


    return mView;
}



}

这是更新的logcat

06-14 12:00:45.513: E/AndroidRuntime(2145): FATAL EXCEPTION: main 06-14 12:00:45.513: E/AndroidRuntime(2145): Process: com.genie_alpha, PID: 2145 06-14 12:00:45.513: E/AndroidRuntime(2145): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.genie_alpha/com.genie_alpha.Categories_vehicles}: java.lang.ClassCastException: com.genie_alpha.Categories_vehicles cannot be cast to android.app.Activity 06-14 12:00:45.513: E/AndroidRuntime(2145): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121) 06-14 12:00:45.513: E/AndroidRuntime(2145): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 06-14 12:00:45.513: E/AndroidRuntime(2145): at android.app.ActivityThread.access$800(ActivityThread.java:135) 06-14 12:00:45.513: E/AndroidRuntime(2145): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 06-14 12:00:45.513: E/AndroidRuntime(2145): at android.os.Handler.dispatchMessage(Handler.java:102) 06-14 12:00:45.513: E/AndroidRuntime(2145): at android.os.Looper.loop(Looper.java:136) 06-14 12:00:45.513: E/AndroidRuntime(2145): at android.app.ActivityThread.main(ActivityThread.java:5017) 06-14 12:00:45.513: E/AndroidRuntime(2145): at java.lang.reflect.Method.invokeNative(Native Method) 06-14 12:00:45.513: E/AndroidRuntime(2145): at java.lang.reflect.Method.invoke(Method.java:515) 06-14 12:00:45.513: E/AndroidRuntime(2145): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 06-14 12:00:45.513: E/AndroidRuntime(2145): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 06-14 12:00:45.513: E/AndroidRuntime(2145): at dalvik.system.NativeStart.main(Native Method) 06-14 12:00:45.513: E/AndroidRuntime(2145): Caused by: java.lang.ClassCastException: com.genie_alpha.Categories_vehicles cannot be cast to android.app.Activity 06-14 12:00:45.513: E/AndroidRuntime(2145): at android.app.Instrumentation.newActivity(Instrumentation.java:1061) 06-14 12:00:45.513: E/AndroidRuntime(2145): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2112) 06-14 12:00:45.513: E/AndroidRuntime(2145): ... 11 more

Answer 1

你的逻辑猫找到答案了

06-14 11:28:24.753: E/AndroidRuntime(2015): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.genie_alpha/com.genie_alpha.Categories_vehicles}; have you declared this activity in your AndroidManifest.xml?

您需要在AndroidManifest.xml文件中声明缺少的活动。