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Attempt to invoke virtual method 'int java.util.ArrayList.size()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.ArrayList.size()' on a null object reference	at com.wenming.weiswift.ui.login.fragment.message.mention.MentionActivity.showLoadFooterView(MentionActivity.java:209)	at com.wenming.weiswift.ui.login.fragment.message.mention.MentionActivity$5.onLoadNextPage(MentionActivity.java:134)	at com.wenming.weiswift.widget.endlessrecyclerview.EndlessRecyclerOnScrollListener.onScrollStateChanged(EndlessRecyclerOnScrollListener.java:91)	at android.support.v7.widget.RecyclerView.dispatchOnScrollStateChanged(RecyclerView.java:3972)	at android.support.v7.widget.RecyclerView.setScrollState(RecyclerView.java:1194)	at android.support.v7.widget.RecyclerView.access$3900(RecyclerView.java:147)	at android.support.v7.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:4110)	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:920)	at android.view.Choreographer.doCallbacks(Choreographer.java:695)	at android.view.Choreographer.doFrame(Choreographer.java:628)	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:906)	at android.os.Handler.handleCallback(Handler.java:739)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:158)	at android.app.ActivityThread.main(ActivityThread.java:7224)	at java.lang.reflect.Method.invoke(Native Method)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)	at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:134)