Android 片段已经添加了IllegalStateException,只有片段的一个副本
我知道有几个关于这个异常的问题,但是,在使用Android 片段已经添加了IllegalStateException,只有片段的一个副本,android,Android,我知道有几个关于这个异常的问题,但是,在使用FragmentStatePagerAdapter时,我只有一个作业遇到了这个异常 在设置适配器和寻呼机时,我在下面指出了我遇到故障的线路 设置我的片段s: android.support.v4.app.FragmentTransaction t = getSupportFragmentManager().beginTransaction(); t.add(0, new StarTabFragment(), "starTab"); t.add(0, n
FragmentStatePagerAdapter
时,我只有一个作业遇到了这个异常
在设置适配器和寻呼机时,我在下面指出了我遇到故障的线路
设置我的片段
s:
android.support.v4.app.FragmentTransaction t = getSupportFragmentManager().beginTransaction();
t.add(0, new StarTabFragment(), "starTab");
t.add(0, new HierarchiesTabFragment(), "hierarchyTab");
t.add(0, new GroupsTabFragment(), "groupTab");
t.add(0, new VehiclesTabFragment(), "hierarchyTab");
t.commit();
设置我的适配器和寻呼机:
viewPager = (ViewPager) mDrawerLayoutRight.findViewById(R.id.pager);
PagerTabStrip tabs = (PagerTabStrip) mDrawerLayoutRight.findViewById(R.id.pager_tab_strip);
tabs.setTabIndicatorColor(Color.RED);
CustomPagerAdapter customPagerAdapter = new CustomPagerAdapter(getSupportFragmentManager());
viewPager.setOffscreenPageLimit(customPagerAdapter.getCount() - 2);
viewPager.setAdapter(customPagerAdapter); //crashing here
viewPager.setOnPageChangeListener(new LoopingPageChangeListener(viewPager));
viewPager.setCurrentItem(1);
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:876)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
Caused by: java.lang.IllegalStateException: Fragment already added: StarTabFragment{d12eb55 #1 id=0x7f0b0116 starTab}
at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1197)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:673)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1489)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:486)
at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:163)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1073)
at android.support.v4.view.ViewPager.populate(ViewPager.java:919)
at android.support.v4.view.ViewPager.setAdapter(ViewPager.java:447)
at com.company.activities.MapsActivity.setupSliderRight(MapsActivity.java:847)
at com.company.activities.MapsActivity.access$2100(MapsActivity.java:112)
at com.company.activities.MapsActivity$DBHierarchyResponseReceiver.onReceive(MapsActivity.java:2287)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
Stacktrace:
viewPager = (ViewPager) mDrawerLayoutRight.findViewById(R.id.pager);
PagerTabStrip tabs = (PagerTabStrip) mDrawerLayoutRight.findViewById(R.id.pager_tab_strip);
tabs.setTabIndicatorColor(Color.RED);
CustomPagerAdapter customPagerAdapter = new CustomPagerAdapter(getSupportFragmentManager());
viewPager.setOffscreenPageLimit(customPagerAdapter.getCount() - 2);
viewPager.setAdapter(customPagerAdapter); //crashing here
viewPager.setOnPageChangeListener(new LoopingPageChangeListener(viewPager));
viewPager.setCurrentItem(1);
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:876)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
Caused by: java.lang.IllegalStateException: Fragment already added: StarTabFragment{d12eb55 #1 id=0x7f0b0116 starTab}
at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1197)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:673)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1489)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:486)
at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:163)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1073)
at android.support.v4.view.ViewPager.populate(ViewPager.java:919)
