Android中Activity和Service的绑定（二）

public class BinderActivity extends Activity {

    private Button startBinderServices;
    private Button stopBinderServices;
    private Boolean isConnected = false;

    protected void onCreate(Bundle savedInstanceState) {
        
        super.onCreate(savedInstanceState);
        setContentView(R.layout.binder);
        startBinderServices = (Button) findViewById(R.id.btnstartBinderServices);
        stopBinderServices = (Button) findViewById(R.id.btnstopBinderServices);
        startBinderServices.setOnClickListener(listener);
        stopBinderServices.setOnClickListener(listener);
    }

    private OnClickListener listener = new OnClickListener() {

        public void onClick(View v) {
            
            switch (v.getId()) {
            case R.id.btnstartBinderServices:
                bindService();
                break;

            case R.id.btnstopBinderServices:
                unbind();
                break; 

            default:
                break;
            }
        }
    };

    private void unbind() {

        if (isConnected) {

            unbindService(conn);
            isConnected = false;
        }
    } 

    private void bindService() {

        Intent intent = new Intent(BinderActivity.this, BindService.class);
        bindService(intent, conn, Context.BIND_AUTO_CREATE);
    }
    
    private ServiceConnection conn = new ServiceConnection() {
        
        public void onServiceDisconnected(ComponentName name) {
            
            isConnected = false;
        }
        
        public void onServiceConnected(ComponentName name, IBinder binder) {

            MyBinder myBinder = (MyBinder)binder;
            BindService service = myBinder.getService();
            isConnected = true;
            service.MyMethod();
        }
    };

}