IMusicServiceStub弱引用service

[MoYuFly]

public class IMusicServiceStub extends IMusicService.Stub {
private static final String TAG = "IMusicServiceStub";
private final WeakReference mService;

作者，你好，这里的mService弱引用，好像并不能被gc回收，我在MainActivity，写了计时器，没三秒触发一次GC,但是这个mService hashcode一直没有变过，是否这个弱引用无效呢？
不停触发GC
private Handler handler = new Handler() {
@OverRide
public void handleMessage(Message msg) {
super.handleMessage(msg);
LogUtil.e(TAG, "触发GC");
handler.sendEmptyMessageDelayed(1, 3000);
System.gc();
}
};
由于对弱引用不太了解，所以想问下，弱引用在使用过程中被GC回收了，该怎么办，重新生成弱引用对象吗？
希望解惑，谢谢。
2020-05-22 10:32:42.426 22107-22107/com.cyl.musiclake E/IMusicServiceStub: HashCode=98214344
2020-05-22 10:32:43.346 22107-22107/com.cyl.musiclake E/MainActivity: 触发GC
2020-05-22 10:32:46.356 22107-22107/com.cyl.musiclake E/MainActivity: 触发GC
2020-05-22 10:32:49.221 22107-22107/com.cyl.musiclake E/IMusicServiceStub: HashCode=98214344
2020-05-22 10:32:49.377 22107-22107/com.cyl.musiclake E/MainActivity: 触发GC
2020-05-22 10:32:50.855 22107-22107/com.cyl.musiclake E/IMusicServiceStub: HashCode=98214344
2020-05-22 10:32:52.383 22107-22107/com.cyl.musiclake E/MainActivity: 触发GC
2020-05-22 10:32:53.146 22107-22107/com.cyl.musiclake E/IMusicServiceStub: HashCode=98214344
2020-05-22 10:32:54.384 22107-22107/com.cyl.musiclake E/IMusicServiceStub: HashCode=98214344
2020-05-22 10:32:55.413 22107-22107/com.cyl.musiclake E/MainActivity: 触发GC
2020-05-22 10:32:56.875 22107-22107/com.cyl.musiclake E/IMusicServiceStub: HashCode=98214344
2020-05-22 10:32:58.131 22107-22107/com.cyl.musiclake E/IMusicServiceStub: HashCode=98214344