Bind Service

                                     Bind Service



Method for starting the bind service:
BindService(intent,service connection,flags);

Method for disconnect the bind service:

UnbindService(Service connected);

Implement ServiceConnection:

Your implementation must override two callback methods:

onServiceConnected()

•  The system calls this to deliver the IBinder returned by the service's

onServiceDisconnected()

• The Android system calls this when the connection to the service is 

        unexpectedly lost, such as when the service has crashed or has been killed. This is not called when the client unbinds.

Lifecycle for Bind Service:

• A bound service is an implementation of the Service class that allows other applications to bind to it and interact with it.

• To provide binding for a service, you must implement the onBind()callback method.

• This method returns an IBinder object that defines the programming interface that clients can use to interact with the service.

Example program :

It is a xml file:

<RelativeLayout

xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

    android:layout_height="match_parent"

android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    android:paddingBottom="@dimen/activity_vertical_margin"

tools:context=".MainActivity">

    <Button

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="bindservice"

      android:onClick="bind"

        android:id="@+id/button"

        android:layout_centerVertical="true"

        android:layout_centerHorizontal="true" />

</RelativeLayout>

In MainActivity we call the serice :

public class MainActivity extends AppCompatActivity implements

ServiceConnection {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

    @Override

    public void onServiceConnected(ComponentName name, IBinder

service) {

        MyService.MyBinder myBinder = (MyService.MyBinder)service;

        MyService s = (MyService)myBinder.getService();

        Toast.makeText(MainActivity.this,"service

connected"+s.getvalue(),Toast.LENGTH_LONG).show();

    }

    @Override

    public void onServiceDisconnected(ComponentName name) {

    }

    public void bind(View v){

        Intent intent=new Intent(MainActivity.this,MyService.class);

        bindService(intent,MainActivity.this,BIND_AUTO_CREATE);

    }

}

It is a Service:

public class MyService extends Service {

    private int a = 10;

    public MyService() {

    }

    public IBinder mBinder = new MyBinder();

    class MyBinder extends Binder {

        MyService getService() {

            return MyService.this;

        }

    }

    @Override

    public IBinder onBind(Intent intent) {

        return mBinder;

    }

    public int getvalue() {

return a;

    }

    @Override

    public boolean onUnbind(Intent intent) {

        return true;

    }

    @Override

    public void onRebind(Intent intent) {

        super.onRebind(intent);

    }

}

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