<span style="font-size:18px;"><intent-filter> 
        <action android:name="android.intent.action.VIEW" /> 
        <category android:name="android.intent.category.DEFAULT" /> 
        <category android:name="android.intent.category.BROWSABLE" /> 
        <data  
      android:scheme="qiyimobile"  
      android:host="self/qiyi.madeindexpage"  
      android:pathPrefix="/**"> 
     </data> 
</intent-filter></span>

 var ifr = document.createElement('iframe');
 ifr.src = 'qiyimobile://self/qiyi.madeindexpage';
 document.body.appendChild(ifr);

window.location.href=“打开地址”
 setTimeout(function() {  
  window.location.href=“下载地址”
      }, 500);

downloadapp.addEventListener('click', function() {
      var start = new Date();//记录初始时间
      var t = 500;
      var ifr = document.createElement('iframe');
      ifr.src = 'qiyimobile://self/qiyi.madeindexpage';//打开app
      document.body.appendChild(ifr);
      ifr.onload = function() {
      };
      ifr.style.display='none';
      setTimeout(function() {
        document.body.removeChild(ifr);
        var end = new Date();//记录结束时间
        console.log(end - start)
        if (end - start <= (t + 30)) {//两者之差小于30ms时跳转到下载页
          window.location.href = "https://www.baidu.com"
        }
      }, t);
    })