WebView控件
WebView：可以直接加载网页。
webview 可以把一个java对象传递给网页，让javascript调用这个对象里面的方法。
具体示例demo html代码：
1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2 <html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5 <title>Insert title here</title> 6 <script type="text/javascript"> 7 function show(jsondata){// [{name:"xxx",amount:600,phone:"13988888"},{name:"bb",amount:200,phone:"1398788"}] 8 var jsonobjs = eval(jsondata); 9 var table = document.getElementById("personTable"); 10 for(var y=0; y<jsonobjs.length; y++){ 11 var tr = table.insertRow(table.rows.length); //添加一行 12 //添加三列 13 var td1 = tr.insertCell(0); 14 var td2 = tr.insertCell(1); 15 td2.align = "center"; 16 var td3 = tr.insertCell(2); 17 td3.align = "center"; 18 //设置列内容和属性 19 td1.innerHTML = jsonobjs[y].name; 20 td2.innerHTML = jsonobjs[y].amount; 21 td3.innerHTML = "<a href='javascript:contact.call(\""+ jsonobjs[y].phone+ "\")'>"+ jsonobjs[y].phone+ "</a>"; 22 } 23 } 24 </script> 25 26 </head> 27 <!-- js代码通过webView调用其插件中的java代码 --> 28 <body onload="javascript:contact.showcontacts()"> 29 <table border="0" width="100%" id="personTable" cellspacing="0"> 30 <tr> 31 <td width="35%">姓名</td><td width="30%" align="center">存款</td><td align="center">电话</td> 32 </tr> 33 </table> 34 <a href="javascript:window.location.reload()">刷新</a> 35 </body> 36 37 </html>
布局文件：
1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 android:layout_width="match_parent" 3 android:layout_height="match_parent" 4 android:orientation="vertical" 5 > 6 7 <WebView 8 android:id="@+id/webview" 9 android:layout_width="match_parent" 10 android:layout_height="match_parent" 11 /> 12 13 </LinearLayout>
MainActivity代码：
1 package com.android.hzy.webview; 2 3 import java.util.List; 4 5 import org.json.JSONArray; 6 import org.json.JSONException; 7 import org.json.JSONObject; 8 9 import android.app.Activity; 10 import android.content.Intent; 11 import android.net.Uri; 12 import android.os.Bundle; 13 import android.webkit.WebView; 14 15 import com.android.hzy.domain.ContactInfo; 16 import com.android.hzy.service.ContactService; 17 18 public class MainActivity extends Activity { 19 20 private WebView webview; 21 private ContactService service; 22 23 @Override 24 protected void onCreate(Bundle savedInstanceState) { 25 super.onCreate(savedInstanceState); 26 setContentView(R.layout.activity_main); 27 28 webview = (WebView) findViewById(R.id.webview); 29 service = new ContactService(); 30 31 // 给webview传递一个java对象 32 webview.addJavascriptInterface(new ContactPulgin(), "contact"); 33 // webview能够执行javascript代码 34 webview.getSettings().setJavaScriptEnabled(true); 35 36 // 加载本地网页 37 // webview.loadUrl("file:///android_asset/index.html"); 38 // 加载网页 39 webview.loadUrl("http://192.168.1.102:8080/web/"); 40 } 41 42 private final class ContactPulgin { 43 // 获取联系人的数据 javascript代码调用java代码 44 public void showcontacts() { 45 try { 46 List<ContactInfo> contacts = service.getContact(); 47 48 JSONArray jsonArray = new JSONArray(); 49 for (int i = 0; i < contacts.size(); i++) { 50 JSONObject jsonObject = new JSONObject(); 51 ContactInfo info = contacts.get(i); 52 jsonObject.put("name", info.getName()); 53 jsonObject.put("amount", info.getAmount()); 54 jsonObject.put("phone", info.getPhone()); 55 jsonArray.put(jsonObject); 56 } 57 String json = jsonArray.toString(); 58 // 在前面必须加上javascript: 说明是调用的javascript代码 59 webview.loadUrl("javascript:show(" + json + ")"); 60 } catch (Exception e) { 61 // TODO Auto-generated catch block 62 e.printStackTrace(); 63 } 64 } 65 66 public void call(String phone){ 67 Intent intent = new Intent(Intent.ACTION_CALL,Uri.parse("tel:"+phone)); 68 startActivity(intent); 69 } 70 } 71 72 }
模拟的数据：
1 package com.android.hzy.service; 2 3 import java.util.ArrayList; 4 import java.util.List; 5 6 import com.android.hzy.domain.ContactInfo; 7 /** 8 * 模拟的数据 9 */ 10 public class ContactService { 11 12 public List<ContactInfo> getContact() { 13 14 List<ContactInfo> contactInfos = new ArrayList<ContactInfo>(); 15 contactInfos.add(new ContactInfo("小强", 10000, "13111111111")); 16 contactInfos.add(new ContactInfo("小明", 20000, "13222222222")); 17 contactInfos.add(new ContactInfo("小红", 30000, "13333333333")); 18 contactInfos.add(new ContactInfo("小白", 40000, "13444444444")); 19 contactInfos.add(new ContactInfo("小东", 50000, "13555555555")); 20 contactInfos.add(new ContactInfo("小西", 60000, "13666666666")); 21 return contactInfos; 22 } 23 }
1 package com.android.hzy.domain; 2 3 public class ContactInfo { 4 5 private String name; 6 private long amount; 7 private String phone; 8 9 public ContactInfo(String name, long amount, String phone) { 10 super(); 11 this.name = name; 12 this.amount = amount; 13 this.phone = phone; 14 } 15 16 public String getName() { 17 return name; 18 } 19 20 public void setName(String name) { 21 this.name = name; 22 } 23 24 public long getAmount() { 25 return amount; 26 } 27 28 public void setAmount(long amount) { 29 this.amount = amount; 30 } 31 32 public String getPhone() { 33 return phone; 34 } 35 36 public void setPhone(String phone) { 37 this.phone = phone; 38 } 39 40 @Override 41 public String toString() { 42 return "ContactInfo [name=" + name + ", amount=" + amount + ", phone=" 43 + phone + "]"; 44 } 45 46 }
【注】：在2.3.3模拟器中，用webview去调用javascript代码会直接挂掉，应用退出，这个是BUG，在2.2以及别的版本不会有此问题，真机2.3.3木有测试！
