由于Android软件开发分工眼下还没有细化，程序猿往往须要负责软件界面的开发，尽管软件的界面图片已经由美工设计好了。可是假设使用layout技术把软件做成美丽的界面确实非常困难，而是也比較耗时。Android通过WebView实现了JS代码与Java代码互相通信的功能，使的Android软件的界面开发也能够採用HTML网页技术，这样，广大网页美工能够參与进Android软件的界面开发工作，从而让程序猿从中解脱出来。
project文件夹
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<WebView
android:id="@+id/webView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>index.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"/>
<title>Wty htmlUI</title>
<script type="text/javascript">
function show(jsondata){// [{name:"xxx",amount:600,phone:"13988888"},{name:"bb",amount:200,phone:"1398788"}]
var jsonobjs = eval(jsondata);
var table = document.getElementById("personTable");//找到personTable表
for(var y=0; y<jsonobjs.length; y++){
var tr = table.insertRow(table.rows.length); //追加一行
//加入三列
var td1 = tr.insertCell(0);
var td2 = tr.insertCell(1);
td2.align = "center";
var td3 = tr.insertCell(2);
td3.align = "center";
//设置列内容和属性
td1.innerHTML = jsonobjs[y].name;
td2.innerHTML = jsonobjs[y].amount;
td3.innerHTML = "<a href='javascript:contact.call(""+ jsonobjs[y].phone+ "")'>"+ jsonobjs[y].phone+ "</a>";
}
}
</script>
</head>
<!-- 页面载入的时候触发onload方法：js代码通过webView调用其插件中的java代码 -->
<!-- 自己定义js对象contact，调用里面的showcontacts()方法 -->
<body onload="javascript:contact.showcontacts()">
<table border="0" width="100%" id="personTable" cellspacing="0">
<tr>
<td width="35%">姓名</td><td width="30%" align="center">存款</td><td align="center">电话</td>
</tr>
</table>
<a href="javascript:window.location.reload()">刷新</a>
</body>
</html>
Contact.java
package cn.itcast.domain;
public class Contact {
private Integer id;
private String name;
private String phone;
private Integer amount;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public Integer getAmount() {
return amount;
}
public void setAmount(Integer amount) {
this.amount = amount;
}
public Contact(Integer id, String name, String phone, Integer amount) {
this.id = id;
this.name = name;
this.phone = phone;
this.amount = amount;
}
}
ContactService.java
package cn.itcast.service;
import java.util.ArrayList;
import java.util.List;
import cn.itcast.domain.Contact;
public class ContactService {
/**
* 获取联系人
* @return
*/
public List<Contact> getContacts(){
List<Contact> contacts = new ArrayList<Contact>();
contacts.add(new Contact(12, "张明", "13766666666", 13003));
contacts.add(new Contact(23, "小小", "130066006", 122003));
contacts.add(new Contact(98, "李小楷", "186768768", 10988787));
contacts.add(new Contact(76, "赵得", "1565622566", 1666));
return contacts;
}
}
MainActivity.java
package cn.itcast.html;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import cn.itcast.domain.Contact;
import cn.itcast.service.ContactService;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.webkit.WebView;
public class MainActivity extends Activity {
private WebView webView;
private ContactService contactService;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
webView = (WebView) this.findViewById(R.id.webView);
webView.loadUrl("file:///android_asset/index.html");
webView.getSettings().setJavaScriptEnabled(true);
webView.addJavascriptInterface(new JSObject(), "contact");//js对象是 JSObject()，名称为contact
contactService = new ContactService();
}
private final class JSObject{
public void call(String phone){
Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:"+ phone));
startActivity(intent);
}
public void showcontacts(){
// [{name:"xxx",amount:600,phone:"13988888"},{name:"bb",amount:200,phone:"1398788"}]
try {
List<Contact> contacts = contactService.getContacts();
JSONArray jsonArray = new JSONArray();
for(Contact c : contacts){
JSONObject jsonObject = new JSONObject();
jsonObject.put("name", c.getName());
jsonObject.put("amount", c.getAmount());
jsonObject.put("phone", c.getPhone());
jsonArray.put(jsonObject);
}
String json = jsonArray.toString();
webView.loadUrl("javascript:show('"+ json+ "')");
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}測试结果
