Android WebView的使用

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<?xml version="1.0"encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"android:layout_width="fill_parent"
   android:layout_height="fill_parent">
   <TextViewandroid: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 {

    privateEditText et = null;
    privateButton btn = null;
    privateWebView wv = null;
    privateWebSettings ws = null;
   @Override
    public voidonCreate(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(){
           publicboolean shouldOverrideUrlLoading(WebView view,String url){
             //当有新连接时，使用当前的 WebView
             view.loadUrl(url);
              returntrue;
           }
       });
       wv.setWebChromeClient(new WebChromeClient(){
           publicboolean onJsAlert(WebView view,String url,String message,finalJsResult result){
             //构建一个Builder来显示网页中的alert对话框
              Builderbuilder = new Builder(Test.this);
             builder.setTitle("提示对话框");
             builder.setMessage(message);
             builder.setPositiveButton(android.R.string.ok, newAlertDialog.OnClickListener(){

               @Override
                public voidonClick(DialogInterface dialog, int which) {
                   // TODOAuto-generated method stub
                  result.confirm();
                }

              });
             builder.setCancelable(false);
             builder.create();
             builder.show();
              returntrue;
           }
           publicboolean onJsConfirm(WebView view,String url,String message,finalJsResult result){
              Builderbuilder = new Builder(Test.this);
             builder.setTitle("带选择的对话框");
             builder.setMessage(message);
             builder.setPositiveButton(android.R.string.ok, newAlertDialog.OnClickListener(){

               @Override
                public voidonClick(DialogInterface dialog, int which) {
                   // TODOAuto-generated method stub
                  result.confirm();
                }

              });
             builder.setNeutralButton(android.R.string.cancel, newAlertDialog.OnClickListener(){

               @Override
                public voidonClick(DialogInterface dialog, int which) {
                   // TODOAuto-generated method stub
                  result.cancel();
                }

              });
             builder.setCancelable(false);
             builder.create();
             builder.show();
              returntrue;
           }
           publicboolean onJsPrompt(WebView view,String url,String message,StringdefaultValue,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);
              Builderbuilder = new Builder(Test.this);
             builder.setTitle("带输入的对话框 ");
             builder.setView(v);
             builder.setPositiveButton(android.R.string.ok, newAlertDialog.OnClickListener(){

               @Override
                public voidonClick(DialogInterface dialog, int which) {
                   // TODOAuto-generated method stub
                   String value=((EditText)v.findViewById(R.id.EditText_PROM)).getText().toString();
                  result.confirm(value);
                }

              });
             builder.setNegativeButton(android.R.string.cancel, newAlertDialog.OnClickListener(){

               @Override
                public voidonClick(DialogInterface dialog, int which) {
                   // TODOAuto-generated method stub
                  result.cancel();
                }

              });
             builder.setOnCancelListener(newDialogInterface.OnCancelListener(){

               @Override
                public voidonCancel(DialogInterface dialog) {
                   // TODOAuto-generated method stub
                  result.cancel();
                }

              });
             builder.create();
             builder.show();
              returntrue;
           }
          //设置网页加载的进度条
           public voidonProgressChanged(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 voidonReceivedTitle(WebView view,String title){
             Test.this.setTitle(title);
             super.onReceivedTitle(view, title);
           }
       });
       btn.setOnClickListener(new Button.OnClickListener(){

         @Override
          public voidonClick(View v) {
             // TODOAuto-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
    publicboolean onKeyDown(int keyCode, KeyEvent event) {
      if(keyCode==KeyEvent.KEYCODE_BACK&& wv.canGoBack()){
         wv.goBack();//返回前一个页面
          returntrue;
       }
       returnsuper.onKeyDown(keyCode, event);
    }

}

<?xml version="1.0"encoding="utf-8"?>
<LinearLayoutxmlns: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"?>
<manifestxmlns: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"/>
            <categoryandroid:name="android.intent.category.LAUNCHER"/>
         </intent-filter>
      </activity>

   </application>
   <uses-permissionandroid:name="android.permission.INTERNET" />

</manifest>

<%@ page language="java" contentType="text/html;charset=GBK" pageEncoding="GBK"%>

<html>
<head>
   <title>index.jsp</title>
<scripttype="text/JavaScript">
function s(){
alert("GoodMorning!");
}
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>

Android&nbsp;WebView的使用

Android WebView的使用