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java.lang.NullPointerException: null reference	at Source)	at Source)	at com.example.mark.prototype9.SubActivity.subscribe(	at com.example.mark.prototype9.SubActivity.onConnected(	at Source)	at Source)	at Source)	at Source)	at Source)	at Source)	at$1.onConnected(Unknown Source)	at$zzj.zzavj(Unknown Source)	at$zza.zzc(Unknown Source)	at$zza.zzv(Unknown Source)	at$zze.zzavl(Unknown Source)	at$zzd.handleMessage(Unknown Source)	at android.os.Handler.dispatchMessage(	at android.os.Looper.loop(	at	at java.lang.reflect.Method.invoke(Native Method)	at java.lang.reflect.Method.invoke(	at$	at