Question

I’m trying to call outsider class from service but encounter error like “null pointer exception”. Here is simple code for that.

here is outsider class.

public class SyncTask {
    private Context context;

    public SyncTask(Context context, String agrs) {
        this.context = context;
    }       

    protected String ProcessSycn(String agrs) {     
        return agrs + " -  call successful.";
    }    
}

here is service class.

public class SyncService extends Service{   
    public SyncTask syncme;
    public String i;

    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void onStart(Intent intent, int startId) {
        // TODO Auto-generated method stub
        super.onStart(intent, startId);                
        i = syncme.ProcessSycn(3 + "");                                 
        this.stopSelf();
    }    


    @Override
    public void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
    }    
}

Answer 1

You never initialize the variable syncme. You need something like:

syncme = new SyncTask(this, "arguments");