我今天一整天都在与 Android Wear Message API 作斗争，最终接受了我需要一些帮助。
我的应用程序非常简单。移动部分由一个 MainActivity（除了显示“Hello world”之外什么也不做）和一个扩展服务组成可穿戴监听服务。 Wear 部分只是一个带有单个 Button 的 MainActivity，并实现MessageApi.MessageListener.
这个想法很简单：按下穿戴设备上的按钮，向移动设备发送消息。当手机收到消息时，它会显示一个带有发送者信息的Toast消息路径 (e.g. /mobile）。执行此操作后，手机应立即发送一条消息back使用我的穿戴设备reply()方法。我想做的就是记录此消息。
我可以完美地完成第一部分。当按下按钮时，手机会弹出一个 Toast，上面写着“/mobile”。然而，这个答复似乎只是迷失在以太中。没有错误，但也没有消息。
有人可以帮助我理解我做错了什么吗？我已将我的文件粘贴在下面。
This http://toastdroid.com/2014/08/18/messageapi-simple-conversations-with-android-wear/是我正在遵循的教程。干杯!
磨损：MainActivity.java
package org.thecosmicfrog.toastdroidmessageapitutorial;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.support.wearable.view.WatchViewStub;
import android.util.Log;
import android.view.View;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.wearable.MessageApi;
import com.google.android.gms.wearable.MessageEvent;
import com.google.android.gms.wearable.Node;
import com.google.android.gms.wearable.NodeApi;
import com.google.android.gms.wearable.Wearable;
import java.util.List;
import java.util.concurrent.TimeUnit;
public class MainActivity extends Activity implements MessageApi.MessageListener {
private final String LOG_TAG = MainActivity.class.getSimpleName();
private static final long CONNECTION_TIME_OUT_MS = 100;
private static final String MOBILE_PATH = "/mobile";
private GoogleApiClient googleApiClient;
private String nodeId;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initGoogleApiClient();
final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub);
stub.setOnLayoutInflatedListener(new WatchViewStub.OnLayoutInflatedListener() {
@Override
public void onLayoutInflated(WatchViewStub stub) {
initWidgets();
}
});
}
private void initGoogleApiClient() {
googleApiClient = getGoogleApiClient(this);
retrieveDeviceNode();
}
private GoogleApiClient getGoogleApiClient(Context context) {
return new GoogleApiClient.Builder(context)
.addApi(Wearable.API)
.build();
}
private void retrieveDeviceNode() {
new Thread(new Runnable() {
@Override
public void run() {
if (googleApiClient != null && !(googleApiClient.isConnected() || googleApiClient.isConnecting()))
googleApiClient.blockingConnect(CONNECTION_TIME_OUT_MS, TimeUnit.MILLISECONDS);
NodeApi.GetConnectedNodesResult result =
Wearable.NodeApi.getConnectedNodes(googleApiClient).await();
List<Node> nodes = result.getNodes();
if (nodes.size() > 0)
nodeId = nodes.get(0).getId();
Log.v(LOG_TAG, "Node ID of phone: " + nodeId);
googleApiClient.disconnect();
}
}).start();
}
private void initWidgets() {
findViewById(R.id.button_toast).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendToast();
}
});
}
private void sendToast() {
if (nodeId != null) {
new Thread(new Runnable() {
@Override
public void run() {
if (googleApiClient != null && !(googleApiClient.isConnected() || googleApiClient.isConnecting()))
googleApiClient.blockingConnect(CONNECTION_TIME_OUT_MS, TimeUnit.MILLISECONDS);
Wearable.MessageApi.sendMessage(googleApiClient, nodeId, MOBILE_PATH, null).await();
googleApiClient.disconnect();
}
}).start();
}
}
@Override
public void onMessageReceived(MessageEvent messageEvent) {
Log.v(LOG_TAG, "In onMessageReceived()");
if (messageEvent.getPath().equals("/wear")) {
Log.v(LOG_TAG, "Success!");
}
}
}
手机：ListenerService.java
package org.thecosmicfrog.toastdroidmessageapitutorial;
import android.util.Log;
import android.widget.Toast;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.wearable.MessageEvent;
import com.google.android.gms.wearable.Wearable;
import com.google.android.gms.wearable.WearableListenerService;
import java.util.concurrent.TimeUnit;
public class ListenerService extends WearableListenerService {
private final String LOG_TAG = ListenerService.class.getSimpleName();
private static GoogleApiClient googleApiClient;
private static final long CONNECTION_TIME_OUT_MS = 100;
private static final String WEAR_PATH = "/wear";
private String nodeId;
@Override
public void onMessageReceived(MessageEvent messageEvent) {
if (messageEvent.getPath().equals("/mobile")) {
nodeId = messageEvent.getSourceNodeId();
Log.v(LOG_TAG, "Node ID of watch: " + nodeId);
showToast(messageEvent.getPath());
reply(WEAR_PATH);
}
}
private void showToast(String message) {
Toast.makeText(this, message, Toast.LENGTH_LONG).show();
}
private void reply(final String path) {
googleApiClient = new GoogleApiClient.Builder(getApplicationContext())
.addApi(Wearable.API)
.build();
Log.v(LOG_TAG, "In reply()");
Log.v(LOG_TAG, "Path: " + path);
if (googleApiClient != null && !(googleApiClient.isConnected() || googleApiClient.isConnecting()))
googleApiClient.blockingConnect(CONNECTION_TIME_OUT_MS, TimeUnit.MILLISECONDS);
Wearable.MessageApi.sendMessage(googleApiClient, nodeId, path, null).await();
googleApiClient.disconnect();
}
}
Mobile MainActivity 非常简单，因此为了清楚起见，我将其省略。
