Android Web View中的进度条

Question

我使用Xamarin.Native做了一个Android应用。它工作正常，但它有一个问题。当我点击任何链接时，它不会在屏幕上显示任何内容以显示它正在加载下一页。有什么想法吗？

  namespace name
    {
       [Activity(Label = "name", MainLauncher = true, Theme = "@android:style/Theme.NoTitleBar")]
        public class MainActivity : Activity
        {
            WebView web_view;
            int count = 1;

            protected override void OnCreate(Bundle bundle)
            {
                base.OnCreate(bundle);

                // Set our view from the "main" layout resource
                SetContentView(Resource.Layout.Main);

                web_view = FindViewById<WebView>(Resource.Id.webview);
                web_view.Settings.JavaScriptEnabled = true;
                web_view.LoadUrl("http://mimabebes.es");
                web_view.SetWebViewClient(new WebViewClient());
            }

            public override bool OnKeyDown(Android.Views.Keycode keyCode, Android.Views.KeyEvent e)
            {
                if (keyCode == Android.Views.Keycode.Back && web_view.CanGoBack())
                {
                    web_view.GoBack();
                    return true;
                }

                return base.OnKeyDown(keyCode, e);
            }
        }

    }

Answer 1

有两种覆盖方法：

• OnPageStarted

• OnPageFinished

您可以编写代码以在OnPageStarted中显示进度条，并隐藏OnPageFinished方法中的进度。

public override void OnPageStarted(WebView view, string url, Android.Graphics.Bitmap favicon)
{
    base.OnPageStarted(view, url, favicon);
    // Code to show the progress bar
}

public override void OnPageFinished(WebView view, string url)
{
    base.OnPageFinished(view, url);
    // Code to hide the progress bar
}