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Attempt to invoke interface method 'boolean java.sql.ResultSet.next()' on a null object reference
java.lang.NullPointerException: Attempt to invoke interface method 'booleanjava.sql.ResultSet.next()' on a null object reference at com.example.nikhil.soundofmusic.DatabaseConnectivity.onPostExecute(MainActivity.java:157) at com.example.nikhil.soundofmusic.DatabaseConnectivity.onPostExecute(MainActivity.java:123) at android.os.AsyncTask.finish(AsyncTask.java:636) at android.os.AsyncTask.access$500(AsyncTask.java:177) at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:653) at android.os.Handler.dispatchMessage(Handler.java:102) 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) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)