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System services not available to Activities before onCreate()
java.lang.IllegalStateException: System services not available to Activities before onCreate() at android.app.Activity.getSystemService(Activity.java:5055) at android.app.Dialog.<init>(Dialog.java:164) at android.app.AlertDialog.<init>(AlertDialog.java:125) at android.app.AlertDialog.<init>(AlertDialog.java:121) at android.app.ProgressDialog.<init>(ProgressDialog.java:82) at com.exampe.CalcularHorariosComplejoAsyncTask.<init>(CalcularHorariosComplejoAsyncTask.java:78) at com.example.CalcularHorariosComplejoService.onHandleIntent(CalcularHorariosComplejoService.java:37) at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.os.HandlerThread.run(HandlerThread.java:61)