android webview 简单浏览器实现代码

package com.HHBrowser.android;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
public class main extends Activity {
    /** Called when the activity is first created. */
 WebView wv;
    Handler handler;
    Button btnButton;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        wv = (WebView)findViewById(R.id.webView1);
  wv.getSettings().setJavaScriptEnabled(true);
  wv.setScrollBarStyle(0);
  wv.loadUrl("http://www.baidu.com");
  btnButton = (Button)findViewById(R.id.turn);
  btnButton.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    EditText editText = (EditText)findViewById(R.id.editText1);
    String strurl = String.valueOf(editText.getText());
    if(strurl.contains("http://"))
    {
     Log.v("ttt", strurl);
     loadurl(wv,strurl);
    }else {
     Log.v("ttt", strurl);
     loadurl(wv,"http://www.baidu.com");
    }   
   }
  });
  wv.setWebViewClient(new WebViewClient()
  {
   public boolean shouldOverrideUrlLoading(final WebView view, final String url) {
     EditText newText = (EditText)findViewById(R.id.editText1);
     newText.setText(url);
              loadurl(view,url);
              return true;  
   }
  });
    }
    public void loadurl(final WebView view,final String url){
  new Thread(){
   public void run(){
     view.loadUrl(url);
   }
  }.start();
 }
}

<http://schemas.android.com/apk/res/Android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
<android:layout_height="wrap_content"
android:baselineAligned="false">
     <android:text=""
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:id="@+id/editText1"
     android:maxEms="15"
     android:minEms="10"
     android:layout_gravity="center_vertical"
     >

   <android:layout_height="wrap_content"
        android:baselineAligned="false">
     <android:layout_width="fill_parent" 
    android:layout_height="wrap_content">