至简原生与webview交互逻辑演示

var callbackstack = {};
var callbackId=0;
function getToken() {
    callbackId++;
    return new Promise((rs, rj) => {
        window.android.postToNative('getToken',{callbackid:callbackid});
        callbackstack['callbck'+callbackid] = rs;
    });
}

function callbackFromNative(callBackId, status, msg) {
    if(callbackstack['callbck'+callBackId]){
        callbackstack['callbck'+callBackId](msg);
    }
    throw 'callback not found';
}