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
Watch device implementations:
[
7.1
.1.1/W-0-1] MUST have a screen with the physical diagonal size in the range from 1.1
to 2.5 inches.
[
7.2
.3/W-0-1] MUST have the Home function available to the user, and the Back function
except for when it is in
UI_MODE_TYPE_WATCH
.
[
7.2
.4/W-0-1] MUST support touchscreen input.
[
7.3
.1/W-SR] Are STRONGLY RECOMMENDED to include a 3-axis accelerometer.
[
7.4
.3/W-0-1] MUST support Bluetooth.
[
7.6
.1/W-0-1] MUST have at least 1 GB of non-volatile storage available for application
private data (a.k.a. "/data" partition).
[
7.6
.1/W-0-2] MUST have at least 416 MB memory available to the kernel and userspace.
[
7.8
.1/W-0-1] MUST include a microphone.
[
7.8
.2/W] MAY but SHOULD NOT have audio output.
2.4.2. Multimedia
No additional requirements.
2.4.3. Software
Watch device implementations:
[
3
/W-0-1] MUST declare the feature
android.hardware.type.watch
.
[
3
/W-0-2] MUST support uiMode =
UI_MODE_TYPE_WATCH
.
Watch device implementations:
[
3.8
.4/W-SR] Are STRONGLY RECOMMENDED to implement an assistant on the device to
handle the
Assist action
.
Watch device implementations that declare the
android.hardware.audio.output
feature flag:
[
3.10
/W-1-1] MUST support third-party accessibility services.
[
3.10
/W-SR] Are STRONGLY RECOMMENDED to preload accessibility services on the
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