//示例地图类package com.can2do.doimobile.news;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.TextView;import com.can2do.doimobile.R;import com.can2do.doimobile.base.BaseUiWeb;import com.can2do.doimobile.base.C;public class UiNewsOne extends BaseUiWeb {        private String tag = null;    private WebView mWebViewMap;        @Override    public void onStart() {        super.onStart();                setContentView(R.layout.ui_news_one);                Bundle params = this.getIntent().getExtras();        tag = params.getString("tag");                TextView titleText = (TextView) this                .findViewById(R.id.main_top_title1);        titleText.setText(tag);                        mWebViewMap = (WebView) findViewById(R.id.web_news_one);        mWebViewMap.getSettings().setJavaScriptEnabled(true);        mWebViewMap.setWebViewClient(new WebViewClient(){        });        mWebViewMap.setWebViewClient(new WebViewClient() {             public void onReceivedError(WebView view, int errorCode, String description, String failingUrl)             {                 view.stopLoading();                 view.clearView();                 Message msg=handler.obtainMessage();//发送通知，加入线程                 msg.what=1;//通知加载自定义404页面                 handler.sendMessage(msg);//通知发送！             }             public boolean shouldOverrideUrlLoading(WebView view, String url)               {                 view.loadUrl(url);                 return true;             }        });        mWebViewMap.loadUrl(C.news.news1);                this.setWebView(mWebViewMap);        this.startWebView();    }         protected Handler handler = new Handler(){         public void handleMessage(Message message){             switch (message.what) {             case 1:                 mWebViewMap.loadUrl("file:///android_asset/www/404/404.html");                 break;             }         }     };         }