- Set your your targetSDKVersion to 22 or higher
- Add the following dependencies to build.gradle for your app to add the wearable support library.
dependencies {
compile 'com.google.android.support:wearable:1.2.0'
provided 'com.google.android.wearable:wearable:1.0.0'
}
- Add the wearable shared library entry into the wearable app manifest:
<application>
<uses-library android:name="com.google.android.wearable"
android:required="false" />
...
</application>
- Add the WAKE_LOCK permission to the handheld and wearable app manifest:
<uses-permission android:name="android.permission.WAKE_LOCK" />
- Have your Activity extend WearableActivity. This will provide the overrides that notify your app when the wearable enters, exits and provides screen updates in ambient mode.
- In the onCreate() method of your activity, call the setAmbientEnabled() method. This tells the framework that the app should enter ambient mode rather than returning to the watch face.
- Set your map to support ambient mode. You can do this by setting the attribute map:ambientEnabled="true" in the activity's XML layout file, or programmatically by setting GoogleMapOptions.ambientEnabled(true). This informs the API to pre-load necessary map tiles for ambient mode.
- When the activity switches to ambient mode, the system calls the onEnterAmbient() method in your wearable activity. Override onEnterAmbient() and call MapFragment.onEnterAmbient() or MapView.onEnterAmbient(). The map changes to a non-interactive, low-color rendering of the map.
- When in ambient mode, your app can update the display every minute by overriding onUpdateAmbient(). If you need more frequent updates, check out this guide.
- When the activity leaves ambient mode, the system calls the onExitAmbient() method in your wearable activity. Override onExitAmbient() and call MapFragment.onExitAmbient() or MapView.onExitAmbient(). The map returns to the normal rendering and is now ready to accept user input.
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