java.lang.NullPointerException

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    • java.lang.NullPointerException: Attempt to invoke virtual method 'android.app.ActivityThread$ApplicationThread android.app.ActivityThread.getApplicationThread()' on a null object reference at android.app.Activity.startActivityForResult(Activity.java:3736) at android.app.Activity.startActivityForResult(Activity.java:3697) at android.app.Activity.startActivity(Activity.java:4007) at android.app.Activity.startActivity(Activity.java:3975) at com.dogra.booker.UI.Model.CategoryButtonOnClickListener.callCategoryList(CategoryButtonOnClickListener.java:36) at com.dogra.booker.UI.Model.CategoryButtonOnClickListener.onClick(CategoryButtonOnClickListener.java:29) at android.view.View.performClick(View.java:4756) at android.view.View$PerformClick.run(View.java:19749) 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:5221) 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:899) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)

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