Android Wear data types and interfaces for sending and synchronizing data overview

The Android wear Data Layer API is part of the Google Play service, a communication channel for your handheld devices and wearable applications. The API includes a series of data objects that allow the system to notify the app data layer of important events through listeners and lines.

The following are several object types.

Data Item

Provides data storage for automatic synchronization of mobile phones and wear.

Messages

The Messaging API can implement Fire-and-forget mode, such as controlling the handset player control in wear or sending an intent to wear via the phone, which provides the message when a connection is established or a transmission error occurs. The message is a typical one-way transmission of the command pattern.

Asset

This object is used to transmit binary data, like that the object can be converted to be carried in the data item, the system can automatically transfer for you.

Wearablelistenerservice

The implementation of the service can listen to the system data layer time in the service, the system manages the life cycle of the service, when the need to send the data item and the message is bound to the service, and when not needed, unbind.

Datalistener

< Span style= "font-size:18px" > implementation of the interface in the activity can listen to data layer events, when the activity in the active state, using the interface can let you replace wearablelistenerservice uses the app to listen for changes in the data layer.