Novice question: PhoneGap and AJAX

I having difficulty getting even basic AJAX to work with PhoneGap developer and wanted to see if someone could help me.

I'm currently testing using the W3Schools PHP AJAX sample, so I can sort of "accumulation" my PhoneGap/AJAX capabilities to develop the functionality of user login for a mobile application that I've been responsible for creating. But, as someone who is not a programmer by any means (and that tends to confuse networking questions... don't even start on proxies!), I'm baffled to even try to get the W3Schools sample to work.

The sample, which can be found here (AJAX PHP), is as follows. (For those who, like me, also not by spirit program and who think better visually, the sample has a text box where if you type the first few letters of the name of a person, it will try to find names starting with those letters in the database file that it invites. It displays the real-time results of what it finds in the area of text that the user types).

HTML/JavaScript/AJAX:

< html>
< head >
< script >
function showHint (str) {}
If (str.length == 0) {}
document.getElementById("txtHint").innerHTML = "";
return;
} else {}
var XMLHTTP = new XMLHttpRequest();
XMLHTTP.onreadystatechange = function() {}
If (xmlhttp.readyState == 4 & & xmlhttp.status == 200) {}
document.getElementById("txtHint").innerHTML = xmlhttp.responseText;
}
};
XMLHTTP. Open ("GET", "gethint.php? q =" + str, true);
XMLHTTP. Send();
}
}
< / script >
< Sandwiched >
< body >

< p > < b > start typing a name into the field below:<b/b/b><p/p/p>
< form >
First name: <input type ='text' onkeyup ="showHint (this.value)">
< /Form >
< p > Suggestions: <span id ="txtHint"></ span><p/p/p>
< /Body >
</html >

PHP file:

<? PHP

Table with the names

$a [] = 'Anna ';

$a [] = "Britain";

$a [] = "Cinderella."

$a [] = "Diana."

$a [] = 'Eva ';

$a [] = 'Fiona ';

$a [] = "Gunda";

$a [] = "Hege";

$a [] = 'inga ';

$a [] = 'Johanna ';

$a [] = "Kitty";

$a [] = "Linda."

$a [] = 'Nina ';

$a [] = "Ophelia."

$a [] = "Petunia".

$a [] = 'Amanda ';

$a [] = 'Raquel ';

$a [] = "Cindy."

$a [] = 'Doris ';

$a [] = "Eve."

$a [] = "Evita";

$a [] = "Sunniva.

$a [] = "Tove";

$a [] = "Unni"

$a [] = "Purple";

$a [] = "Liza."

$a [] = 'Elizabeth ';

$a [] = "Ellen."

$a [] = 'Michael ';

$a [] = 'Vicky ';

get the q of URL parameter

$q = $_REQUEST ['q'];

$hint = "";

Search all advice table if $q is different from «»

if ($q !== "") {

$q = strtolower ($q);

$len = strlen ($q);

{foreach ($a as $name)

If (stristr ($q, substr ($name, 0, $len))) {}

If ($hint = "") {}

$hint = $name;

} else {}

$hint. = ", $name";

}

}

}

}

Never out "no suggestion" If no reference has been found or out of correct values

echo $hint = ""? "no suggestion": $hint; "

? >

Test the HTML file in my browser, everything works perfectly.

However, do the above in a project PhoneGap and test it on my Android phone, the possibility of dismissal of name does not work. And of course thanks to the AJAX control is not running.

Anyone know how I can fix this problem? I've already put the following in my config.xml file and nothing changed:

< access origin = "" * "subdomains ="true"/ >"

Thanks in advance.

You pouvez host PHP files locally on your dev machine, although I suggest the implementation of a virtual test machine so that you don't have to muck about with the main configuration of your dev machine.  In addition, if your virtual machine is a linux VM, which will give practice you when you put something in place elsewhere, because chances are good that you it would be deployed to a linux machine in the cloud. There are many devices out there who have a LAMP stack put in place of the out-of-the-box (LLinux Apache, MySQL, PHP) - for example, https://www.turnkeylinux.org/lampstack.

As long as your mobile device is on the same network as your development computer (/VM), you can connect with a local IP address (like 192.168. *). You must also be able to connect using your local hostname (such as your - macbook.local) or something similar. It depends on how you configure when you create a virtual machine, but virtual machines live generally on your network with a different IP address on your dev machine. (This behavior, however, is usually the default.)

You can also use environments such as Cloud9 and similar services to test the code like this. They are not suitable for production code, but you can run a PHP script (or node, etc.) and essentially have an external server underpowered with little or no effort on your part.

Side note: personally, to avoid 'localhost' even during the test, because 'localhost' can mean several things depending on what you are testing for:

  • essay on a physical device: made localhost refers to the device
  • testing on an emulator: done localhost refers to the emulator
  • tests on iOS Simulator: done localhost refers to the machine of dev
  • test in a browser on your dev machine: locahost refers to the machine of dev

If you use host names/IP addresses, there is no ambiguity, so why I suggest to use it.

Finally, don't forget to check that your firewall accepts external requests on port, that you intend to use.

Tags: PhoneGap

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