Html页面和Java代码结合的方式一般用在界面常常被更改 的情况下,能够讲html放在网络中。软件一打开就会訪问网络获取到最新的界面。
缺点是会受到网络信号的影响,从而导致訪问速度慢。
1.用WebView来显示HTML代码
2.同意WebView运行JavaScript
webView.getSettings().setJavaScriptEnabled(true);
3.获取到HTML文件,也可从网络中获取
webView.loadUrl("file:///android_asset/index.html"); //HTML文件存放在assets目录中
4.加入一个对象, 让JS能够訪问该对象的方法, 该对象中也能够调用JS中的方法
webView.addJavascriptInterface(new Contact(), "contact");
完整演示样例代码例如以下:
效果图:
MainActivity
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import android.app.Activity;
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import android.content.Intent;
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import android.net.Uri;
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import android.os.Bundle;
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import android.webkit.WebView;
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public class MainActivity extends Activity {
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private WebView webView;
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.main);
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webView = (WebView) findViewById(R.id.webView);
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webView.getSettings().setJavaScriptEnabled(true);
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webView.loadUrl("file:///android_asset/index.html");
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webView.addJavascriptInterface(new Contact(), "contact");
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}
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private final class Contact {
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public void call(String phone) {
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startActivity(new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + phone)));
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}
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public void showcontacts() {
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String json = "[{\"name\":\"zxx\", \"amount\":\"9999999\", \"phone\":\"18600012345\"}]";
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webView.loadUrl("javascript:show(‘" + json + "‘)");
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}
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}
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}
HTML:
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>Insert title here</title>
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<script type="text/javascript">
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function show(jsondata){
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var jsonobjs = eval(jsondata);
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var table = document.getElementById("personTable");
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for(var y=0; y<jsonobjs.length; y++){
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var tr = table.insertRow(table.rows.length);
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var td1 = tr.insertCell(0);
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var td2 = tr.insertCell(1);
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td2.align = "center";
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var td3 = tr.insertCell(2);
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td3.align = "center";
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td1.innerHTML = jsonobjs[y].name;
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td2.innerHTML = jsonobjs[y].amount;
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td3.innerHTML = "<a href=‘javascript:contact.call(\""+ jsonobjs[y].phone+ "\")‘>"+ jsonobjs[y].phone+ "</a>";
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}
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}
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</script>
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</head>
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<body onload="javascript:contact.showcontacts()">
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<table border="0" width="100%" id="personTable" cellspacing="0">
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<tr>
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<td width="30%">姓名</td>
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<td width="30%" align="center">存款</td>
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<td align="center">电话</td>
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</tr>
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</table>
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</body>
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</html>
拨打电话须要加入权限:
<uses-permission android:name="android.permission.CALL_PHONE" /