webviewTemplate.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>test webview</title>
    <script>
    function jsCallJava() {
      const sendMessageEle = document.querySelector('#sendMessage')
      const message = sendMessageEle.value || '你好啊'
      // alert(message)
      window.testWebView && window.testWebView.jsCallJava(message)
    }
    function javaCallJs (message) {
      const receiveMessageEle = document.querySelector('#receiveMessage')
      // alert(message)
      receiveMessageEle.innerHTML = message
    }
  </script>
</head>
<body>
<h1 style="margin-top: 50px">这里是webview</h1>
<div>
    <p id="receiveMessage">这里接收到java调用js方法的信息</p>
</div>
<div>
    <input id="sendMessage" value="" type="text">
    <button type="button" onclick="jsCallJava()">测试js调用java方法</button>
</div>
</body>
</html>