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evrencoskun / TableView

TableView is a powerful Android library for displaying complex data structures and rendering tabular data composed of rows, columns and cells.
MIT License
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NPE with getAdapter() on hideColumn() #177

Open djdance opened 6 years ago

djdance commented 6 years ago

I installed official demo and added 1 string inside initializeTableView() after setAllItems():

mTableView.hideColumn(0);

and it crashed with the following. Why? The same I could reproduce and in my project.

E: FATAL EXCEPTION: main Process: com.evrencoskun.tableviewsample, PID: 13130 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.evrencoskun.tableviewsample/com.evrencoskun.tableviewsample.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.support.v7.widget.RecyclerView$Adapter com.evrencoskun.tableview.adapter.recyclerview.CellRecyclerView.getAdapter()' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3194) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3302) at android.app.ActivityThread.-wrap12(Unknown Source:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1891) at android.os.Handler.dispatchMessage(Handler.java:108) at android.os.Looper.loop(Looper.java:166) at android.app.ActivityThread.main(ActivityThread.java:7425) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:921) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.support.v7.widget.RecyclerView$Adapter com.evrencoskun.tableview.adapter.recyclerview.CellRecyclerView.getAdapter()' on a null object reference at com.evrencoskun.tableview.adapter.recyclerview.CellRecyclerViewAdapter.removeColumnItems(CellRecyclerViewAdapter.java:224) at com.evrencoskun.tableview.adapter.AbstractTableAdapter.removeColumn(AbstractTableAdapter.java:289) at com.evrencoskun.tableview.handler.VisibilityHandler.hideColumn(VisibilityHandler.java:95) at com.evrencoskun.tableview.TableView.hideColumn(TableView.java:528) at com.evrencoskun.tableviewsample.MainFragment.initializeTableView(MainFragment.java:144) at com.evrencoskun.tableviewsample.MainFragment.onCreateView(MainFragment.java:106) at android.support.v4.app.Fragment.performCreateView(Fragment.java:2261) at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1419) at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1750) at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1819) at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:797) at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2590) at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2377) at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2332) at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2239) at android.support.v4.app.FragmentManagerImpl.dispatchStateChange(FragmentManager.java:3231) at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:3181) at android.support.v4.app.FragmentController.dispatchActivityCreated(FragmentController.java:192) at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:572) at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:177) at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1339) at android.app.Activity.performStart(Activity.java:7392) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3157) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3302)  at android.app.ActivityThread.-wrap12(Unknown Source:0)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1891)  at android.os.Handler.dispatchMessage(Handler.java:108)  at android.os.Looper.loop(Looper.java:166)  at android.app.ActivityThread.main(ActivityThread.java:7425)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:921)