webview打开网页

package com.example.webview1;

import android.os.Bundle; import android.app.Activity; import android.view.KeyEvent; import android.view.Menu; import android.webkit.WebChromeClient; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.Toast;

public class MainActivity extends Activity {  private WebView web;  @Override  protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.activity_main);   init();  }

 private void init() {   // TODO Auto-generated method stub   web=(WebView) findViewById(R.id.webView1);   WebSettings webset = web.getSettings();//打开javascript   webset.setJavaScriptEnabled(true);   web.setWebViewClient(new WebViewClient()//不使用默认浏览器   {    public boolean shouldOverrideUrlLoading(WebView view,String url)    {     view.loadUrl(url);     return true;    }   });   web.setWebChromeClient(new WebChromeClient()   {

   /* (non-Javadoc)     * @see android.webkit.WebChromeClient#onProgressChanged(android.webkit.WebView, int)     */    @Override    public void onProgressChanged(WebView view, int newProgress) {     // TODO Auto-generated method stub 网页加载进度     if(newProgress==100)     {      closeDialog();     }     else     {      openDialog(newProgress);     }     super.onProgressChanged(view, newProgress);    }       });   web.loadUrl("http://www.baidu.com");     }

 protected void closeDialog() {   // TODO Auto-generated method stub     }

 protected void openDialog(int newProgress) {   // TODO Auto-generated method stub   Toast.makeText(MainActivity.this, String.valueOf(newProgress), Toast.LENGTH_SHORT).show();  }

 @Override  public boolean onCreateOptionsMenu(Menu menu) {   // Inflate the menu; this adds items to the action bar if it is present.   getMenuInflater().inflate(R.menu.main, menu);   return true;  }

 /* (non-Javadoc)   * @see android.app.Activity#onKeyDown(int, android.view.KeyEvent)   */  @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {//返回网页，   // TODO Auto-generated method stub   if(keyCode==KeyEvent.KEYCODE_BACK)   {    if(web.canGoBack())    {     web.goBack();     return true;    }    else    {     System.exit(0);    }   }   return super.onKeyDown(keyCode, event);  }

}