Android 11 webview webrtc无法使用问题

问题：Android 11 webview 调用webrtc无法使用, 看logcat日志会报如下错误

[ERROR:address_tracker_linux.cc(245)] Could not send NETLINK request: Permission denied (13)

查了下相关的网络权限都有配置了还是不行，还是报这个权限问题

原因：跟 android11 限制读网卡信息有关系， 算webview的一个兼容bug 

https://developer.android.com/about/versions/11/privacy/mac-address

解决： 

方案一： 可以修改app 的targetSdkVersion小于30 

方案二：发现第一次发起连接失败后再连接就正常了，所以在正式连接之前发起一次连接

async function connect() {if (getAndroidVersion() === 11) {await this.fixAndroid({iceServers,iceCandidatePoolSize: 1, //  这里要设置1， 不设1也连不上，不知道为什么})}// 发起正式连接// let peer = new RTCPeerConnection(turn);// ......}function getAndroidVersion() {// 获取设备信息const deviceInfo = navigator.userAgent;// 解析设备信息const androidVersion = deviceInfo.match(/Android ([\d.]+)/);if (androidVersion && androidVersion!.length === 2) {return Number(androidVersion![1])}// 返回系统版本号return null;
};async fixAndroid(turn: any) {console.log("fixing android webrtc bug");return new Promise(async (resolve, reject) => {try {let peer = new RTCPeerConnection(turn);let offer = await peer.createOffer({offerToReceiveAudio: true,offerToReceiveVideo: true})let rtcDesc = new RTCSessionDescription(offer);await peer.setLocalDescription(rtcDesc);setTimeout(()=> {peer.close()console.log("fixAndroid close")resolve()}, 1000)} catch (e) {resolve()console.error("fixAndroid", e)}})}

参考：

• https://stackoverflow.com/questions/70803796/ice-candidates-not-generating-on-android-11-chrome-in-some-devices
• https://issues.chromium.org/issues/40194180