MyService
public class MyService extends Service {
private final int JOB1 = 1;
private final int JOB1Response = 2;
private final int JOB2 = 3;
private final int JOB2Response = 4;
Messenger messenger = new Messenger(new MyServiceHandler());
@Nullable
@Override
public IBinder onBind(Intent intent) {
return messenger.getBinder();
}
class MyServiceHandler extends Handler {
Message MSG;
String message;
Bundle bundle = new Bundle();
@Override
public void handleMessage(Message msg) {
try {
switch (msg.what) {
case JOB1:
message = "This is the first message from service";
MSG = Message.obtain(null, JOB1Response);
bundle.putString("responseMessage", message);
MSG.setData(bundle);
msg.replyTo.send(MSG);
break;
case JOB2:
message = "This is the second message from service";
MSG = Message.obtain(null, JOB2Response);
bundle.putString("responseMessage", message);
MSG.setData(bundle);
msg.replyTo.send(MSG);
break;
default:
super.handleMessage(msg);
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
}
MainActivity
public class MainActivity extends AppCompatActivity {
private final int JOB1 = 1;
private final int JOB1Response = 2;
private final int JOB2 = 3;
private final int JOB2Response = 4;
Messenger messenger = null;
boolean isBound = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = new Intent(this, MyService.class);
bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);
}
ServiceConnection serviceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
messenger = new Messenger(service);
isBound = true;
}
@Override
public void onServiceDisconnected(ComponentName name) {
messenger = null;
isBound = false;
}
};
// JOB1
private void sendMessage1() {
try {
if (isBound){
Message msg = Message.obtain(null, JOB1);
msg.replyTo = new Messenger(new MainActivityHandler());
messenger.send(msg);
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
// JOB2
private void sendMessage2() {
try {
if (isBound){
Message msg = Message.obtain(null, JOB2);
msg.replyTo = new Messenger(new MainActivityHandler());
messenger.send(msg);
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
private void LogMessage1(String msg)
{
Log.d("MSG",msg);
}
@Override
protected void onStop() {
unbindService(serviceConnection);
isBound = false;
messenger = null;
super.onStop();
}
class MainActivityHandler extends Handler {
@Override
public void handleMessage(Message msg) {
String message;
switch (msg.what) {
case JOB1Response:
message = msg.getData().getString("responseMessage");
// do something here
LogMessage1(message);
break;
case JOB2Response:
message = msg.getData().getString("responseMessage");
// do something here
break;
default:
super.handleMessage(msg);
}
}
}
}
AndroidManifest.xml
<service android:name=".MyService" android:process=":remote"/>
References
https://www.youtube.com/watch?v=yAmnirP0d4U&t=0s&list=PLshdtb5UWjSp0879mLeCsDQN6L73XBZTk
https://developer.android.com/guide/components/bound-services