来自Android Wear手表的通用Android手机音乐控件

Question

On my Android Wear 2.0 watch, if it's connected to my phone via Bluetooth, when I play music on my phone from any source, the watch automatically switches to some generic audio control app from which I can play/pause/skip/etc on my phone.

This makes me think there must be some interface that would allow me to implement those basic media controls from an app that I'm developing. I haven't been able to find any info, though.

Does anybody have any info about doing that on Android Wear?

Answer 1

You may refer with this sample codelab on how to adapt a music player app to work seamlessly on Android Wear using the latest Android media APIs.

If you use the media APIs, your users can control playback and browse songs on their Android Wear devices without any additional code. With this tutorial, Android Wear automatically connects to the MediaSessionCompat linked by a MediaStyle notification. The latest version of Android Wear also connects to the MediaBrowserServiceCompat for browsing content.

You may also check this tutorial on how to implement an audio media app that works across multiple form factors and provide a consistent user experience on Android phones, tablets, Android Auto, Android Wear , Android TV and Google Cast devices.

Answer 2

See AudioManager.dispatchMediaKeyEvent(KeyEvent keyEvent)

Obviously this code needs to run on what device you want to control. So you could have in run from a WearableListenerService on the phone responding to messages from wear.

The dispatchMediaKeyEvent is Kitkat and above. To support earlier versions you broadcast intents. Intent.ACTION_MEDIA_BUTTON.

Both of these need key down and up events to work, or at least on some devices.

long eventTime = SystemClock.uptimeMillis() - 1;
KeyEvent downEvent = new KeyEvent(eventTime,eventTime,KeyEvent.ACTION_DOWN,KeyEvent.KEYCODE_MEDIA_PAUSE, 0);
audioManager.dispatchMediaKeyEvent(downEvent);

eventTime++;
KeyEvent upEvent = new KeyEvent(eventTime, eventTime, KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PAUSE, 0);
audioManager.dispatchMediaKeyEvent(upEvent);