Android底部导航栏（带片段）错误切换视图

Question

我已经实现了一个底栏导航片段using this tutorial

当片段仅用于一个活动时，一切正常，但是，我制作了 4 个不同的活动并将片段添加到每个活动中。

我在每个 Activity 中都有以下 case 语句，当单击底部栏导航按钮时，它们应该切换到相应的 Activity。

bottomBar.setOnItemSelectedListener(new OnTabSelectedListener() {
        @Override
        public void onItemSelected(int position) {
            switch (position) {
                case 0:
                    break;
                case 1:
                    Intent sellIntent = new Intent(getApplicationContext(), SellActivity.class);
                    sellIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
                    startActivity(sellIntent);
                    break;
                case 2:
                    Intent messagesIntent = new Intent(getApplicationContext(), MessagesActivity.class);
                    messagesIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
                    startActivity(messagesIntent);
                    break;
                case 3:
                    Intent profileIntent = new Intent(getApplicationContext(), ProfileActivity.class);
                    profileIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
                    startActivity(profileIntent);
                    break;

            }
        }

但是，当我点击其中一个导航按钮（例如案例 1）时，我会收到此错误。

FATAL EXCEPTION: main Process: me.xxx.spring, PID: 9000
                                                          java.lang.RuntimeException: Unable to start activity ComponentInfo{me.xx.spring/me.xx.spring.SellActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f0c006f (me.xx.spring:id/fragmentContainer) for fragment MyBottomNavFragment{8e1720 #0 id=0x7f0c006f}
                                                                 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
                                                                 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
                                                                 at android.app.ActivityThread.-wrap12(ActivityThread.java)
                                                                 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
                                                                 at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                 at android.os.Looper.loop(Looper.java:154)
                                                                 at android.app.ActivityThread.main(ActivityThread.java:6077)
                                                                 at java.lang.reflect.Method.invoke(Native Method)
                                                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
                                                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
                                                              Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f0c006f (me.xx.spring:id/fragmentContainer) for fragment MyBottomNavFragment{8e1720 #0 id=0x7f0c006f}
                                                                 at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1107)
                                                                 at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1295)
                                                                 at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801)
                                                                 at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1682)
                                                                 at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:388)
                                                                 at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:607)
                                                                 at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:181)
                                                                 at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1248)
                                                                 at android.app.Activity.performStart(Activity.java:6681)
                                                                 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2609)
                                                                 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) 
                                                                 at android.app.ActivityThread.-wrap12(ActivityThread.java) 
                                                                 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) 
                                                                 at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                 at android.os.Looper.loop(Looper.java:154) 
                                                                 at android.app.ActivityThread.main(ActivityThread.java:6077) 
                                                                 at java.lang.reflect.Method.invoke(Native Method) 
                                                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) 
                                                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) 

有人知道我哪里出错了吗？

我不会发布任何其他代码，例如片段类，因为它与here相同

谢谢

Answer 1

在更改活动时。使用 getFragmenentManager() 更新您的片段管理器。 对我来说效果很好。