为了先体验一下效果，截了一个图
main.xml
<?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(){
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
result.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(){
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
result.confirm();
}
});
builder.setNeutralButton(android.R.string.cancel, new AlertDialog.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
result.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(){
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
String value = ((EditText)v.findViewById(R.id.EditText_PROM)).getText().toString();
result.confirm(value);
}
});
builder.setNegativeButton(android.R.string.cancel, new AlertDialog.OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
result.cancel();
}
});
builder.setOnCancelListener(new DialogInterface.OnCancelListener(){
@Override
public void onCancel(DialogInterface dialog) {
// TODO Auto-generated method stub
result.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(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String 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");
}
}
});
}
@Override
public 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);
}
}
prom_dialog.xml
<?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>
注意不要忘记加上网络权限啊！
<%@ 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>