HTML5学习总结-10 Android 控件WebView显示网页

2022-11-29 10:32:30

WebView可以使得网页轻松的内嵌到app里，还可以直接跟js相互调用。

　　webview有两个方法：setWebChromeClient 和 setWebClient

1)setWebClient：主要处理解析，渲染网页等浏览器做的事情

　　WebViewClient就是帮助WebView处理各种通知、请求事件的。

2)setWebChromeClient：辅助WebView处理Javascript的对话框，网站图标，网站title，加载进度等。

1 在Activity_main.xml

添加一个WebView组件

<WebView

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:id="@+id/webView"

    />

2 在AndroidManifest.xml设置访问网络权限

<uses-permission android:name="android.permission.INTERNET" />

3 在MainActivity中设置可以与JS可交互性

package com.example.helloworld;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.webkit.WebChromeClient;

import android.webkit.WebSettings;

import android.webkit.WebView;

public class MainActivity extends Activity {

    private WebView webView;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        webView = (WebView) findViewById(R.id.webView);

        WebSettings webSetting = webView.getSettings();

        webSetting.setJavaScriptEnabled(true);

        webView.setWebChromeClient(new WebChromeClient());

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

}

3.1）加载外部资源：

package com.example.helloworld;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.webkit.WebChromeClient;

import android.webkit.WebSettings;

import android.webkit.WebView;

public class MainActivity extends Activity {

    private WebView webView;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        webView = (WebView) findViewById(R.id.webView);

        WebSettings webSetting = webView.getSettings();

        webSetting.setJavaScriptEnabled(true);

        webView.setWebChromeClient(new WebChromeClient());

       webView.loadUrl("http://baidu.com");

  }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

}

显示效果如下图所示：

3.2)加载本地资源

　　把oldForm.html页面放在assets目录下

package com.example.helloworld;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.webkit.WebChromeClient;

import android.webkit.WebSettings;

import android.webkit.WebView;

public class MainActivity extends Activity {

    private WebView webView;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        webView = (WebView) findViewById(R.id.webView);

        WebSettings webSetting = webView.getSettings();

        webSetting.setJavaScriptEnabled(true);

        webView.setWebChromeClient(new WebChromeClient());

               webView.loadUrl("file:///android_asset/oldForm.html");

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

}

oldForm.html

<!DOCTYPE html>

<html>

  <head>

    <title>oldForm.html</title>

<meta charset="utf-8" />

    <script type="text/javascript" languate="javascript">

      function showRangeValue1(){

            var inputRanage= document.getElementById("inputRanage").value;

            document.getElementById("showRange").innerHTML= inputRanage;

      }

      function SayHello(){

         alert("Hello guangzhou.");

      }

      function testJS(){

         document.getElementById("testDiv").innerHTML="Hello guangzhou! It is "+new Date();

      }

      function formReset()

{

document.getElementById("register").reset();

document.getElementById("inputName").value ="";

}

    </script>

  </head>

  <body>

<form action="/Html5Studio/action/GetHtml5Form" method="post" id="register" >

</form>

   username: <input type="text" id="inputName" name="inputName" form="register" value=""/> <br/>

   year: <select name="inputYear" form="register"  >

                <option value=""></option>

                <option value=""></option>

         </select> <br/>

   description: <textarea name="inputDescription" form="register" value="" ></textarea>  <br/>

 <hr/>

  Email: <input type="email" name="inputEmail" form="register" value="" required placeholder="请输入合法的Email."/> <br/>

  Url: <input type="url" name="inputUrl" form="register" value=""  /><br/>

 Date: <input type="date" name="inputDate" form="register"><br/>

 Time: <input type="time" name="inputTime" form="register"><br/>

 Month: <input type="month" name="inputMonth" form="register"><br/>

 Week: <input type="week" name="inputWeek" form="register"><br/>

 Number: <input type="number" min="" max="" step="" value="" id="inputNumber" name="inputNumber"/><br/>

 Range: <input type="range" min="" max="" step="" value="" id="inputRanage" name="inputRanage" onClick="showRangeValue1()" />

        <div id="showRange"></div> <br/>

 Search: <input type="search" value="" name="inputSearch" results="n"/> <br/>

 Color: <input type="color" name="inputColor"/>    <br/>

 Tel: <input type="tel" name="inputTel" value="" />    <br/> 

   <input type="submit" value="Submit"  form="register" />

   <input type="reset" onclick="formReset()"  value="Reset" form="register"/>

 <input type="button" onclick="formReset()" value="Reset form">

   <input type="button" value="SayHello" onclick="SayHello()">

   <input type="button" value="testJS" onclick="testJS()">

    <div id="testDiv"></div>

  </body>

</html>

参考资料：

http://pixy.iteye.com/blog/1044890

http://www.cnblogs.com/shawn-xie/archive/2012/08/15/2638480.html

码农公寓

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