android - onPageStart 被调用多次并且 onPageFinished 没有被单页调用

Question

我的问题不同于this一个人..我希望我的进度对话框在页面加载开始时启动，并在我的 web View 中页面加载完成时结束。我的问题是进度对话框启动并且永远不会被解雇。我设置了断点它表明进度对话框启动并多次被解雇然后它启动并且即使在页面加载完成后也不会被解雇。我的问题是为什么 onPageStarted 会为单个页面加载执行多次？为什么在页面加载完成后不调用 onPageFinished？

       myWebView.setWebViewClient(new WebViewClient(){
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            myWebView.loadUrl(url);
            return true;
        }

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            super.onPageStarted(myWebView, url, favicon);
            Log.d("mytag","Page Loading Started");
            //myURLProgressDialog= ProgressDialog.show(WebviewExampleActivity.this, "Page Loading", "Wait for a moment...");
        }
        @Override
        public void onPageFinished(WebView view, String url) {
            Log.d("mytag","Page Loading Finished!");
            super.onPageFinished(myWebView, url);
            //myURLProgressDialog.dismiss();
        }

    });

我的自标记过滤日志是这样的，用于加载单个页面:

   10-06 10:32:49.298: DEBUG/mytag(508): Page Loading Started
   10-06 10:32:49.998: DEBUG/mytag(508): Page Loading Started
   10-06 10:32:50.048: DEBUG/mytag(508): Page Loading Finished!
   10-06 10:32:50.048: DEBUG/mytag(508): Page Loading Started
   10-06 10:33:00.898: DEBUG/mytag(508): Page Loading Finished!

当我在已加载页面上单击链接时，它工作正常。这是日志:

10-06 10:59:25.098: DEBUG/mytag(543): Page Loading Started
10-06 10:59:30.889: DEBUG/mytag(543): Page Loading Finished!

Answer 1

使用.isShowing() 检查它是否已经打开。

final ProgressDialog mProgressDialog = new ProgressDialog(this);
mProgressDialog.setMessage("Loading...");

browser.setWebViewClient(new myViewClient(){

    @Override  
    public void onPageStarted(WebView view, String url, Bitmap favicon) {
        super.onPageStarted(view, url, favicon);

        if(!mProgressDialog.isShowing())
        {
            mProgressDialog.show();
        }

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

        if(mProgressDialog.isShowing()){
            mProgressDialog.dismiss();
        }                
    }              

});