Question

我获得了在webview中显示活动指标的代码。我检查了多个参考文件，但仍然无法使其正常工作。你能帮我调试下面的代码吗？

活动指示符未附带以下代码

protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
    final BaseActivity MyActivity = ReviewWebActivity.this;
    setContentView(R.layout.review_web);
    getWindow().setFeatureInt(Window.FEATURE_PROGRESS,
            Window.PROGRESS_VISIBILITY_ON);


    ScannedProduct product =  getReviewUrl();
    reviewUrl = product.getReviewLink();

    if (reviewUrl == null) {
        String err = product.getErrorCode();
        if(err.equals("")) err ="No Data Available for this product";
        Toast.makeText(getApplicationContext(),
                "No Data Available for this product", 1).show();
        return;
    }

    webReview = (WebView) findViewById(R.id.webReview);
    webReview.setWebChromeClient(new WebChromeClient() {
        public void onProgressChanged(WebView view, int progress) {
            // Make the bar disappear after URL is loaded, and changes
            // string to Loading...
            MyActivity.setTitle("Loading...");
            MyActivity.setProgress(progress * 1000); // tried with 100 also


        }
    });
    webReview.setWebViewClient(new ReviewWebClient());
    webReview.getSettings().setJavaScriptEnabled(true);

    webReview.loadUrl(reviewUrl);
}

Answer 1

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class SandbarinFacebook extends Activity {
    WebView mWebView;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        final ProgressDialog pd = ProgressDialog.show(this, "", "Loading...",true);

        mWebView = (WebView) findViewById(R.id.webkitWebView1);
        mWebView.getSettings().setJavaScriptEnabled(true);
        mWebView.getSettings().setSupportZoom(true);  
        mWebView.getSettings().setBuiltInZoomControls(true);
        mWebView.setWebViewClient(new WebViewClient() {
            @Override
            public void onPageFinished(WebView view, String url) {
                if(pd!=null && pd.isShowing())
                {
                    pd.dismiss();
                }
            }
        });
        mWebView.loadUrl("http://www.yahoo.co.in");
        setTitle("Yahoo!");
    }
}

Answer 2

在活动的onCreate方法中写下以下代码。

webView.setWebChromeClient(new ChromeClient());
progress=ProgressDialog.show(this, "", "Loading...");
webView.loadUrl(url);

在同一活动中创建ChromeClient课程。

 private class ChromeClient extends WebChromeClient {
    @Override
    public void onProgressChanged(WebView view, int newProgress) {
        if(newProgress >= 85) {
            progress.dismiss();
        }
        super.onProgressChanged(view, newProgress);
    }
}

相应地声明对象。回到我身边如果你仍然面临错误。我将提供完整的源代码。

Answer 3

我无法发表评论，因为我没有足够的声望点，只是对接受的答案进行快速评论：在检查对话框是否显示之前检查null。这将避免可怕的NPE。

if(pd != null && pd.isShowing()) { ... }

Answer 4

Kotlin片段：

myProgressBar.show()

myWebView.webViewClient = object : WebViewClient() {
    override fun onPageFinished(view: WebView, url: String) {
        myProgressBar.hide()
    }
}

将此扩展功能添加到扩展文件中：

fun View.show() {
    visibility = View.VISIBLE
}

fun View.hide() {
    visibility = View.GONE
}

android webview客户活动指标

4 个答案: