package com.weizhu.lan.view; import com.weizhu.lan.util.MyprogressDialog; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.Intent; import android.net.ConnectivityManager; import android.os.AsyncTask; import android.os.Bundle; import android.os.Handler; import android.view.KeyEvent; import android.view.Window; import android.webkit.WebChromeClient; import android.webkit.WebView; import android.widget.ProgressBar; public class HelpCenter extends Activity {     //50766649     private String urlHelp = "http://www.1sucai.cn",                     userid = "userid=";     private String yqhId;     private WebView web;     private Handler hand;     private ProgressBar pb;     private MyAsyncTask myAsy;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         requestWindowFeature(Window.FEATURE_NO_TITLE);         setContentView(R.layout.help_webview);         yqhId = getIntent().getStringExtra("yqhId");         web = (WebView) findViewById(R.id.help_WebView1);         web.getSettings().setBuiltInZoomControls(true); //可放大、缩小         myAsy = new MyAsyncTask();         final String str = urlHelp;             myAsy.execute(str);     }     class MyAsyncTask extends AsyncTask<String, String, Void>{         @Override         protected Void doInBackground(String... params) {             web.loadUrl(params[0]);             web.setWebChromeClient(new WebChromeClient(){                 @Override                 public void onProgressChanged(WebView view, int newProgress) {                     super.onProgressChanged(view, newProgress);                     pb.setProgress(newProgress); //它自己会处置进度条                 }             });             return null;         }         @Override         protected void onPostExecute(Void result) {         }         @Override         protected void onPreExecute() {             pb = (ProgressBar) findViewById(R.id.help_progressBar2);             pb.setProgress(0);         }     } }