无法从可穿戴片段连接到Google API客户端

Question

我在可穿戴应用程序中创建了一个片段，其中我需要使用Google API客户端的消息API将消息发送到手持设备。google未连接，并且它始终将日志显示为“未连接”。我在可穿戴设备上添加了元数据。请找到下面的代码和帮助，从可穿戴应用程序连接到Google API客户端。

还有一个问题，当我们想要从可穿戴设备向手持设备发送消息时，我们需要有监听器服务吗？

BlankFragment.java

package com.andr.assestdatatransferdemo;


import android.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;
import com.google.android.gms.wearable.DataApi;
import com.google.android.gms.wearable.DataEventBuffer;
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;


/**
 * A simple {@link Fragment} subclass.
 * Use the {@link BlankFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class BlankFragment extends Fragment  implements GoogleApiClient.ConnectionCallbacks,
        OnConnectionFailedListener, DataApi.DataListener, MessageApi.MessageListener,
        NodeApi.NodeListener{
    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    private static final String START_ACTIVITY_PATH = "/start-activity";
    private GoogleApiClient mGoogleApiClient;
    public static final String IMAGE_PATH = "/image";


    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment BlankFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static BlankFragment newInstance(String param1, String param2) {
        BlankFragment fragment = new BlankFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    public BlankFragment() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }

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

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View v = inflater.inflate(R.layout.fragment_blank, container, false);
        if(mGoogleApiClient.isConnected()){
            Log.d("TAG","Connected");
        }
        else{
            Log.d("TAG","Not Connected");
        }
        return v;

    }

    @Override
    public void onPeerConnected(Node node) {

    }

    @Override
    public void onPeerDisconnected(Node node) {

    }

    @Override
    public void onMessageReceived(MessageEvent messageEvent) {

    }

    @Override
    public void onDataChanged(DataEventBuffer dataEventBuffer) {

    }

    @Override
    public void onConnected(Bundle bundle) {

    }

    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {

    }
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.andr.assestdatatransferdemo" >

    <uses-feature android:name="android.hardware.type.watch" />

    <uses-permission android:name="android.permission.WAKE_LOCK" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/MyMaterialTheme" >
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
        <service
            android:name=".DataLayerListenerService" >
            <intent-filter>
                <action android:name="com.google.android.gms.wearable.BIND_LISTENER" />
            </intent-filter>
        </service>
        <uses-library
            android:name="com.google.android.wearable"
            android:required="false" />

        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

有没有人可以帮我找出我犯的错误，因为我总是在onCreateView()方法上得到未连接的消息？

提前谢谢。

Answer 1

你为什么不使用你设置的onConnected？

@Override
    public void onConnected(Bundle bundle) {

    }

来检索连接状态？可能在onCreateView()上，GoogleApiClient尚未连接。

您已经声明了一个WearableListenerService来处理所有传入的消息，所以您可能不需要实现所有其他监听器

DataApi.DataListener，MessageApi.MessageListener

。

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

要将消息发送到手持设备或智能手表，请使用以下代码：

private void sendMessage(final String path, final String text) {
    new Thread(new Runnable() {
        @Override
        public void run() {
            NodeApi.GetConnectedNodesResult nodes = Wearable.NodeApi.getConnectedNodes(mApiClient).await();
            for (Node node : nodes.getNodes()) {
                Wearable.MessageApi.sendMessage(mApiClient, node.getId(), path, text.getBytes()).await();
            }

        }
    }).start();
}

建议使用线程，因为该操作可能需要一些时间来阻塞UI。