Android编程实现WebView添加进度条的方法

 android:layout_width="match_parent"

 android:layout_height="match_parent"

 android:orientation="vertical">

  android:id="@+id/pb"

  style="?android:attr/progressBarStyleHorizontal"

  android:layout_width="fill_parent"

  android:layout_height="8dip"

  android:indeterminateOnly="false"

  android:max="100"

  android:progressDrawable="@drawable/progress_bar_states">

  android:id="@+id/webview"

  android:layout_width="match_parent"

  android:layout_height="match_parent"/>

     android:startColor="#ff0000"

     android:centerColor="#ffa600"

     android:endColor="#ff5500"

   />

      android:startColor="#234"

      android:centerColor="#234"

      android:endColor="#a24"

    />

     android:startColor="#33000001"

     android:centerColor="#40000000"

     android:endColor="#44000000"

    />

ProgressBar pb;

@Override

protectedvoidonCreate(Bundle savedInstanceState) {

 super.onCreate(savedInstanceState);

 setContentView(R.layout.xxx);

 pb = (ProgressBar) findViewById(R.id.pb);

 pb.setMax(100);

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

 webView.getSettings().setJavaScriptEnabled(true);

 webView.getSettings().setSupportZoom(true);

 webView.getSettings().setBuiltInZoomControls(true);

 webView.setWebChromeClient(newWebViewClient() );

 webView.loadUrl("http://www.x.com");

}

privateclassWebViewClientextendsWebChromeClient {

 @Override

 publicvoidonProgressChanged(WebView view,intnewProgress) {

  pb.setProgress(newProgress);

  if(newProgress==100){

   pb.setVisibility(View.GONE);

  }

  super.onProgressChanged(view, newProgress);

 }

}