Android WebView的使用

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="fill_parent"android:layout_height="fill_parent"><TextView android:layout_width="fill_parent"android:layout_height="wrap_content" android:text="@string/hello" /><EditText android:hint="请输入URL" android:id="@+id/EditText01"android:layout_width="fill_parent" android:layout_height="wrap_content"></EditText><Button android:text="OK" android:id="@+id/Button01"android:layout_width="fill_parent" android:layout_height="wrap_content"></Button><WebView android:id="@+id/WebView" android:layout_width="fill_parent"android:layout_height="wrap_content"></WebView></LinearLayout>

package com.Aina.Android;import android.app.Activity;import android.app.AlertDialog;import android.app.AlertDialog.Builder;import android.content.DialogInterface;import android.os.Bundle;import android.view.KeyEvent;import android.view.LayoutInflater;import android.view.View;import android.view.Window;import android.webkit.JsPromptResult;import android.webkit.JsResult;import android.webkit.URLUtil;import android.webkit.WebChromeClient;import android.webkit.WebSettings;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;public class Test extends Activity {    /** Called when the activity is first created. */private EditText et = null;private Button btn = null;private WebView wv = null;private WebSettings ws = null;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        et = (EditText) this.findViewById(R.id.EditText01);        btn = (Button) this.findViewById(R.id.Button01);        wv = (WebView) this.findViewById(R.id.WebView);        ws = wv.getSettings();        ws.setAllowFileAccess(true);//设置允许访问文件数据        ws.setJavaScriptEnabled(true);//设置支持javascript脚本        ws.setBuiltInZoomControls(true);//设置支持缩放        wv.setWebViewClient(new WebViewClient(){        public boolean shouldOverrideUrlLoading(WebView view,String url){        //当有新连接时，使用当前的 WebView        view.loadUrl(url);        return true;        }        });        wv.setWebChromeClient(new WebChromeClient(){        public boolean onJsAlert(WebView view,String url,String message,final JsResult result){        //构建一个Builder来显示网页中的alert对话框        Builder builder = new Builder(Test.this);        builder.setTitle("提示对话框");        builder.setMessage(message);        builder.setPositiveButton(android.R.string.ok, new AlertDialog.OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubresult.confirm();}                });        builder.setCancelable(false);        builder.create();        builder.show();        return true;        }        public boolean onJsConfirm(WebView view,String url,String message,final JsResult result){        Builder builder = new Builder(Test.this);        builder.setTitle("带选择的对话框");        builder.setMessage(message);        builder.setPositiveButton(android.R.string.ok, new AlertDialog.OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubresult.confirm();}                });        builder.setNeutralButton(android.R.string.cancel, new AlertDialog.OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubresult.cancel();}        });        builder.setCancelable(false);        builder.create();        builder.show();        return true;        }        public boolean onJsPrompt(WebView view,String url,String message,String defaultValue,final JsPromptResult result){        LayoutInflater inflater = LayoutInflater.from(Test.this);        final View v = inflater.inflate(R.layout.prom_dialog, null);        //设置 TextView对应网页中的提示信息        ((TextView)v.findViewById(R.id.TextView_PROM)).setText(message);        //设置EditText对应网页中的输入框        ((EditText)v.findViewById(R.id.EditText_PROM)).setText(defaultValue);        Builder builder = new Builder(Test.this);        builder.setTitle("带输入的对话框 ");        builder.setView(v);        builder.setPositiveButton(android.R.string.ok, new AlertDialog.OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubString value = ((EditText)v.findViewById(R.id.EditText_PROM)).getText().toString();result.confirm(value);}                });        builder.setNegativeButton(android.R.string.cancel, new AlertDialog.OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubresult.cancel();}                });        builder.setOnCancelListener(new DialogInterface.OnCancelListener(){@Overridepublic void onCancel(DialogInterface dialog) {// TODO Auto-generated method stubresult.cancel();}                });        builder.create();        builder.show();        return true;        }        //设置网页加载的进度条        public void onProgressChanged(WebView view,int newProgress){        Test.this.getWindow().setFeatureInt(Window.FEATURE_PROGRESS, newProgress*100);        super.onProgressChanged(view, newProgress);        }        //设置应用程序的标题        public void onReceivedTitle(WebView view,String title){        Test.this.setTitle(title);        super.onReceivedTitle(view, title);        }        });        btn.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stubString url = et.getText().toString();//判断输入的内容是不是网址if(URLUtil.isNetworkUrl(url)){wv.loadUrl(url);}else{et.setHint("输入的网址不合法，请重新输入");//et.setText("输入的网址不合法，请重新输入");}}                });    }@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {if(keyCode==KeyEvent.KEYCODE_BACK && wv.canGoBack()){wv.goBack();//返回前一个页面return true;}return super.onKeyDown(keyCode, event);}    }

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:gravity="center_horizontal"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    >    <TextView android:id="@+id/TextView_PROM"    android:layout_width="fill_parent"android:layout_height="wrap_content"/>    <EditText android:id="@+id/EditText_PROM"android:layout_width="fill_parent"android:layout_height="wrap_content"android:selectAllOnFocus="true"android:scrollHorizontally="true"/></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.Aina.Android" android:versionCode="1" android:versionName="1.0"><application android:icon="@drawable/icon" android:label="@string/app_name"><activity android:name=".Test" android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application><uses-permission android:name="android.permission.INTERNET" /></manifest>

<%@ page language="java" contentType="text/html; charset=GBK" pageEncoding="GBK"%><html>  <head>    <title>index.jsp</title><script type="text/JavaScript">   function s(){alert("Good Morning!");    }function d(){confirm("Are you ok?")}function f(){prompt("What’s your name?")}</script>   </head>    <body>  下面我们演示三种对话框  <br/><br/>  <input type="button" value="警告，提醒对话框" onclick="s()">  <br/><br/>  <input type="button" value="带选择的对话框" onclick="d()">  <br/><br/>  <input type="button" value="要求用户输入的对话框" onclick="f()">  </body></html>

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