回调在service里的使用

ServiceConnection serviceConnection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder iBinder) {
            SpeedTestService.MyBinder binder = (SpeedTestService.MyBinder) iBinder;
            SpeedTestService service = binder.getService();
            service.setCallback(new SpeedTestService.Callback() {
                @Override
                public void setResult(String mDownloadSpeed, String mUploadSpeed) {
                    downloadSpeed = mDownloadSpeed;
                    uploadSpeed = mUploadSpeed;
                }
            });
        }
 
        @Override
        public void onServiceDisconnected(ComponentName name) {
 
        }
    };

Intent intent = new Intent(getContext(), SpeedTestService.class);
getContext().bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);

定义回调接口
public interface Callback{
        void setResult(String downloadSpeed,String uploadSpeed);
    }
 
    public void setCallback(Callback callback) {
        mCallback = callback;
    }

   public Callback mCallback;
 
    public class MyBinder extends Binder{
        public SpeedTestService getService(){
            return SpeedTestService.this;
        }
    }

mCallback.setResult(String.valueOf(downloadSpeed),String.valueOf(uploadSpeed));