java – 片段视图中webview的进度条

我想在eclipse中为android制作一个应用程序.我在其中使用webview的不同片段.但我想在加载webview时显示进度条,但我无法理解如何做到这一点我检查了许多教程但未能这样做.让我最活跃的代码在这里. import android.os.Bundle; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.MenuInflater; import android.view.View; import android.view.ViewGroup; import android.webkit.WebView; import android.webkit.WebViewClient; import android.app.Fragment; import android.annotation.SuppressLint; //import android.graphics.Bitmap; //import android.widget.ProgressBar; //import android.app.ProgressDialog; //import android.app.Activity; @SuppressLint("SetJavaScriptEnabled") public class AdminTab1 extends Fragment { private WebView webView; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { setHasOptionsMenu(true); View rootView = inflater.inflate(R.layout.admintab1, container, false); webView = (WebView) rootView.findViewById(R.id.webView1); webView.setWebViewClient(new WebViewClient()); webView.setScrollbarFadingEnabled(false); webView.setHorizontalScrollBarEnabled(false); webView.getSettings().setJavaScriptEnabled(true); webView.getSettings().setUserAgentString("AndroidWebView"); webView.clearCache(true); webView.loadUrl("http://ww.google.com"); return rootView; } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { super.onCreateOptionsMenu(menu, inflater); inflater.inflate(R.menu.mainmenu, menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.item1: webView.reload(); break; case R.id.item2: webView.goBack(); break; default: break; } return true; } }