Transferir dados do Wear OS para um novo dispositivo móvel
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Quando os usuários configuram um dispositivo Wear OS, eles o conectam a um
dispositivo móvel específico. Mais tarde, o usuário pode decidir comprar um novo dispositivo móvel
e conectar o dispositivo Wear OS a ele. Alguns dados
relacionados a um dispositivo Wear OS são armazenados no dispositivo móvel conectado no momento.
A partir do Wear OS 4, os usuários podem
transferir dados do Wear OS para um novo dispositivo móvel. Esses dados são sincronizados automaticamente
ao serem transferidos.
Quando o usuário solicita uma transferência, a camada de dados wearable envia
objetos DataItem, originalmente armazenados em um dispositivo móvel, para outro
dispositivo. Isso proporciona a melhor experiência aos usuários do seu app.
Este documento descreve como configurar o app para Wear OS e o
app complementar para dispositivos móveis, para dar suporte a esse cenário.
Preparação
O processo de transferência de dados processa objetos DataItem de maneira diferente, dependendo de
qual app é o proprietário dos dados:
Objetos que pertencem ao app para Wear OS
Esses objetos são preservados no dispositivo Wear OS.
Objetos que pertencem ao app para dispositivos móveis
Esses objetos são arquivados no dispositivo antigo. Em seguida, o sistema empacota os
dados arquivados em um objeto DataItemBuffer e os entrega ao
app para dispositivos móveis instalado no novo dispositivo.
Imediatamente após o envio do arquivo, a camada de dados wearable invoca
o listener onNodeMigrated(), da mesma forma que o app é notificado
quando os dados são gravados pelo dispositivo Wear OS.
Preservar dados transferidos
É responsabilidade do app preservar os objetos DataItem transferidos.
Logo após a entrega dos dados ao novo dispositivo móvel, o arquivo é
excluído do dispositivo antigo.
Confira se todas as condições abaixo são verdadeiras:
O app está instalado nos dois dispositivos móveis envolvidos na
transferência.
Os apps instalados em cada dispositivo móvel têm assinaturas de
pacote correspondentes.
Caso contrário, os objetos DataItem arquivados não serão entregues e serão
descartados.
Receber dados do dispositivo móvel antigo
Para receber dados que foram arquivado no dispositivo móvel antigo
no novo dispositivo móvel, seu app precisa implementar o callback onNodeMigrated(),
parte da classe WearableListenerService. Para isso, siga estas
etapas:
No arquivo de build do app para dispositivos móveis, inclua uma dependência da versão mais recente
da biblioteca de wearables no Google Play Services:
Crie uma classe de serviço que estenda WearableListenerService e modifique
onNodeMigrated().
Kotlin
classMyWearableListenerService:WearableListenerService(){valdataClient:DataClient=Wearable.getDataClient(this)privatefunshouldHandleDataItem(nodeId:String,dataItem:DataItem):Boolean{// Your logic herereturndataItem.uri.path?.startsWith("/my_feature_path/")==true}privatefunhandleDataItem(nodeId:String,dataItem:DataItem){valdata=dataItem.data?:returnvalpath=dataItem.uri.path?:return// Your logic hereif(data.toString().startsWith("Please restore")){dataClient.putDataItem(PutDataRequest.create(path).setData(data))}}overridefunonNodeMigrated(nodeId:String,archive:DataItemBuffer){valdataItemsToHandle=mutableListOf<DataItem>()for(dataIteminarchive){if(shouldHandleDataItem(nodeId,dataItem)){dataItemsToHandle.add(dataItem.freeze())}}// Callback stops automatically after 20 seconds of data processing.// If you think you need more time, delegate to a coroutine or thread.runBlocking{for(dataItemindataItemsToHandle){handleDataItem(nodeId,dataItem)}}}}
Java
publicclassMyWearableListenerServiceextendsWearableListenerService{privatefinalDataClientdataClient=Wearable.getDataClient(this);privatebooleanshouldHandleDataItem(StringnodeId,DataItemdataItem){// Your logic herereturnObjects.requireNonNull(dataItem.getUri().getPath()).startsWith("/my_feature_path/");}privateTask<DataItem>handleDataItem(StringnodeId,DataItemdataItem){byte[]data=dataItem.getData();Stringpath=dataItem.getUri().getPath();// Your logic hereif(data!=null && path!=null && Arrays.toString(data).startsWith("Please restore")){assertpath!=null;returndataClient.putDataItem(PutDataRequest.create(path).setData(data));}@OverridepublicvoidonNodeMigrated(@NonNullStringnodeId,DataItemBufferarchive){List<DataItem>dataItemsToHandle=newArrayList<>();for(DataItemdataItem:archive){if(shouldHandleDataItem(nodeId,dataItem)){dataItemsToHandle.add(dataItem.freeze());}}for(dataItemindataItemsToHandle){handleDataItem(nodeId,dataItem);}// Callback stops automatically after 20 seconds of data processing.// If you think you need more time, delegate to another thread.}}
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Última atualização 2025-08-30 UTC.
