1. 在onCreate方法中调用AsyncTask。
2. 在AsyncTask中,只需创建进度对话框并显示它。
3. 在WebView客户端中,只需在单击WebView中打开的任何网站链接时再次显示进度对话框。加载完成后,我们重写onPageFinished方法,并在其中解除进度对话框。
onCreate
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.web_view);
web_view = (WebView) findViewById(R.id.web_view);
OpenWebSiteInWebView opensite = new OpenWebSiteInWebView();
opensite.execute();
}
AsyncTask
private class OpenWebSiteInWebView extends AsyncTask<String, Void, String> {
@SuppressWarnings("deprecation")
@SuppressLint("SetJavaScriptEnabled")
@Override
protected String doInBackground(String... params) {
web_view.setWebViewClient(new MyWebViewClient());
web_view.loadUrl("ur site name");
return null;
}
@Override
protected void onPostExecute(String result) {
}
@Override
protected void onPreExecute() {
pd = new ProgressDialog(SiteOpenInWebView.this);
pd.setMessage("Please wait Loading...");
pd.show();
}
}
WebViewClient
private class MyWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
if (!pd.isShowing()) {
pd.show();
}
return true;
}
@Override
public void onPageFinished(WebView view, String url) {
System.out.println("on finish");
if (pd.isShowing()) {
pd.dismiss();
}
}
}