java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference

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    • java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference at android.widget.Toast.<init>(Toast.java:102) at android.widget.Toast.makeText(Toast.java:259) at com.example.nkwpy.myapplication.MainFragment.query(MainFragment.java:176) at com.example.nkwpy.myapplication.MainFragment.access$000(MainFragment.java:46) at com.example.nkwpy.myapplication.MainFragment$queryListener.onClick(MainFragment.java:161) at android.view.View.performClick(View.java:5207) at android.view.View$PerformClick.run(View.java:21177) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5458) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:738) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:628)

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