android 使用html5作布局文件
http://www.cnblogs.com/andgoo/archive/2011/10/11/2207936.html
Android中webview跟JAVASCRIPT中的交互
http://www.oschina.net/question/4873_27156
android软件开发之webView.addJavascriptInterface循环渐进【一】:
http://www.sollyu.com/android-software-development-webview-addjavascriptinterface-cycle-of-gradual-one
android软件开发之webView.addJavascriptInterface循环渐进【二】:
http://www.sollyu.com/586
WebView注入Java对象注意事项
在android4.2以前,注入步骤如下:
webview.getSetting().setJavaScriptEnable(true);
class JsObject {
public String toString() { return "injectedObject"; }
}
webView.addJavascriptInterface(new JsObject(), "injectedObject");
Android4.2及以后,注入步骤如下:
webview.getSetting().setJavaScriptEnable(true);
class JsObject {
@JavascriptInterface
public String toString() { return "injectedObject"; }
}
webView.addJavascriptInterface(new JsObject(), "injectedObject");
发现区别没?4.2之前向webview注入的对象所暴露的接口toString没有注释语句@JavascriptInterface,而4.2及以后的则多了注释语句@JavascriptInterface
经过查官方文档所知,因为这个接口允许JavaScript 控制宿主应用程序,这是个很强大的特性,但同时,在4.2的版本前存在重大安全隐患,因为JavaScript 可以使用反射访问注入webview的java对象的public fields,在一个包含不信任内容的WebView中使用这个方法,会允许攻击者去篡改宿主应用程序,使用宿主应用程序的权限执行java代码。因此4.2以后,任何为JS暴露的接口,都需要加
@JavascriptInterface,注释,这样,这个Java对象的fields 将不允许被JS访问。
HTML调用android的方法:
1.配置android支持js
WebSettings webSettings = webview.getSettings();
webSettings.setJavaScriptEnabled(true);//启用javascript支持
2.定义和暴露接口给js
webview.addJavascriptInterface(new PersonPlugin(), "Person");
private final class PersonPlugin {
@JavascriptInterface
public void getPersonList() {
......
}
}
3.js访问
Person.getPersonList();
Android访问HTML方法
1.在html定义方法
function show(){
document.write("This is a test message.");
}
2.在android中访问js方法:
webview.loadUrl("javascript:show('" + JSONStr + "')");
例子:
================================================
package com.example.html5Java;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.webkit.*;
import com.example.html5Java.app.Person;
import com.example.html5Java.app.PersonService;
import org.json.JSONArray;
import org.json.JSONObject;
import java.util.List;
public class MyActivity extends Activity {
private static final String LOG_TAG = "WebViewDemo";
private PersonService service;
private WebView webview;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
service = new PersonService();
webview = (WebView) this.findViewById(R.id.webView);//android内置浏览器对象
WebSettings webSettings = webview.getSettings();
webSettings.setJavaScriptEnabled(true);//启用javascript支持
webSettings.setSavePassword(false);
webSettings.setSaveFormData(false);
webSettings.setSupportZoom(false);
webview.setWebChromeClient(new MyWebChromeClient());
//添加一个js交互接口,方便html布局文件中的javascript代码能与后台java代码直接交互访问
webview.addJavascriptInterface(new PersonPlugin(), "Person");//new类名,交互访问时使用的别名
// <body onload="javascript:Person.getPersonList()">
//其实可以把这个html布局文件放在公网中,这样方便随时更新维护 例如 webview.loadUrl("www.xxxx.com/index.html");
webview.loadUrl("file:///android_asset/index.html");//加载本地的html布局文件
webview.setWebViewClient(new WebViewClient() {
//网页加载开始时调用,显示加载提示旋转进度条
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
// TODO Auto-generated method stub
super.onPageStarted(view, url, favicon);
}
//网页加载完成时调用,隐藏加载提示旋转进度条
@Override
public void onPageFinished(WebView view, String url) {
// TODO Auto-generated method stub
super.onPageFinished(view, url);
}
//网页加载失败时调用,隐藏加载提示旋转进度条
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
}
});
}
//定义一个内部类,从java后台(可能是从网络,文件或者sqllite数据库) 获取List集合数据,并转换成json字符串,调用前台js代码
private final class PersonPlugin {
@JavascriptInterface
public void getPersonList() {
List<Person> list = service.getPersonList();//获得List数据集合
//将List泛型集合的数据转换为JSON数据格式
try {
JSONArray arr = new JSONArray();
for (Person person : list) {
JSONObject json = new JSONObject();
json.put("id", person.getId());
json.put("name", person.getName());
json.put("mobile", person.getMobile());
arr.put(json);
}
String JSONStr = arr.toString();//转换成json字符串
webview.loadUrl("javascript:show('" + JSONStr + "')");//执行html布局文件中的javascript函数代码--
Log.i("MainActivity", JSONStr);
} catch (Exception e) {
// TODO: handle exception
}
}
@JavascriptInterface
//打电话的方法
public void call(String mobile) {
Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + mobile));
startActivity(intent);
}
}
final class MyWebChromeClient extends WebChromeClient {
@Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
Log.d(LOG_TAG, message);
result.confirm();
return true;
}
}
}
package com.dazhuo.domain;
public class Person {
private Integer id;
public Integer getId() {
return id;
}
public Person(Integer id, String name, String mobile) {
super();
this.id = id;
this.name = name;
this.mobile = mobile;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
private String name;
private String mobile;
}
package com.dazhuo.service;
import java.util.ArrayList;
import java.util.List;
import com.dazhuo.domain.Person;
public class PersonService {
public List<Person> getPersonList()
{
List<Person> list =new ArrayList<Person>();
list.add(new Person(32, "aa", "13675574545"));
list.add(new Person(32, "bb", "13698874545"));
list.add(new Person(32, "cc", "13644464545"));
list.add(new Person(32, "dd", "13908978877"));
list.add(new Person(32, "ee", "15908989898"));
return list;
}
}
<!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=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
function show(jsondata){
var jsonobjs = eval(jsondata);
var table = document.getElementById("personTable");
for(var y=0; y<jsonobjs.length; y++){
var tr = table.insertRow(table.rows.length); //添加一行
//添加三列
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].id;
td2.innerHTML = jsonobjs[y].name;
td3.innerHTML = "<a href='javascript:Person.call(\""+ jsonobjs[y].mobile+ "\")'>"+ jsonobjs[y].mobile+ "</a>";
}
}
function test(){
alert("======================>Alert测试");
document.write("执行测试");
}
</script>
</head>
<!-- js代码通过webView调用其插件中的java代码 -->
<body onload="Person.getPersonList();">
<table border="0" width="100%" id="personTable" cellspacing="0">
<tr>
<td width="20%">编号</td><td width="40%" align="center">姓名</td><td align="center">电话</td>
</tr>
</table>
<a href="javascript:window.location.reload();">刷新本页面</a>
<a href="javascript:test()">测试函数</a>
</body>
/</html>
转自:
http://blog.csdn.net/dinglang_2009/article/details/6862627