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copied!<p>Host a ping file to check for communication failure by means of string-reading call to it in a loop. Do this before launching the "Buy" function (or during the "buy" function", etc) to test communication prior to giving a chance to the grey screen to appear after confirmation.</p> <p>Alternative to reading it's contents, a timeout-default can be used. If bytes receives ≠ 0, proceed; if =0 after 8 seconds (or n-Seconds) display error.</p> <p>This will catch your "ugly grey screen" from showing, as if there's not sufficient network connectivity to complete the server-check (and thus, the transaction), you'll get an error instead of launching the store function itself.</p> <p>This is essentially a manual boolean to test for failure to communicate over the network - not just reading the presence or state of a network, as sometimes a network can be working fine, but communication over the network will be buggy or too slow to accommodate app usage/transactions/browsing/etc. This method would not need additional permissions to confirm network communication.</p> <hr> <p>Here's a rough example of the code to check if a webpage/location exists without downloading the file (saving bandwidth), bu still allowing opportunity to throw an exception or fulfill an "IF/THEN". (( Source: <a href="http://singztechmusings.wordpress.com/2011/05/26/java-how-to-check-if-a-web-page-exists-and-is-available/" rel="nofollow">http://singztechmusings.wordpress.com/2011/05/26/java-how-to-check-if-a-web-page-exists-and-is-available/</a> ))</p> <pre><code>import java.net.HttpURLConnection; import java.net.URL; public class URLUtils { public static void main(String[] args) { System.out.println(URLUtils.checkIfURLExists("http://www.google.com/")); } public static boolean checkIfURLExists(String targetUrl) { HttpURLConnection httpUrlConn; try { httpUrlConn = (HttpURLConnection) new URL(targetUrl) .openConnection(); httpUrlConn.setRequestMethod("HEAD"); // Set timeouts in milliseconds httpUrlConn.setConnectTimeout(30000); httpUrlConn.setReadTimeout(30000); // Print HTTP status code/message for your information. System.out.println("Response Code: " + httpUrlConn.getResponseCode()); System.out.println("Response Message: " + httpUrlConn.getResponseMessage()); return (httpUrlConn.getResponseCode() == HttpURLConnection.HTTP_OK); } catch (Exception e) { System.out.println("Error: " + e.getMessage()); return false; } } } </code></pre>

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