[{"createTime":1735734952000,"id":1,"img":"bandupan_350_218.jpg","link":"https://pan.baidu.com/s/1T03izdWtRSeMqOXoT9HCug?pwd=draw","name":"百度网盘下载","status":9,"txt":"百度网盘下载","type":1,"updateTime":1735747411000,"userId":3},{"createTime":1736173885000,"id":2,"img":"txy_480_300.png","link":"https://cloud.tencent.com/act/cps/redirect?redirect=1077&cps_key=edb15096bfff75effaaa8c8bb66138bd&from=console","name":"腾讯云秒杀","status":9,"txt":"腾讯云限量秒杀","type":1,"updateTime":1736173885000,"userId":3},{"createTime":1736177492000,"id":3,"img":"aly_251_140.png","link":"https://www.aliyun.com/minisite/goods?userCode=pwp8kmv3","memo":"","name":"阿里云","status":9,"txt":"阿里云2折起","type":1,"updateTime":1736177492000,"userId":3},{"createTime":1735660800000,"id":4,"img":"vultr_560_300.png","link":"https://www.vultr.com/?ref=9603742-8H","name":"Vultr","status":9,"txt":"Vultr送$100","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":5,"img":"jdy_663_320.jpg","link":"https://3.cn/2ay1-e5t","name":"京东云","status":9,"txt":"京东云特惠专区","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":6,"img":"qk_443_300.png","link":"https://pan.quark.cn/s/6229b93c70d0","name":"夸克网盘","status":9,"txt":"夸克网盘","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":7,"img":"yun_910_50.png","link":"https://activity.huaweicloud.com/discount_area_v5/index.html?fromacct=261f35b6-af54-4511-a2ca-910fa15905d1&utm_source=aXhpYW95YW5nOA===&utm_medium=cps&utm_campaign=201905","name":"底部","status":9,"txt":"高性能云服务器2折起","type":2,"updateTime":1735660800000,"userId":3}]
未取消注册或回调导致内存泄露
比如我们在 Activity 中注册广播，如果在 Activity 销毁后不取消注册，那么这个刚播会一直存在
系统中，同上面所说的非静态内部类一样持有 Activity 引用，导致内存泄露。因此注册广播后在
Activity 销毁后一定要取消注册。
public class MainActivity extends AppCompatActivity { @Override protected void
onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); this.registerReceiver(mReceiver, new
IntentFilter()); } private BroadcastReceiver mReceiver = new
BroadcastReceiver() { @Override public void onReceive(Context context, Intent
intent) { // 接收到广播需要做的逻辑 } }; @Override protected void onDestroy() {
super.onDestroy(); this.unregisterReceiver(mReceiver); } }
在注册观察则模式的时候，如果不及时取消也会造成内存泄露。比如使用 Retrofit+RxJava 注册网
络请求的观察者回调，同样作为匿名内部类持有外部引用，所以需要记得在不用或者销毁的时候
取消注册。
