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java.lang.NullPointerException: 	at org.json.JSONTokener.nextCleanInternal(JSONTokener.java:116)	at org.json.JSONTokener.nextValue(JSONTokener.java:94)	at org.json.JSONObject.(JSONObject.java:154)	at org.json.JSONObject.(JSONObject.java:171)	at com.dl.domo.arduino.showList(arduino.java:342)	at com.dl.domo.arduino$1LoginAsync.onPostExecute(arduino.java:411)	at com.dl.domo.arduino$1LoginAsync.onPostExecute(arduino.java:370)	at android.os.AsyncTask.finish(AsyncTask.java:631)	at android.os.AsyncTask.access$600(AsyncTask.java:177)	at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)	at android.os.Handler.dispatchMessage(Handler.java:99)	at android.os.Looper.loop(Looper.java:176)	at android.app.ActivityThread.main(ActivityThread.java:5319)	at java.lang.reflect.Method.invokeNative(Native Method)	at java.lang.reflect.Method.invoke(Method.java:511)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)	at dalvik.system.NativeStart.main(Native Method)