在Android Wear中单击按钮

这可以使用提到的MessageApi完成：http : //developer.android.com/training/wearables/data-layer/messages.html
您需要初始化并与GoogleApiClient连接。单击按钮后，您必须获取节点列表并向其发送消息。最后一步是从应用程序的手机部分读取此消息，这可以通过注册适当的WearableListenerService来完成。请参阅下面的示例代码。

应用程序的可穿戴部分：
请在应用程序的可穿戴部分中定义此类活动：

public class WearableButtonActivity extends Activity {

    private GoogleApiClient mGoogleApiClient;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.wearable_button_activity);

        mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addApi(Wearable.API)
            .build();
        mGoogleApiClient.connect();
    }

    public void onButtonClicked(View target) {
        if (mGoogleApiClient == null)
            return;

        final PendingResult<NodeApi.GetConnectedNodesResult> nodes = Wearable.NodeApi.getConnectedNodes(mGoogleApiClient);
        nodes.setResultCallback(new ResultCallback<NodeApi.GetConnectedNodesResult>() {
            @Override
            public void onResult(NodeApi.GetConnectedNodesResult result) {
                final List<Node> nodes = result.getNodes();
                if (nodes != null) {
                    for (int i=0; i<nodes.size(); i++) {
                        final Node node = nodes.get(i);

                        // You can just send a message
                        Wearable.MessageApi.sendMessage(mGoogleApiClient, node.getId(), "/MESSAGE", null);

                        // or you may want to also check check for a result:
                        // final PendingResult<SendMessageResult> pendingSendMessageResult = Wearable.MessageApi.sendMessage(mGoogleApiClient, node.getId(), "/MESSAGE", null);
                        // pendingSendMessageResult.setResultCallback(new ResultCallback<MessageApi.SendMessageResult>() {
                        //      public void onResult(SendMessageResult sendMessageResult) {
                        //          if (sendMessageResult.getStatus().getStatusCode()==WearableStatusCodes.SUCCESS) {
                        //              // do something is successed
                        //          }
                        //      }
                        // });
                    }
                }
            }
        });
    }
}

并在您的res / layout / wearable_button_activity.xml文件中将onButtonClick方法攻击到您的按钮：

<Button android:id="@+id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Click me!"
    android:layout_gravity="center"
    android:onClick="onButtonClicked" />

或者，如果您喜欢的话，也可以通过代码设置OnClickListener：

    findViewById(R.id.button).setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            onButtonClicked(v);
        }
    });

应用程序的电话部分：
然后在电话清单上声明DataLayerListenerService：

<service android:name=".DataLayerListenerService" >
    <intent-filter>
        <action android:name="com.google.android.gms.wearable.BIND_LISTENER" />
    </intent-filter>
</service>

DataLayerListenerService类：

public class DataLayerListenerService extends WearableListenerService {

    @Override
    public void onMessageReceived(MessageEvent messageEvent) {
        super.onMessageReceived(messageEvent);
        if("/MESSAGE".equals(messageEvent.getPath())) {
            // launch some Activity or do anything you like
        }
    }
}

重要说明：应用程序的两个部分都需要具有相同的程序包名称才能相互联系。