App Components

Android apps are primarily made up of five different types of components:

1. Activities: These are individual screens that a user can interact with. Any UI action like touching a button or swiping a screen will usually take place within an activity.

2. Services: Unlike activities, services run in the background and don't have a user interface. They’re used for repetitive or long running operations, like playing music or pulling in a feed of data from a server.

3. Broadcast Receivers: These are event listeners. The Android operating system uses them to respond to system-wide events.

4. Content Providers: They manage and share app data with other apps installed on the device. For security, data is not generally shared across apps.

5. Intents: These serve as messages or commands to the Android system. They're used to signal to the Android system that certain events have occurred.

Visit the following resources to learn more:

• @official@App Fundamentals
• @article@Android App Components