How to pass an object from one activity to another on Android

There are several ways you can pass an object from one activity to another on Android:

1. Using Intent Extras: You can put the object in the Intent that you use to start the second activity. To do this, you need to make the object Parcelable or Serializable, then use the putExtra method of the Intent class to pass the object.

2. Using a Singleton: You can use a singleton class to store the object, and then retrieve it from the second activity.

3. Using a Static Field: You can create a static field in your first activity and set it to the object you want to pass. The second activity can then access the static field to retrieve the object.

4. Using a Shared ViewModel: If you are using the Android Architecture Components library, you can use a ViewModel to store the object and pass it between activities.

5. Using a Database: If the object you want to pass is large or you want to persist it, you can store it in a database and pass the object's ID to the second activity. The second activity can then query the database to retrieve the object.