我正在处理具有标签布局的嵌套片段的简单应用程序。父活动是LandingActivity。在LandingActivity里面我称之为LandingFragment。在LandingFragment内部,我有以下功能。
Tasks TAB Fragments flow is TasksMainFragment->TasksFragment->DetailFragment.
Pending TAB Fragments flow is PendingMainFragment->PendingFragment->PendingDetailFragment
以下代码表示从TasksMainFragment调用TasksFragment。
TasksFragment fragment=new TasksFragment();
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
FragmentTransaction fragmentTransaction=fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.id_frame, fragment, "tasks");
fragmentTransaction.addToBackStack("tasks");
fragmentTransaction.commit();
下面的代码表示从TasksFragment调用DetailFragment。基本上,TasksFragment包含具有一些任务的recyclerview。当用户点击任务时,它将打开任务的DetailFragment。
Fragment fragment = new DetailFragment();
FragmentManager manager = ((FragmentActivity) mContext).getSupportFragmentManager();
FragmentTransaction fragmentTransaction = manager.beginTransaction();
Bundle bundle = new Bundle();
ItemModel item = list.get(position);
bundle.putSerializable("item", item);
bundle.putBoolean("having", havingStartedService());
fragment.setArguments(bundle);
fragmentTransaction.replace(R.id.id_frame, fragment, "details");
fragmentTransaction.addToBackStack("details");
fragmentTransaction.commit();
当用户切换到挂起标签时,相同的行为或相同的功能将起作用。但问题是,当我在一段时间后打开应用程序或每天早上第一次打开应用程序时,我正面临这个问题。
当我更改屏幕方向时,我也面临这个问题。
我在下面发布了logcat以便更好地理解。
12-20 16:33:01.658 21590-21590/com.naushad.kenostaff E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.naushad.kenostaff, PID: 21590
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.naushad.kenostaff/com.naushad.kenostaff.landing.LandingActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f070059 (com.naushad.kenostaff:id/id_frame) for fragment TasksFragment{b980f0d #7 id=0x7f070059 tasks}
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2684)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2751)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4556)
at android.app.ActivityThread.-wrap19(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1502)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6186)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f070059 (com.naushad.kenostaff:id/id_frame) for fragment TasksFragment{b980f0d #7 id=0x7f070059 tasks}
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1293)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1528)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1595)
at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:758)
at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2363)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2149)
at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2103)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2013)
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 com.stfalcon.androidmvvmhelper.mvvm.activities.BindingActivity.onStart(BindingActivity.java:50)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1249)
at android.app.Activity.performStart(Activity.java:6701)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2647)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2751)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4556)
at android.app.ActivityThread.-wrap19(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1502)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6186)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
请在这个问题上给我一些帮助。我过去一周面对这个问题,我尝试了很多方法,但没有任何帮助。提前谢谢。
答案 0 :(得分:2)
使用 getChildFragmentManager()而不是 getActivity.getSupportFragmentManager() .i解决了两次崩溃。
对于打开TasksFragment,我使用下面的代码。
foreach ($content as $dates => $row) {
$date = $dates;
为了打开DetailFragment,我使用下面的代码。
FragmentManager fragmentManager = getChildFragmentManager();
在任务选项卡中。在挂起的选项卡中,我也按照相同的方式解决崩溃问题。
现在我正面临其他问题。我正在检查在TasksMainFragment和PendingMainFragment中用户可以看到哪个片段。因为我在两个主要片段中打开了两个片段。所以取决于我想要更新可见片段的UI。
通过使用下面的代码,我正在检查哪个片段对用户可见。
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
但是当我在TasksFragment中时,上面的代码无效。当我在DetailFragment上面的代码工作正常。请帮我解决这个问题,或者让我知道我的方式是否有任何问题。