Question

我有Navigation Drawer菜单，因为我有片段Frag1，Frag2和Frag3。 Frag2被Frag21替换，Frag21被Frag22替换，等等如果我按下Frag22中的按钮到Frag21和Frag2，应用程序将正常关闭但是，如果我直接从Frag22转到Frag1并尝试关闭应用程序，它会崩溃并且我收到错误

E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.IllegalArgumentException: No view found for id 0x7f0f00c4 (com.NuSS.MyPAS:id/root_frame) for fragment CategoriesDisplayList{4260ca00 #1 id=0x7f0f00c4}
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:947)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1138)
at android.support.v4.app.BackStackRecord.popFromBackStack(BackStackRecord.java:960)
at android.support.v4.app.FragmentManagerImpl.popBackStackState(FragmentManager.java:1553)
at android.support.v4.app.FragmentManagerImpl$2.run(FragmentManager.java:497)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:458)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5306)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
at dalvik.system.NativeStart.main(Native Method)**

还给出了

@Override
public void onBackPressed() {
    if(fragmentManager.getBackStackEntryCount() != 0) {
        fragmentManager.popBackStack();
    } else {
        super.onBackPressed();
    }
}

在MainFragment Activity中

。

请让解决方案在几天内解决此错误。

更新

代码段

RootFragment

public class RootFragment extends Fragment  {

    private static final String TAG = "RootFragment";

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

        FragmentTransaction transaction = getFragmentManager().beginTransaction();
        /*
         * When this container fragment is created, we fill it with our first
         * "real" fragment
         */
        transaction.replace(R.id.root_frame, new CategoriesDisplayList());

        transaction.commit();

        return view;
    }

    @Override
    public void onDestroyView() {
        // TODO Auto-generated method stub
        super.onDestroyView();

        try {
            Fragment fragment = (getFragmentManager()
                    .findFragmentById(R.id.root_frame));
            FragmentTransaction ft = getActivity().getSupportFragmentManager()
                    .beginTransaction();
            ft.remove(fragment);
            ft.commit();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

CategoryDisplayList

public class CategoriesDisplayList extends Fragment implements SwipeRefreshLayout.OnRefreshListener{

    categoryListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            FragmentTransaction trans = getFragmentManager().beginTransaction();

            trans.replace(R.id.root_frame, new RootFragmentService());

            trans.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
            trans.addToBackStack(null);
            trans.commit();
        }
    });

    //registerForContextMenu(vendorListView);

    return rootView;
}

RootFragmentService

public class RootFragmentService extends Fragment {

    private static final String TAG = "RootFragment";

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.activity_root_fragment, container, false);

        FragmentTransaction transaction = getFragmentManager()
                .beginTransaction();
        /*
         * When this container fragment is created, we fill it with our first
         * "real" fragment
         */
        transaction.replace(R.id.root_frame, new ServicesList());

        transaction.commit();

        return view;
    }

    @Override
    public void onDestroyView() {
        // TODO Auto-generated method stub
        super.onDestroyView();

        try {
            Fragment fragment = (getFragmentManager()
                    .findFragmentById(R.id.root_frame));
            FragmentTransaction ft = getFragmentManager()
                    .beginTransaction();
            ft.remove(fragment);
            ft.commit();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

提前致谢。

Answer 1

在Android开发人员的后台按钮中创建onClickButton监听器更多信息：View.OnClickListener

Answer 2

如果您想返回堆栈，则无需在popBackStack事件上调用onBackPressed。如果您在transAction上使用addToBackStack方法，则onBackPressed会执行此操作而无需额外的代码。

fragmentManager.beginTransaction().setCustomAnimations(animationIn, animationOut).replace(layout, fragment, tag).addToBackStack(backStackTag).commit();

应用程序在片段中按下后退按钮时崩溃：IllegalArgumentException：找不到ID为0x7f0f00c4的视图

2 个答案: