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Unfortunately my app has stop

nhel clamor 1902 19-Jun-2015
guys, please help me with this, I am trying to create an email app without user interaction, I copied this code and follow everything they say, but my app always unfortunately stop.


06-19 05:59:03.072: E/AndroidRuntime(5479): FATAL EXCEPTION: AsyncTask #2
06-19 05:59:03.072: E/AndroidRuntime(5479): Process: com.example.disapp, PID: 5479
06-19 05:59:03.072: E/AndroidRuntime(5479): java.lang.RuntimeException: An error occured while executing doInBackground()
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at android.os.AsyncTask$3.done(AsyncTask.java:300)
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at java.util.concurrent.FutureTask.run(FutureTask.java:242)
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at java.lang.Thread.run(Thread.java:841)
06-19 05:59:03.072: E/AndroidRuntime(5479): Caused by: java.lang.NoClassDefFoundError: javax.activation.DataHandler
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at com.example.disapp.GMailSender.sendMail(GMailSender.java:59)
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at com.example.disapp.Home$MyAsyncClass.doInBackground(Home.java:416)
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at com.example.disapp.Home$MyAsyncClass.doInBackground(Home.java:1)
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at android.os.AsyncTask$2.call(AsyncTask.java:288)
06-19 05:59:03.072: E/AndroidRuntime(5479): 	at java.util.concurrent.FutureTask.run(FutureTask.java:237)
06-19 05:59:03.072: E/AndroidRuntime(5479): 	... 4 more
06-19 05:59:03.092: W/ActivityManager(373):   Force finishing activity com.example.disapp/.Home

android android 
Updated on 22-Jun-2015
nhel clamor

nhel clamor

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1 Answers

Manoj Pandey

Manoj Pandey

22-Jun-2015

  If you copied code from this link then you have need to some changes in your code and i have already changed my code you can see.

Remove toast from Void doInBackground(Void... mApi) 

You cannot show toast on doInBackground() method here 

  because there is dialog already running, you have need to remove toast from here and add on onPostExecute( ). 


  @Override
		protected void onPostExecute(Void result) {
			super.onPostExecute(result);
			pDialog.cancel();
			Toast.makeText(MainActivity.this, "Email send", Toast.LENGTH_LONG)
					.show();
		}

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