本文针对手表开发中的问题做一些记录，希望能帮到需要的人，写的不好不对的地方请指教（本文采用Kotlin代码编写，作者的手表为小米手表）。相关demo连接：https://github.com/bestarandyan/TestWearProject

前提条件

1，手机上必须同时装有Wear OS 和小米穿戴 两个app。
2，手表已和手机通过wear OS 和 小米穿戴app 建立连接。

项目创建

创建android wear 项目的过程就不讲解了，很容易能查到，这里只讲一下注意事项。
1，手表app的包名必须和对应的手机app的包名保持一致。
2，手表app的签名文件必须和手机app的签名文件保持一致。
使用GoogleServices 7.8.87的使用方法:
1，mobile app的build.gradle文件中加入

wearApp project(':wearapptest')//换成你的手表app的 project name
implementation 'com.google.android.gms:play-services-wearable:17.0.0'

2，wear app的build.gradle文件中加入

implementation 'com.google.android.gms:play-services-wearable:17.0.0'
compileOnly 'com.google.android.wearable:wearable:2.5.0'
implementation 'com.google.android.support:wearable:2.5.0'

手表和手机之间建立连接(手机和手表通用)

//当前activity实现相关接口
class MainActivity : WearableActivity(), GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener, CapabilityApi.CapabilityListener {

    //....  此处省略了一些无关代码

     var googleApiClient: GoogleApiClient? = null
     private fun connectServer() {
        googleApiClient = GoogleApiClient.Builder(this)
            .addOnConnectionFailedListener(this)
            .addConnectionCallbacks(this)
            .addApi(Wearable.API).build()
        googleApiClient!!.registerConnectionCallbacks(this)
        googleApiClient!!.registerConnectionFailedListener(this)
        googleApiClient!!.connect()
    }
    override fun onConnected(p0: Bundle?) {
        Log.e("wearmain", "连接成功")
    }

    override fun onConnectionSuspended(p0: Int) {
        Log.e("wearmain", "连接中断")
    }

    override fun onConnectionFailed(p0: ConnectionResult) {
        Log.e("wearmain", "连接失败")
    }

}

手表与手机之间的通信（手表和手机通用）

1，数据接收方实现数据监听接口并注册数据监听器

class MainActivity : Activity(),DataClient.OnDataChangedListener, GoogleApiClient.ConnectionCallbacks{

 //....  此处省略了一些无关代码

    override fun onConnected(p0: Bundle?) {
        Log.e("AppLog", "连接成功")
        Wearable.DataApi.addListener(googleApiClient, this)
    }

    override fun onDataChanged(p0: DataEventBuffer?) {
        Log.d("AppLog", "收到发过来的数据")
        for (data in p0!!) {
            val uri = data.dataItem.uri
            val path = uri.path
            if (!TextUtils.isEmpty(path) && "/message" == path) {
                val dataMap = DataMapItem.fromDataItem(data.dataItem).dataMap
                val cmdValue = dataMap.getString("message")
                Log.e("AppLog", "收到数据的时间是：" + dataMap.getString("time"))
            }
        }
    }
}

2，数据发送方发送数据

private fun sendData() {
        val dataMap = PutDataMapRequest.create("/message")
        dataMap.dataMap.putLong("time", Date().time)
        dataMap.dataMap.putString("message","数据时间："+Date().time)
        val request = dataMap.asPutDataRequest()
        request.setUrgent()
        val dataItemTask = Wearable.getDataClient(this).putDataItem(request)
        dataItemTask.addOnSuccessListener { dataItem ->
            Log.e(
                "MobileAppLog",
                "Sending image was successful: $dataItem"
            )
        }
    }

手表app通过RemoteIntent + scheme 启动并唤醒手机app

1，在手机app的Manifest中给需要被打开的activity添加scheme配置
注意：scheme不要用http，因为使用http手机端会出现一个选择框，让你选择使用浏览器打开还是选择应用打开）

<activity
     android:name=".view.home.HomeActivity"
     android:screenOrientation="portrait"
     android:windowSoftInputMode="adjustPan" >
     <intent-filter>
         <!--协议部分，随便设置-->
         <data
             android:host="ingeek"
             android:path="/homeActivity"
             android:port="8080"
             android:scheme="ingeek"/>
         <!--下面这几行也必须得设置-->
         <category android:name="android.intent.category.DEFAULT"/>
         <action android:name="android.intent.action.VIEW"/>
         <category android:name="android.intent.category.BROWSABLE"/>
     </intent-filter>
 </activity>

2，通过RemoteIntent.startRemoteActivity打开第一步中Activity即可

private val ANDROID_MARKET_APP_URI = "ingeek://ingeek:8080/homeActivity?tool_id=100"

    private fun startRemoteIntent() {
        val intentAndroid = Intent(Intent.ACTION_VIEW)
            .addCategory(Intent.CATEGORY_BROWSABLE)
            .setData(Uri.parse(ANDROID_MARKET_APP_URI))

        RemoteIntent.startRemoteActivity(
            applicationContext,
            intentAndroid,
            mResultReceiver
        )
    }

// Result from sending RemoteIntent to phone to open app in play/app store.
    private val mResultReceiver: ResultReceiver = object : ResultReceiver(Handler()) {
        override fun onReceiveResult(resultCode: Int, resultData: Bundle?) {
            if (resultCode == RemoteIntent.RESULT_OK) {
                ConfirmationOverlay().showOn(this@MainActivity)
                Log.e("wearmain", "启动app成功")
            } else if (resultCode == RemoteIntent.RESULT_FAILED) {
                ConfirmationOverlay()
                    .setType(ConfirmationOverlay.FAILURE_ANIMATION)
                    .showOn(this@MainActivity)
                Log.e("wearmain", "启动app失败")
            } else {
                throw IllegalStateException("Unexpected result $resultCode")
            }
        }
    }