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HTML5学习总结-10 Android 控件WebView显示网页

2016-09-03 17:20 477 查看

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="2013">2013</option>
<option value="2014">2014</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="1" max="10" step="2" value="1" id="inputNumber" name="inputNumber"/><br/>
Range: <input type="range" min="1" max="10" step="2" value="1" 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

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