检测可穿戴设备与Android手机的连接/断开连接

Question

当Pebble连接/断开时,Pebble手表具有全局发送的Intent.这允许手机应用程序知道手表是否已连接.我搜索过,但我无法找到有关Android Wear类似功能的信息.怎么知道可穿戴设备是否连接到手机？有可能收到像Pebble这样的活动吗？谢谢

Answer 1

您是否尝试过NodeApi？getConnectedNodes

获取此设备当前连接的节点列表.

或者addListener(GoogleApiClient client, NodeApi.NodeListener listener)哪个

注册侦听器以接收所有节点事件.

然后你可以使用回调 NodeApi.NodeListener

onPeerConnected(Node peer) and onPeerDisconnected(Node peer)

Answer 2

您可以通过扩展 WearableListenerService 并重写 onConnectedNodes() 方法轻松地做到这一点。

穿戴面

public class DisconnectListenerService extends WearableListenerService implements GoogleApiClient.ConnectionCallbacks {

/* the capability that the phone app would provide */
private static final String CONNECTION_STATUS_CAPABILITY_NAME = "is_connection_lost";

private GoogleApiClient mGoogleApiClient;

@Override
public void onCreate() {
    super.onCreate();
    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addApi(Wearable.API)
            .addConnectionCallbacks(this)
            .build();
}

@Override
public void onConnectedNodes(List<Node> connectedNodes) {
    if (mGoogleApiClient.isConnected()) {
        updateStatus();
    } else if (!mGoogleApiClient.isConnecting()) {
        mGoogleApiClient.connect();
    }
}

private void updateStatus() {
    Wearable.CapabilityApi.getCapability(
            mGoogleApiClient, CONNECTION_STATUS_CAPABILITY_NAME,
            CapabilityApi.FILTER_REACHABLE).setResultCallback(
            new ResultCallback<CapabilityApi.GetCapabilityResult>() {
                @Override
                public void onResult(CapabilityApi.GetCapabilityResult result) {
                    if (result.getStatus().isSuccess()) {
                        updateConnectionCapability(result.getCapability());
                    } else {
                        Log.e(TAG, "Failed to get capabilities, " + "status: " + result.getStatus().getStatusMessage());
                    }
                }
            });
}

private void updateConnectionCapability(CapabilityInfo capabilityInfo) {
    Set<Node> connectedNodes = capabilityInfo.getNodes();
    if (connectedNodes.isEmpty()) {
        // The connection is lost !
    } else {
        for (Node node : connectedNodes) {
            if (node.isNearby()) {
                // The connection is OK !
            }
        }
    }
}

@Override
public void onConnected(Bundle bundle) {
    updateStatus();
}

@Override
public void onConnectionSuspended(int cause) {

}

@Override
public void onDestroy() {
    if (mGoogleApiClient.isConnected() || mGoogleApiClient.isConnecting()) {
        mGoogleApiClient.disconnect();
    }
    super.onDestroy();
    }
}

手机端

在values/目录中创建一个名为wear.xml的xml文件

<resources>
    <string-array name="android_wear_capabilities">
        <item>is_connection_lost</item>
    </string-array>
</resources>

有关更多信息，请查看我在Stack Overflow Question中的解决方案