Use of Service in Android

Service startup method

Ordinary startup: write in the corresponding position in Activity

startService(new Intent(getBaseContext(),TestService.class));//启动服务

stopService(new Intent(getBaseContext(),TestService.class));//关闭服务

There are onCreate, onStartCommand, and onDestroy three methods in TestService

oncreate is only called when the service is created, that is, when the service is started for the first time

The onstartCommand method is called every time the service is started, which means that only the onstartCommand method is called when the service is repeatedly started

onDestroy is called when the service is stopped

 

Binding start:

       ServiceConnection serviceConnection=new ServiceConnection() {
            @Override
            public void onServiceConnected(ComponentName name, IBinder service) {
                Log.d("test", "onServiceConnected: ");
            }

            @Override
            public void onServiceDisconnected(ComponentName name) {
                Log.d("test", "onServiceDisconnected: ");
            }
       };

bindService(new Intent(this,AutoRefreshService.class),serviceConnection,BIND_AUTO_CREATE);

onCreate is the same as normal startup, only the first startup call

Binding startup will not call onStartCommand(), but onBind(), and multiple bindings will not call onbind() and onServiceconnected() repeatedly

When the Activity bound to the Service pops out of the stack (that is, finish()), the Service will automatically unbind and stop

So the service life cycle is: onCreate->onStartCommand/onBind->onDestroy