● 更改TopOn后台配置之后，大概需要多久生效？
后台配置一般会5分钟左右生效，请耐心等待一下，然后请卸载并重新安装应用进行测试
● 广告平台的广告有效时间是多久？
加载回来的广告会有一个缓存有效期，不同广告平台不一样，一般为半小时或一小时的缓存有效期，用户不需要关心广告是否过期，SDK内部会在加载和展示的时候进行判断，过期不会展示。
● 流量分组没有生效？
- 如果是配置了自定义规则的情况，请检查代码中是否已经正确传入自定义规则，可在代码中打印出key、value进行排查
- 如果是配置了设备ID的情况，请检查TopOn后台配置的设备ID是否正确
● 广告加载到收到回调的时间过长
- 检查网络是否正常；
- 广告位下配置了过多的广告源，SDK会顺序请求这些广告源，如果所有广告源均失败，这将耗费大量时间，SDK最后才会回调失败，所以请优化广告位下的广告源配置，请参考这里
● TopOn有没有提前关闭广告的接口方法？
目前各广告平台不提供提前关闭广告的方法
● 如果APP进程被杀了，SDK会把已经缓存但还未展示的广告清空吗？
会的，广告缓存是在内存，杀掉程序就没有了
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