解決“java.lang.NullPointerException:Attempt to read from field

解決異常 java.lang.NullPointerException: Attempt to read from field ‘int android.view.View.mViewFlags’ on a null object reference 記錄一下

很多資料都寫的是動畫加載問題
我自己的代碼沒有任何動畫 所以不存在動畫加載問題 那麼只能排查！最後發現是後臺數據返回不正確導致
正常是在返回data 和分頁 pageEntity 對象是有數據的！ 這次返回都是null 導致渲染數據沒有判空出現的問題

解決方式 接口請求回調方法中在渲染數據的時候判空就可以了 下面是異常信息

java.lang.NullPointerException: Attempt to read from field 'int android.view.View.mViewFlags' on a null object reference
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3197)
        at android.view.View.updateDisplayListIfDirty(View.java:14162)
        at android.view.View.getDisplayList(View.java:14189)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3389)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3368)
        at android.view.View.updateDisplayListIfDirty(View.java:14127)
        at android.view.View.getDisplayList(View.java:14189)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3389)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3368)
        at android.view.View.updateDisplayListIfDirty(View.java:14127)
        at android.view.View.getDisplayList(View.java:14189)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3389)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3368)
        at android.view.View.updateDisplayListIfDirty(View.java:14127)
        at android.view.View.getDisplayList(View.java:14189)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3389)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3368)
        at android.view.View.updateDisplayListIfDirty(View.java:14127)
        at android.view.View.getDisplayList(View.java:14189)
        at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:273)
        at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:279)
        at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:318)
        at android.view.ViewRootImpl.draw(ViewRootImpl.java:2554)
        at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2376)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2006)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1085)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5909)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
        at android.view.Choreographer.doCallbacks(Choreographer.java:580)
        at android.view.Choreographer.doFrame(Choreographer.java:550)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5305)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)