java - 进度对话框在 android studio 中不起作用

Question

我想在我的应用程序中显示进度对话框，直到它加载 URL 并显示它。但它没有显示进度对话框。请帮助我。

  setContentView(R.layout.activity_main);
    mywb = (WebView) findViewById(R.id.webView);

    ProgressDialog progressDialog = new ProgressDialog(this);
    progressDialog.setTitle("The Book Street");
    progressDialog.setMessage("Loading");
    progressDialog.setProgressStyle(progressDialog.STYLE_SPINNER);

    progressDialog.show();

    progressDialog.setCancelable(false);

    WebSettings webSettings = mywb.getSettings();
    webSettings.setJavaScriptEnabled(true);
    mywb.loadUrl("http://www.thebookstreet.com");

    progressDialog.dismiss();

    mywb.setWebViewClient(new WebViewClient());

Answer 1

像这样更改您的 webview 客户端:

mywb.setWebViewClient(new WebViewClient() {
            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                super.onPageStarted(view, url, favicon);
                progressDialog.show();
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
                progressDialog.dismiss();
           }

});