Android ProgessBar while loading WebView

Question

In my application, I have a WebView which loads any URL from the internet. Now, sometimes due to slow networks the page takes a long time to load and the user s

Answer 1

I try dismis progress on method onPageFinished(), but not good too much, it has time delay to render webview.

try with onPageCommitVisible() better:

val progressBar = ProgressDialog(context)
    progressBar.setCancelable(false)
    progressBar.show()

    web_container.webViewClient = object : WebViewClient() {
        override fun shouldOverrideUrlLoading(view: WebView, url: String): Boolean {
            view.loadUrl(url)
            progressBar.show()
            return true
        }

        override fun onPageCommitVisible(view: WebView?, url: String?) {
            super.onPageCommitVisible(view, url)
            progressBar.dismiss()
        }
    }

Answer 2

  @SuppressLint("SetJavaScriptEnabled")
private void init() {
    webView = (WebView) findViewById(R.id.kamal);
    webView.setBackgroundColor(0);
    webView.getSettings().setJavaScriptEnabled(true);
    progressDialog = new ProgressDialog(WebView_Ofline.this);
    progressDialog.setMessage("Loading Please wait...");
    progressDialog.setCancelable(false);
    progressDialog.show();
    webView.setWebViewClient(new WebViewClient() {
        public void onPageFinished(WebView view, String url) {
            try {
                progressDialog.dismiss();
            } catch (Exception e) {
                e.printStackTrace();

            }
        }

    });
}

Answer 3

I want to show a progressBar while the webView gets loaded and hide the progessBar when the webView gets loaded completely.

Following snippet will help you.

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <WebView android:id="@+id/webview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1" />
</LinearLayout>

Main.class

public class Main extends Activity {
    private WebView webview;
    private static final String TAG = "Main";
    private ProgressDialog progressBar;

    /** Called when the activity is first created. */@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.main);

        this.webview = (WebView) findViewById(R.id.webview);

        WebSettings settings = webview.getSettings();
        settings.setJavaScriptEnabled(true);
        webview.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);

        final AlertDialog alertDialog = new AlertDialog.Builder(this).create();

        progressBar = ProgressDialog.show(Main.this, "Showing ProgressDialog", "Loading...");

        webview.setWebViewClient(new WebViewClient() {
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                Log.i(TAG, "Processing webview url click...");
                view.loadUrl(url);
                return true;
            }

            public void onPageFinished(WebView view, String url) {
                Log.i(TAG, "Finished loading URL: " + url);
                if (progressBar.isShowing()) {
                    progressBar.dismiss();
                }
            }

            public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
                Log.e(TAG, "Error: " + description);
                Toast.makeText(Main.this, "Oh no! " + description, Toast.LENGTH_SHORT).show();
                alertDialog.setTitle("Error");
                alertDialog.setMessage(description);
                alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        return;
                    }
                });
                alertDialog.show();
            }
        });
        webview.loadUrl("http://www.google.com");
    }
}

Answer 4

You can use something like that:

override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
    super.onPageStarted(view, url, favicon)
    binding.pbLoader.visibility = ProgressBar.VISIBLE
}

override fun onPageCommitVisible(view: WebView?, url: String?) {
    super.onPageCommitVisible(view, url)
    binding.pbLoader.visibility = ProgressBar.GONE
}

Answer 5

String url = "https://stackoverflow.com/questions/11241513/android-progessbar-while-loading-webview";
setProgressBarVisibility(View.VISIBLE);

webView.setWebViewClient(new WebViewClient() {
    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon) {
        super.onPageStarted(view, url, favicon);
        setProgressBarVisibility(View.VISIBLE);
    }

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

    @Override
    public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
        super.onReceivedError(view, request, error);
        setProgressBarVisibility(View.GONE);
    }
});

webView.loadUrl(url);

Also add method:

private void setProgressBarVisibility(int visibility) {
    // If a user returns back, a NPE may occur if WebView is still loading a page and then tries to hide a ProgressBar.
    if (progressBar != null) {
        progressBar.setVisibility(visibility);
    }
}

Answer 6

Paste This in your code and add your URL

   var progressDialog: ProgressDialog? = null

private fun startWebView(url: String) {

    val settings = webView.getSettings()

    settings.setJavaScriptEnabled(true)
    webView.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY)

    webView.getSettings().setBuiltInZoomControls(true)
    webView.getSettings().setUseWideViewPort(true)
    webView.getSettings().setLoadWithOverviewMode(true)

    progressDialog = ProgressDialog(this)
    progressDialog!!.setMessage("Loading...")
    progressDialog!!.show()

    webView.setWebViewClient(object : WebViewClient() {
        override fun shouldOverrideUrlLoading(view: WebView, url: String): Boolean {
            view.loadUrl(url)
            return true
        }

        override fun onPageFinished(view: WebView, url: String) {
            if (progressDialog!!.isShowing()) {
                progressDialog!!.dismiss()
            }
        }

        override fun onReceivedError(view: WebView, errorCode: Int, description: String, failingUrl: String) {
            Toast.makeText(this@MainActivity, "Error:$description", Toast.LENGTH_SHORT).show()

        }
    })
    webView.loadUrl(url)
}