How can two distinct Android apps interact?

Android apps can interact with each other in several ways using the Intent mechanism:

1. Sending the user to another app: You can create implicit intents to launch other apps that can perform a specific action, such as capturing a photo or sharing content[1][3].

2. Getting a result from an activity: You can start another activity and receive a result back from it[1][3]. For example, you can start the camera app to take a picture and get the captured image back in your app.

3. Allowing other apps to start your activity: You can make activities in your app open for use by other apps by defining intent filters in your manifest. This declares the implicit intents your app accepts[1][3].

4. Quick actions: Notifications can include action buttons that allow users to interact with your app directly from the notification. These actions can either open your app or perform a background task[4].

5. Sharing data: Apps can share simple data or files with each other using intents[1].

However, there are some limita...