Android Application Keyboard Enter/Send Key

Question

While using messaging services built inside different applications, I noticed that the Enter key on some applications is replaced by a send key. As an example, the attached 5 screenshots are from Facebook Messenger, Instagram, Snapchat, Twitter and my own application.

As you can see, Snapchat and Instagram have the bottom-right key of the keyboard set as send with the special icon. Rest of them, including mine, do not have that. I tried to look around but could not find any documentation or suggestions on how to achieve this.

Where do I even start to achieve something like this?

Footnote 1: I am using a Google Pixel 2 XL with Google Keyboard, but I have seen similar functionality on other devices.

Footnote 2: I have seen a question on overwriting the enter key's input to call a function but am looking for more traditional/sophisticated method (preferably with custom send icon).

Footnote 3: Order of images: My application, Snapchat, Messenger, Twitter, Instagram.

Footnote 4: I am not specifically looking to make an entire custom keyboard. I want to keep rest of the multimedia functions brought by Google Keyboard.

Answer 1

Use android:imeOptions="actionSend" on your EditText widget.