search

Leeeyou / iRead

Using Retrofit2,RxJava,RxKotlin,OkHttp,lottie,Material Design combined with Kotlin to display the wanAndroid's article and Douban hot movie and zhihu daily newspaper.
162 stars 52 forks source link

ava.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setLayoutManager(android.support.v7.widget.RecyclerView$LayoutManager)' on a null object reference #2

Closed tangnuo closed 7 years ago

tangnuo commented 7 years ago

09-28 11:51:35.239 28429-28429/com.xyz.leeeyou.zhihuribao E/AndroidRuntime: FATAL EXCEPTION: main Process: com.xyz.leeeyou.zhihuribao, PID: 28429 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setLayoutManager(android.support.v7.widget.RecyclerView$LayoutManager)' on a null object reference at com.xyz.leeeyou.zhihuribao.view.fragment.OneFragment.onCreateView(OneFragment.kt:48) at android.support.v4.app.Fragment.performCreateView(Fragment.java:2184) at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1298) at android.support.v4.app.FragmentManagerImpl.moveFragmentsToInvisible(FragmentManager.java:2323) at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2136) at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2092) at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1969) at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:620) at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:166) at android.support.v4.view.ViewPager.populate(ViewPager.java:1268) at android.support.v4.view.ViewPager.populate(ViewPager.java:1116) at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1642) at android.view.View.measure(View.java:19861) at in.srain.cube.views.ptr.PtrFrameLayout.measureContentView(PtrFrameLayout.java:224) at in.srain.cube.views.ptr.PtrFrameLayout.onMeasure(PtrFrameLayout.java:202) at android.view.View.measure(View.java:19861) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6083) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464) at android.widget.LinearLayout.measureVertical(LinearLayout.java:758) at android.widget.LinearLayout.onMeasure(LinearLayout.java:640) at android.view.View.measure(View.java:19861) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6083) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464) at android.widget.LinearLayout.measureVertical(LinearLayout.java:758) at android.widget.LinearLayout.onMeasure(LinearLayout.java:640) at android.view.View.measure(View.java:19861) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6083) at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139) at android.view.View.measure(View.java:19861) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6083) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464) at android.widget.LinearLayout.measureVertical(LinearLayout.java:758) at android.widget.LinearLayout.onMeasure(LinearLayout.java:640) at android.view.View.measure(View.java:19861) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6083) at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) at android.view.View.measure(View.java:19861) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6083) at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) at android.view.View.measure(View.java:19861) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6083) at android.widget.FrameLayout.onMeasure(FrameLayout.java:185) at com.android.internal.policy.DecorView.onMeasure(DecorView.java:692) at android.view.View.measure(View.java:19861) at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2275) at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1366) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1619) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1254) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6344) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:874) at android.view.Choreographer.doCallbacks(Choreographer.java:686) 09-28 11:51:35.239 28429-28429/com.xyz.leeeyou.zhihuribao E/AndroidRuntime: at android.view.Choreographer.doFrame(Choreographer.java:621) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:860) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) 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)

Jus7inLee commented 7 years ago

我是这样解决的->尝试把出错的这一段代码，放到onActivityCreated里面。（原因->控件还没有初始化成功就 调用setLinearLayoutManager的方法所以就报错了。）

Leeeyou commented 7 years ago

已修复，将下面这句放到initAdapter()中

recyclerViewOne?.layoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)