2.4. Watch Requirements

An Android Watch device refers to an Android device implementation intended to be worn on the body, perhaps on the wrist.

Android device implementations are classified as a Watch if they meet all the following criteria:

• Have a screen with the physical diagonal length in the range from 1.1 to 2.5 inches.
• Have a mechanism provided to be worn on the body.

The additional requirements in the rest of this section are specific to Android Watch device implementations.

2.4.1. Hardware

To be added.

2.4.2. Multimedia

To be added.

2.4.3. Software

Android Watch device implementations:

• [W-0-1] MUST declare the feature android.hardware.type.watch.
• [W-0-2] MUST support uiMode = UI_MODE_TYPE_WATCH.

Search (Section 3.8.4)

• [W-SR] Watch device implementations are STRONGLY RECOMMENDED to implement an assistant on the device to handle the Assist action.

Accessibility (Section 3.10)

• [W-1-1] Android Watch device implementations that declare the android.hardware.audio.output feature flag MUST support third-party accessibility services.

• [W-SR] Android Watch device implementations that declare android.hardware. audio.output are STRONGLY RECOMMENDED to preload accessibility services on the device comparable with or exceeding functionality of the Switch Access and TalkBack (for languages supported by the preloaded Text-to-speech engine) accessibility services as provided in the talkback open source project.

Text-to-Speech (Section 3.11)

If device implementations report the feature android.hardware.audio.output, they:

• [W-SR] STRONGLY RECOMMENDED to include a TTS engine supporting the languages available on the device.

• [W-0-1] MUST support installation of third-party TTS engines.