Question

如何在android中为Web浏览器创建加载对话框？应用程序应加载URL并显示加载对话框。当web浏览器加载url时，关闭加载对话框。

Answer 1

首先创建WebView并使其扩展自定义WebViewClient

web = (WebView) findViewById(R.id.webview01);
progressBar = (ProgressBar) findViewById(R.id.progressBar1);

web.setWebViewClient(new myWebClient());
web.getSettings().setJavaScriptEnabled(true);
web.loadUrl("http://www.example.com");

您的自定义WebViewClient会在页面开始加载和页面加载完成时通知您。只需在页面加载时显示ProgressBar，并在完成加载时隐藏。

public class myWebClient extends WebViewClient
{
    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon) {
        // TODO Auto-generated method stub
        super.onPageStarted(view, url, favicon);
    }

    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        // TODO Auto-generated method stub
            progressBar.setVisibility(View.VISIBLE);
        view.loadUrl(url);
        return true;

    }

    @Override
    public void onPageFinished(WebView view, String url) {
        // TODO Auto-generated method stub
        super.onPageFinished(view, url);

        progressBar.setVisibility(View.GONE);
    }
}

如何在android中加载web浏览器

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