Android webView中调用JavaScript

原文地址：Android webView中调用JavaScript作者：yyylinux

package com.samll.games.pilishaizi;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.AlertDialog.Builder;

import android.content.DialogInterface;

import android.os.Bundle;

import android.os.Handler;

import android.view.KeyEvent;

import android.webkit.JsResult;

import android.webkit.WebChromeClient;

import android.webkit.WebSettings;

import android.webkit.WebView;

import android.webkit.WebViewClient;

public class PiLiShaiZiActivity extends Activity {

 WebView webView;

 Handler mHandler = new Handler();

 @Override

    public voidonCreate(Bundle savedInstanceState) {

   

       super.onCreate(savedInstanceState);

       setContentView(R.layout.main);

       //实例化webView

       webView = (WebView)findViewById(R.id.webView1);

       //设置Web属性，能够执行JavaScript脚本

       WebSettings webSettings  =webView.getSettings();

       webSettings.setJavaScriptEnabled(true);

       //设置可以访问文件 

  webSettings.setAllowFileAccess(true);

  webView.setWebChromeClient(newWebChromeClient() {

   //处理javascript中的confirm

   @Override

   publicboolean onJsConfirm(WebView view, String url,

     Stringmessage, final JsResult result) {

    Builderbuilder = new Builder(PiLiShaiZiActivity.this);

    ;

    builder.setMessage(message);

    builder.setPositiveButton("确定",

      newAlertDialog.OnClickListener() {

       publicvoid onClick(DialogInterface dialog,

         intwhich) {

        result.confirm();

       }

      });

    builder.setNegativeButton("取消",

      newDialogInterface.OnClickListener() {

       publicvoid onClick(DialogInterface dialog,

         intwhich) {

        result.cancel();

       }

      });

    builder.setCancelable(false);

    builder.create();

    builder.show();

    returntrue;

   }

  });

     //设置默认缩放方式尺寸是far

       webView.getSettings().setDefaultZoom(WebSettings.ZoomDensity.FAR);

       //支持缩放

       webSettings.setSupportZoom(true);

       // 缩放按钮

      // webSettings.setBuiltInZoomControls(true);

       //webView.setInitialScale(-1);//为25%，最小缩放等级

 

       //加载Url内容

       webView.loadUrl("file:///android_asset/pilishaizi/index.htm");

       //设置web视图客户端

       webView.setWebViewClient(new HelloWebViewClient());

       

 }

 

 //设置回退

 @Override

 public boolean onKeyDown(int keyCode, KeyEventevent) {

  if(keyCode==KeyEvent.KEYCODE_BACK){

   //弹出确定退出对话框

   newAlertDialog.Builder(this).setTitle("退出").setMessage("确定退出霹雳骰子游戏吗?")

   .setPositiveButton("确定",new OkListener(this))

   .setNegativeButton("取消",new CancelListener(this)).show();

   returntrue;

  }

  return super.onKeyDown(keyCode,event);

 }

 

 //Web视图客户端

 private class HelloWebViewClient extendsWebViewClient{

  @Override

  public booleanshouldOverrideUrlLoading(WebView view, String url) {

   // TODOAuto-generated method stub

   view.loadUrl(url);

   returntrue;

  }

 }

    protectedvoid onDestroy() { 

       super.onDestroy();           

       System.exit(0); 

       //或者下面这种方式 

       //android.os.Process.killProcess(android.os.Process.myPid());  

    }

 

 

}