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e: FATAL EXCEPTION: main
Process: com.lijiankun24.architecturepractice, PID: 16466
java.lang.NoSuchMethodError: No virtual method put(Ljava/lang/Object;Ljava/lang/Object;)Landroid/arch/core/internal/SafeIterableMap$Entry; in class Landroid/arch/core/internal/FastSafeIterableMap; or its super classes (declaration of 'android.arch.core.internal.FastSafeIterableMap' appears in /data/app/com.lijiankun24.architecturepractice-1/base.apk)
at android.arch.core.internal.FastSafeIterableMap.putIfAbsent(FastSafeIterableMap.java:50)
at android.arch.lifecycle.LifecycleRegistry.addObserver(LifecycleRegistry.java:146)
at android.arch.lifecycle.LiveData.observe(LiveData.java:199)
at com.lijiankun24.architecturepractice.ui.fragment.GirlListFragment.subscribeUI(GirlListFragment.java:83)
at com.lijiankun24.architecturepractice.ui.fragment.GirlListFragment.onActivityCreated(GirlListFragment.java:72)
at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:2363)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1442)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1740)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1809)
at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:799)
at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2580)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2367)
at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2322)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:2199)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:651)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:145)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1236)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1084)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1614)
at android.view.View.measure(View.java:18035)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:963)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:629)
at android.view.View.measure(View.java:18035)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5702)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
at android.view.View.measure(View.java:18035)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5702)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1692)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:760)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:629)
at android.view.View.measure(View.java:18035)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5702)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
at android.view.View.measure(View.java:18035)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5702)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1692)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:760)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:629)
at android.view.View.measure(View.java:18035)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5702)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2785)
at android.view.View.measure(View.java:18035)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2461)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1445)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1680)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1323)
at android.view.ViewRootImpl$TraversalRunnable.run(V
11-18 11:11:14.810 16466-16466/com.lijiankun24.architecturepractice I/Process: Sending signal. PID: 16466 SIG: 9

1.比如现在加载到10页，退出，关闭网络，打开app 进来 打开网络，页数从第一页开始哈
在GirlListViewModel类的
mGirls = Transformations.switchMap(mGirlPageIndex, new Function<Integer, LiveData<List>>() {
@OverRide
public LiveData<List> apply(Integer input) {

            return mGirlsDataRepository.getGirlList(input);
        }
    });

@deprecated Use {@link Fragment} instead of it.
LifecycleFragment已经被废弃了？？？？看你的文章里好像写的还是lifecycleFragment