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POAndroid WebView is blank after network disconnect
 

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  1. POAndroid WebView is blank after network disconnect
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    <p>I have a following scenario for webview </p> <pre><code> @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_web_view_tutorial); mWebView = (WebView) findViewById(R.id.webView1); mWebView.setWebViewClient(mWebViewClient); mWebView.setInitialScale(0); mWebView.setVerticalScrollBarEnabled(false); mWebView.requestFocusFromTouch(); WebSettings settings = mWebView.getSettings(); settings.setJavaScriptEnabled(true); Button btnGo = (Button) findViewById(R.id.button1); btnGo.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { String url = "http://www.google.com";// here goes my server url with https://...... for authentication showProgressDialog("Loading"); mWebView.loadUrl(url); } }); } private void showProgressDialog(String title) { if(mProgress == null || !mProgress.isShowing()){ mProgress = ProgressDialog.show(this, title, "Please wait...", true, true, new OnCancelListener() { public void onCancel(DialogInterface pd) { finishActivity(); } }); mProgress.setCanceledOnTouchOutside(false); mProgress.setCancelable(true); } } private void finishActivity() { if(mWebView!=null){ finish(); } } private final WebViewClient mWebViewClient = new WebViewClient() { public void onPageStarted(WebView view, String url, android.graphics.Bitmap favicon) { super.onPageStarted(view, url, favicon); Log.d("test", "page started"); } @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { Log.d("test", "page should override called"); return super.shouldOverrideUrlLoading(view, url); } @Override public void onPageFinished(WebView view, String url) { if (mIsLoadingSigninPage) { mIsLoadingSigninPage = false; dismissProgressDialog(); } Log.d("test", "page finished"); super.onPageFinished(view, url); } @Override public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) { mIsLoadingSigninPage = false; dismissProgressDialog(); Log.d("test", "page error received"); super.onReceivedError(view, errorCode, description, failingUrl); finishActivity(); } }; private void dismissProgressDialog() { if (mProgress != null &amp;&amp; mProgress.isShowing()) { mProgress.dismiss(); mProgress =null; } } </code></pre> <p>// this is log cat for point 3 below</p> <pre><code> 03-07 07:31:20.977: D/test(1431): page started 03-07 07:31:22.788: D/test(1431): page should override called 03-07 07:31:22.887: D/test(1431): page started 03-07 07:31:24.496: D/test(1431): page finished </code></pre> <p>Ok,</p> <ol> <li>When network is not available I ran this code, webviewclient's onReceivedError get called,</li> <li>If network available and page loading started, and network disconnect, then also onReceivedError get called.</li> <li>But there is a some instance of time,(count 1,2,3 after pressing button and disconnect network with f8 on emulator) mWebView.loadUrl(url) gets called, webViewclient's methods gets called like below </li> </ol> <p>and WebView displays blank white screen, onReceivedError not called. here is logcat</p> <p>and </p> <ol> <li>What is wrong with this code.</li> <li>Why onReceivedError not called. If it does not get called, how to handle this situation</li> <li>How to know webView has not loaded anyting and finish activity</li> </ol>
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