加载WebView后无法使ProgressDialog停止

Question

我可以显示ProgressDialog,但是在加载WebView之后我无法停止它.我只需要一个简单的刷新按钮.

到目前为止,这是工作代码:

      public class Quotes extends Activity implements OnClickListener{

      WebView webview;

      @Override
      public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);

      webview = (WebView) findViewById(R.id.scroll);
      webview.getSettings().setJavaScriptEnabled(true);
      webview.loadUrl("http://www.dgdevelco.com/quotes/quotesandroid.html");

      View refreshClick = findViewById(R.id.refresh);
      refreshClick.setOnClickListener(this);

      }


      public void onClick(View v){
           switch(v.getId()){

           case R.id.refresh:
                ProgressDialog.show(Quotes.this, "", "Loading...", true);
                webview.reload();

                }
           }
      }

我只是想不出来.我到处都看,但似乎没什么用.

Answer 1

这是快速回答,你应该真正为WebViewClient实现自己的类,你应该在该类中显示对话框,但你会想出来的.

首先,使您的对话全局化(在您的真实应用程序中,您可能希望将其传递给您的客户端,或在webviewclient中声明它,然后在onPageStarted上覆盖).

  ProgressDialog dialog;     

那简单地说:

 webview.setWebViewClient(new WebViewClient() {
        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
            dialog.dismiss();
        }
    });



   public void onClick(View v){
       switch(v.getId()){

       case R.id.refresh:
            dialog = ProgressDialog.show(Quotes.this, "", "Loading...", true);
            webview.reload();

            }
       }
  }

这是您需要的API:WebViewClient

编辑

好吧,这让我烦恼,这是正确的方法:

 public class Quotes extends Activity implements OnClickListener{

  private WebView webview;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    webview = (WebView) findViewById(R.id.scroll);
    webview.getSettings().setJavaScriptEnabled(true);
    webview.setWebViewClient(new MyWebViewClient(this));
    webview.loadUrl("http://www.dgdevelco.com/quotes/quotesandroid.html");

    findViewById(R.id.refresh).setOnClickListener(this);
  }


  public void onClick(View v){
       switch(v.getId()){
       case R.id.refresh:
            webview.reload();
             break;
            }
       }
  }

新课程:

 public class MyWebViewClient extends WebViewClient {
    private Context mContext;
    private ProgressDialog mDialog;

  public MyWebViewClient(Context context){
    mContext = context;
  }

  @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            super.onPageStarted(view, url, favicon);
            mDialog = ProgressDialog.show(mContext, "", "Loading...", true);
        }

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

 }