![]() ![]() ![]() In the above snippet, you also notice an intent-filter tag with an action and category item. When you have an Activity class created, manually or through one of the Android Studio templates, you need to define it in the project's AndroidManifest.xml file, if it wasn't already added, like so: Activities act as a single screen that is displayed to the user and they often encapsulate a lot of your program's logic. Activities are a key part of the Android ecosystem and one of the first concepts that you need to grasp as you become more familiar with Android development.
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