Question 126829 in Android Studio Question posted in
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Android Studio – How to correctly pass Arraylist to background service?

I want to pass the arraylist of all the phonenumbers created into the background service so that I can message them all at once when a shake gesture is triggered.

This is the MainActivity snippet where I use the intent.putExtra() method to pass my arraylist into the service.

SensorService sensorService = new SensorService();
            Intent intent = new Intent(this, sensorService.getClass());
            if(!isMyServiceRunning(sensorService.getClass())){
                startService(intent);
                intent.putExtra("ContactNumberList", Contact_Number);
                Toast.makeText(this, "Starting Service", Toast.LENGTH_SHORT).show();
            }

and this is the snippet for assigning the passed arraylist. in the SensorService

       DatabaseHelper db = new DatabaseHelper(SensorService.this);
       ArrayList<String> Contact_id, Contact_Name, Contact_Number;
       ArrayList<String> phonenumber = new ArrayList<String>();
       phonenumber = (ArrayList<String>)getIntent().getSerializableExtra("ContactNumberList");

I get the compiler error Cannot resolve method 'getIntent()'

I wanted to know if there is a better way to pass the created arraylist from the MainActivity to my background service ?

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2

Answers


  1. 0

    Try removing (ArrayList<String>) type cast. It should give you the option to import getIntent after that. If you need to type cast it, you can do it after you have the value.

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  2. 0

    You need two things:

    1. call "intent.putExtra(…)" BEFORE use that intent on startService()
    2. implement "onStartCommand(Intent intent…) { … } in your Service and use "intent" parameter (this method is called from MainThread/UiThread)
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