CODEWITHSUNDEEP
androidandroid-activityandroid-service
Dinesh Ravi
Dinesh Ravi

Reputation: 1225

How to access the instance of service object in onResume() part of an activity?

There is a service and activity.

Service class has one method 

methodA().

Now I have binded the service in Activity and got the instance of service through service connection.

problem is I can't access the instance of service inside onResume() method

Public void onResume(){
forExample.  mService.methodA // is throwing null pointer exception
}

update: This is how I created a service instance

class A extends Activity{
public ServiceClass mService = null; // service objecct
void onCreate(){
       Intent ServiceIntent = new Intent(this,BleWrapper.class);    
       bindService(ServiceIntent,mServiceConnection,BIND_AUTO_CREATE);
       mLeService = BLEService.getInstance();
} 
Public void onResume(){
  mService.methodA // is throwing null pointer exception
}
}

my Service connection is 

public final ServiceConnection mServiceConnection= new ServiceConnection() {  
    @Override
    public void onServiceConnected(ComponentName componentName, IBinder service) {
        mService = ((BleWrapper.LocalBinder) service).getService();
)

Can any one please help me.

Upvotes: 0

Views: 1052

Answers (2)

Apurva
Apurva

Reputation: 7901

Of course it would throw NullPointerException because you have not initialized a service at all.

Initialize a service in onCreate() method, And then you can use mService.methodA() on onResume()

class A extends Activity{
    public ServiceClass mService = null; // service objecct

    public void onCreate(){
        mService = new ServiceClass();
    }

    public void onResume(){
        mService.methodA();
    }
}

Note : Whenever you create any object, it must be initialized before getting used.

Upvotes: 1

Surya
Surya

Reputation: 638

You can get the instance of that service somewhere else in your Activity. The result can be given to the onResume() method.

Upvotes: 1

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