android WebView结合javascript相互调用
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import java.util.ArrayList;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.util.Log;import android.webkit.WebView;public class FirstActivity extends Activity{private WebView web;//模拟号码簿private ArrayList<Contact> contacts = new ArrayList<Contact>(); /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); initContacts(); web = (WebView)this.findViewById(R.id.webView); web.getSettings().setJavaScriptEnabled(true);//开启javascript设置，否则WebView不执行js脚本 web.addJavascriptInterface(this,"phonebook"); //处理window.phonebook.xxx()的标志 web.loadUrl("file:///android_asset/phonebook.html"); } /** * 该方法将在js脚本中，通过window.phonebook.getContacts()进行调用 * 返回的ArrayList对象可以使得在js中访问Java集合 * @return */ public ArrayList<Contact> getContacts(){ return contacts; } /** * 初始化电话号码簿 */ public void initContacts(){ Contact instance = new Contact(); instance.name = "Benny"; instance.phone = "13700000"; contacts.add(instance); instance = new Contact(); instance.name = "Tommy"; instance.phone = "15800000"; contacts.add(instance); } /** * 通过window.phonebook.log来输出js调试信息。 * @param info */ public void log(String info){ Log.i("tag",info); } public void startActivity(){ Intent intent = new Intent(this,SecondActivity.class); startActivity(intent); } }assets/phonebook.html:
<html> <head> <title>js交互android</title> <script type="text/javascript">window.onload = function(){var persons = window.phonebook.getContacts();//调用FirstActivity.getContacts()if(persons){//persons是ArrayList对象window.phonebook.log("共有"+persons.size()+"个联系人");var contactsE = document.getElementById("contacts");var i = 0; while(i < persons.size()){//persons是ArrayList对象pnode = document.createElement("p");tnode = document.createTextNode("name: " + persons.get(i).getName() + " number: " + persons.get(i).getPhone());pnode.appendChild(tnode);contactsE.appendChild(pnode);i ++;}}else{window.phonebook.log("persons is null.");}};</script> </head> <body> <input type="button" onclick="window.phonebook.startActivity()" value="Goto next" /><div id = "contacts"><p> this is a JS_Android demo </p></div></body> </html> 还在用Android自带的WebView组件？太Out了！
http://www.open-open.com/lib/view/open1472481479625.html
