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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta content="App Inventor for Android" name="description" />
<meta content="Android, Blocks App Inventor, Mobile, Phone, IDE" name="keywords" />
<title>
Reference - App Inventor for Android
</title>
<link href="/static/images/appinventor-16.png" rel="SHORTCUT ICON" type="image/ico" />
<link href="/static/images/appinventor-16.png" rel="icon" type="image/png" />
<link href="/static/css/appinventor.css" rel="stylesheet" />
<script src="http://www.google.com/js/gweb/analytics/autotrack.js">
</script>
<script>
var tracker = new gweb.analytics.AutoTrack({
profile: 'UA-5856106-2'
});
</script>
<script language = "JavaScript" src="/static/scripts/HeaderAndFooter.js"></script>
<style>
img.c2 {border-width:0}
div.c1 {clear:both;}
</style>
</head>
<body>
<script language = "JavaScript">createHeader('<div id="navigation-breadcrumb"> <a href="/learn/">Learn</a> > Reference > ');</script><br>
<div id="aiac">
<div class="main-container">
<div class="customhr customhr-gray">
</div>
<div class="content">
<div class="content-body">
<div class="learn-page">
<h1>
Reference Documentation
</h1>
<h2>
Components
</h2>
<p>
These pages describe the components you can use in App Inventor to build your apps.
</p>
<p>
Each component can have methods, events, and properties. Most properties can be
changed by apps — these properties have blocks you can use to get and set the
values. Some properties can't be changed by apps — these only have blocks you can
use to get the values, not set them. In this document, read-only properties are
shown in
<i>
italics
</i>
. A few properties are only available in the Designer.
</p>
<ul>
<li>
<a href="components/basic.html">
Basic components
</a>
</li>
<li>
<a href="components/media.html">
Media components
</a>
</li>
<li>
<a href="components/animation.html">
Animation components
</a>
</li>
<li>
<a href="components/social.html">
Social components
</a>
</li>
<li>
<a href="components/sensors.html">
Sensor components
</a>
</li>
<li>
<a href="components/screenarrangement.html">
Screen Arrangement components
</a>
</li>
<li>
<a href="components/legomindstorms.html">
LEGO® MINDSTORMS® components
</a>
</li>
<li>
<a href="components/other.html">
Other components
</a>
</li>
<li>
<a href="components/notready.html">
Not ready for prime time components
</a>
</li>
</ul>
<p>
LEGO and MINDSTORMS are registered trademarks of the LEGO Group.
</p>
<h2>
Blocks
</h2>
<p>
These pages describe the blocks you can use when you build your App Inventor apps.
</p>
<ul>
<li>
<a href="blocks/definition.html">
Definition blocks
</a>
</li>
<li>
<a href="blocks/text.html">
Text blocks
</a>
</li>
<li>
<a href="blocks/list.html">
List blocks
</a>
</li>
<li>
<a href="blocks/math.html">
Math blocks
</a>
</li>
<li>
<a href="blocks/logic.html">
Logic blocks
</a>
</li>
<li>
<a href="blocks/control.html">
Control blocks
</a>
</li>
<li>
<a href="blocks/colors.html">
Color blocks
</a>
</li>
</ul>
<h2>
Concepts
</h2>
<ul>
<li>
<a href="other/activitystarter.html">
Using the Activity Starter
</a>
</li>
<li>
<a href="other/appstoplay.html">
Uploading Your Apps to Google Play
</a>
</li>
<li>
<a href="other/tinywebdb.html">
Creating a Custom TinyWebDB Service
</a>
</li>
<li>
<a href="other/testing.html">
Live Development, Testing, and Debugging
</a>
</li>
<li>
<a href="other/displaylist.html">
Displaying a List
</a>
</li>
<li>
<a href="other/locationsensor.html">
Using the Location Sensor
</a>
</li>
<li>
<a href="other/sizes.html">
Specifying Sizes of Components
</a>
</li>
<li>
<a href="other/sizes.html">
</a>
<a href="other/sizes.html">
</a>
<a href="other/media.html">
Accessing Images and Sounds
</a>
</li>
<li>
<a href="other/bluetooth.html">
Bluetooth
</a>
-
<i>
Coming Soon!
</i>
</li>
</ul>
</div>
</div>
</div>
<div class="footer">
<script language = "JavaScript">createFooter();</script><br>
<div class="footer-lastupdate">
<script>
if (document.lastModified != '') {
var m = "Page last updated: " + document.lastModified;
var p = m.length-8;
document.writeln("<center>");
document.write(m.substring(p, 0));
document.writeln("<\/center>");
}
</script>
</div>
</div>
</div>
</div>
</body>
</html>