Adapter Design Pattern

Contents
Gangs of Four(GOF) - Definition
General reference scenario
Examples in Android
Programming Example

Gangs of Four(GOF) - Definition

Provides an interface between two unrelated entities so that they can work together.

General reference scenario

• Consider there is a new device we want to connect to our computer via Bluetooth
• Computer has a Bluetooth device which connects to external devices via `Bluetooth
• The software of the new device that has to be connected to the computer is different.
• Similarly the software of the computer Bluetooth is different.
• Our goal is to link them but both are different and can't be linked directly.
• We use the adapter pattern to solve this problem.

Examples in Android

• One good example in Android programming is the usage of an adapter in populating the list.
• There will be a data source in the activity/fragment and we need to display it in a certain way in the list.
• The adapter will form a mediation between the data source and how it should be displayed.

Programming Example