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Android 控件WebView显示网页
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; } }
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 =http://www.mamicode.com/"";} </script> </head> <body><form action="/Html5Studio/action/GetHtml5Form" method="post" id="register" ></form> username: <input type="text" id="inputName" name="inputName" form="register" value=http://www.mamicode.com/""/> <br/> year: <select name="inputYear" form="register" > <option value=http://www.mamicode.com/"2013">2013</option> <option value=http://www.mamicode.com/"2014">2014</option> </select> <br/> description: <textarea name="inputDescription" form="register" value=http://www.mamicode.com/"" ></textarea> <br/> <hr/> Email: <input type="email" name="inputEmail" form="register" value=http://www.mamicode.com/"" required placeholder="请输入合法的Email."/> <br/> Url: <input type="url" name="inputUrl" form="register" value=http://www.mamicode.com/"" /><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=http://www.mamicode.com/"1" id="inputNumber" name="inputNumber"/><br/> Range: <input type="range" min="1" max="10" step="2" value=http://www.mamicode.com/"1" id="inputRanage" name="inputRanage" onClick="showRangeValue1()" /> <div id="showRange"></div> <br/> Search: <input type="search" value=http://www.mamicode.com/"" name="inputSearch" results="n"/> <br/> Color: <input type="color" name="inputColor"/> <br/> Tel: <input type="tel" name="inputTel" value=http://www.mamicode.com/"" /> <br/> <input type="submit" value=http://www.mamicode.com/"Submit" form="register" /> <input type="reset" onclick="formReset()" value=http://www.mamicode.com/"Reset" form="register"/> <input type="button" onclick="formReset()" value=http://www.mamicode.com/"Reset form"> <input type="button" value=http://www.mamicode.com/"SayHello" onclick="SayHello()"> <input type="button" value=http://www.mamicode.com/"testJS" onclick="testJS()"> <div id="testDiv"></div> </body></html>
Android 控件WebView显示网页
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