安卓APP内嵌网页，不支持viewport

Question

  var phoneWidth = parseInt(window.screen.width);
  var phoneScale = phoneWidth / 640;
  var ua = navigator.userAgent;
  if (/Android (\\d+\.\d+)/.test(ua)) {
    var version = parseFloat(RegExp.$1);
    // andriod 2.3
    if (version > 2.3) {
      document.write('<meta name="viewport" content="width=device-width, initial-scale = ' + phoneScale + ', maximum-scale = ' + phoneScale + ', target-densitydpi=device-dpi">');
    // andriod 2.3以上
    } else {
    document.write('<meta name="viewport" content="width=device-width,initial-scale = ' + phoneScale + ', maximum-scale = ' + phoneScale + ', target-densitydpi=device-dpi">');
    }
    // 其他系统
    } else {
    document.write('<meta name="viewport" content="width=device-width, initial-scale = ' + phoneScale + ', maximum-scale = ' + phoneScale + ',user-scalable=no, target-densitydpi=device-dpi">');
  }

这段代码在IOS自带浏览器，安卓自带浏览器，任意浏览器，IOS app 都支持，
唯独在安卓APP通过WebView内嵌网页，显示不支持，

Answer 1

....可能是你内嵌的app修改了ua.
不符合Android xx这样的