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Attempt to invoke interface method 'void com.example.deepak.meme_creator.TopFragment$TopSectionListener.createMeme(java.lang.String, java.lang.String)' on a null object reference
java.lang.NullPointerException: Attempt to invoke interface method 'void com.example.deepak.meme_creator.TopFragment$TopSectionListener.createMeme(java.lang.String, java.lang.String)' on a null object reference	at com.example.deepak.meme_creator.TopFragment.button_clicked(TopFragment.java:65)	at com.example.deepak.meme_creator.TopFragment$1.onClick(TopFragment.java:54)	at android.view.View.performClick(View.java:4780)	at android.view.View$PerformClick.run(View.java:19866)	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:5254)	at java.lang.reflect.Method.invoke(Native Method)	at java.lang.reflect.Method.invoke(Method.java:372)