at android.support.v4.view.ViewPager.setAdapter(ViewPager.java:447)
at com.company.activities.MapsActivity.setupSliderRight(MapsActivity.java:847)
at com.company.activities.MapsActivity.access$2100(MapsActivity.java:112)
at com.company.activities.MapsActivity$DBHierarchyResponseReceiver.onReceive(MapsActivity.java:2287)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
问题是我将
片段
预先添加到管理器中FragmentPagerAdapter
自动将所有Fragment
s添加到getItem()
方法中的管理器中
有关
getItem()
方法的详细信息,请参阅。添加片段的方式不一定存在问题。由于我遇到了类似的问题,后来当我使用调试器一步一步地查找真正的问题时,发现问题在于片段布局中的视图
我也遇到了类似的异常,但真正的异常是
java.lang.ClassCastException:
由于与我相同的原因,不确定是否有很多人可能会面临这个问题,但有一个小错误暂时导致
java.lang.IllegalStateException:Fragment已经添加了
,那就是我使用了一个自定义的Fragment
类
在onCreateView
方法中,我使用inflater.inflate()
对布局进行了充气,我忘记了使用attachToRoot
作为false
的方法。在我解决这个问题的那一刻,我的问题就解决了
说明:
viewPager = (ViewPager) mDrawerLayoutRight.findViewById(R.id.pager);
PagerTabStrip tabs = (PagerTabStrip) mDrawerLayoutRight.findViewById(R.id.pager_tab_strip);
tabs.setTabIndicatorColor(Color.RED);
CustomPagerAdapter customPagerAdapter = new CustomPagerAdapter(getSupportFragmentManager());
viewPager.setOffscreenPageLimit(customPagerAdapter.getCount() - 2);
viewPager.setAdapter(customPagerAdapter); //crashing here
viewPager.setOnPageChangeListener(new LoopingPageChangeListener(viewPager));
viewPager.setCurrentItem(1);
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:876)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
Caused by: java.lang.IllegalStateException: Fragment already added: StarTabFragment{d12eb55 #1 id=0x7f0b0116 starTab}
at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1197)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:673)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1489)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:486)
at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:163)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1073)
at android.support.v4.view.ViewPager.populate(ViewPager.java:919)
at android.support.v4.view.ViewPager.setAdapter(ViewPager.java:447)
at com.company.activities.MapsActivity.setupSliderRight(MapsActivity.java:847)
at com.company.activities.MapsActivity.access$2100(MapsActivity.java:112)
at com.company.activities.MapsActivity$DBHierarchyResponseReceiver.onReceive(MapsActivity.java:2287)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
带签名的方法:
充气(@LayoutRes int resource,@Nullable ViewGroup root)
返回的根目录
(父目录视图组
),而不是新膨胀的视图的根目录
。从JavaDocs:
@return:膨胀层次结构的根视图
。如果提供了root,则为
根视图
;否则它就是膨胀的XML文件的根
如果使用以下方法,可能会发生类似情况:
膨胀(@LayoutRes int resource,@Nullable ViewGroup root,boolean attachToRoot)
带有attachToRoot:true
片段
尝试将根布局添加为自身的子布局,这会导致
java.lang.IllegalStateException:指定的子级已具有父级
哪些雪球进入了我们原来的java.lang.IllegalStateException:片段已经添加了
希望这对某人有所帮助。我也遇到过同样的问题,结果证明是复制片段代码造成的。 Android studio自动重构了这些方法,因此我得到了以下结果:
public static Fragment newInstance(Bundle args) {
PurchaseOfferFragment frag = new PurchaseOfferFragment();
frag.setArguments(args);
return frag;
}
相反:
public static PurchaseOfferFragment newInstance(Bundle args) {
PurchaseOfferFragment frag = new PurchaseOfferFragment();
frag.setArguments(args);
return frag;
}
无法跟踪的非法状态异常中的结果
导致无法跟踪的错误,并引发异常。
只需将“Fragment”更改为PurchaseOfferFragment,即可100%解决此问题
检查静态方法中的片段名称是否正确,同时从现有片段进行复制和粘贴,以节省我损失的几个小时 有时这似乎是加载片段时发生的一般错误 例如:我在
onCreateView
内部调用findViewById
时出现了这个错误,该id在片段的布局中不存在
因此,确保片段
onCreateView
的代码没有任何bug(请尝试对其全部进行评论-仅返回原始膨胀视图-并查看它是否仍然抛出此错误。为什么要进行否决表决?在否决表决之前,您应该首先复制上述问题。您是对的,我一步一步地调试了应用程序,发现问题出在其他地方,谢谢you@AminKeshavarzian感谢您的确认。@jatin rana我已经面对wi这个问题和碎片布局有关。你的评论帮助我解决了这个问题。谢谢!@IgorOK好伙伴。谢谢你,这节省了很多时间!