Dynamically loading class in Java Android

Question

Looking for the best way that I can define a class without knowing its name at the time of compilation. In PHP, this is done as follows:

$className = 'testclass';
$myClass = new $className();

In contrast, already in Java so do not be. I know it's ClassLoader, but I'm not sure if Android does so the same thing. I would ask for a specific code or even tips on how I can do it.

Regards.

@MarioStoilov I thought of a simple plugin system, which would be just loaded when the application starts. However, the plugin can dynamically add, so I do not know their names. — Jake
– Jake, Commented Mar 4, 2014 at 14:22
If you are looking for loading an existing class, use Class.forName(classname) — robermann
– robermann, Commented Mar 4, 2014 at 14:24

FD_ · Accepted Answer · 2014-03-04 14:25:36Z

3

What you are looking for is called Reflection in Java: http://developer.android.com/reference/java/lang/reflect/package-summary.html

Please note it is not possible to list classes in a certain package using reflection though.

answered Mar 4, 2014 at 14:25

FD_

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robermann · Accepted Answer · 2014-03-04 14:58:19Z

1

You can load an existing class via Class.forName; your class could also have a static initializer static { /* your init code */ } so that it could be run while loading the class.

Note also that all JDBC drivers are commonly loaded in this way.

answered Mar 4, 2014 at 14:58

robermann

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