Xiaomi Redmi Note 8 Pro 64Gb+6Gb Dual LTE [18/132] Watch requirements

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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