[[["Fácil de entender","easyToUnderstand","thumb-up"],["Meu problema foi resolvido","solvedMyProblem","thumb-up"],["Outro","otherUp","thumb-up"]],[["Não contém as informações de que eu preciso","missingTheInformationINeed","thumb-down"],["Muito complicado / etapas demais","tooComplicatedTooManySteps","thumb-down"],["Desatualizado","outOfDate","thumb-down"],["Problema na tradução","translationIssue","thumb-down"],["Problema com as amostras / o código","samplesCodeIssue","thumb-down"],["Outro","otherDown","thumb-down"]],["Última atualização 2025-08-30 UTC."],[],[],null,["When users [set up a Wear OS device](https://support.google.com/wearos/answer/6056630), they connect the Wear OS device to a\nparticular mobile device. The user might later decide to get a new mobile device\nand connect their existing Wear OS device to this new mobile device. Some data\nrelated to a Wear OS device is stored on the currently-connected mobile device.\n\nStarting in Wear OS 4, when users connect to a new mobile device, they can\ntransfer Wear OS data to the new mobile device. Data is synced automatically\nwhen it's transferred.\n| **Note:** This process of transferring data to a new mobile device is different from [cloud backup and restore](/training/wearables/data/cloud-backup-restore), where the user restores data to a new Wear OS device.\n\nWhen the user requests a transfer, the [Wearable Data Layer](/training/wearables/data/data-layer) delivers\n[`DataItem`](https://developers.google.com/android/reference/com/google/android/gms/wearable/DataItem) objects, originally stored on one mobile device, to the other\nmobile device. This allows a seamless experience for users of your app.\n\nThis document describes how you can configure your Wear OS app, and its\ncompanion mobile app, to support this scenario.\n\nPreparation\n\nThe data transfer process handles `DataItem` objects differently, depending on\nwhich app owns the data:\n\nObjects owned by the Wear OS app\n: These objects are preserved on the Wear OS device.\n\nObjects owned by the mobile app\n\n: These objects are archived on the old device. The system then packages the\n archived data into a [`DataItemBuffer`](https://developers.google.com/android/reference/com/google/android/gms/wearable/DataItemBuffer) object and delivers this data to the\n mobile app that's installed on the new mobile device.\n\n Immediately after the archive is delivered, the Wearable Data Layer invokes\n the [`onNodeMigrated()`](https://developers.google.com/android/reference/com/google/android/gms/wearable/WearableListenerService#onNodeMigrated(java.lang.String,%20com.google.android.gms.wearable.DataItemBuffer)) listener, similarly to how your app is notified\n when data is written by the Wear OS device.\n | **Note:** Data is transferred only if it's stored in the Wearable Data Layer.\n\nPreserve transferred data **Warning:** To avoid losing data, follow the guidance in this section.\n\nIt's your app's responsibility to preserve the transferred `DataItem` objects.\nShortly after the data is delivered to the new mobile device, the archive is\ndeleted off of the old device.\n\nMake sure each of the following conditions is true:\n\n1. Your app is installed on both mobile devices that are involved in the transfer.\n2. The mobile apps, installed on each mobile device, have package signatures that match.\n\nOtherwise, the archived `DataItem` objects aren't delivered and are instead\ndiscarded.\n\nReceive data from the old mobile device\n\nTo receive data on the new mobile device that was archived on the old mobile\ndevice, your mobile app must implement the [`onNodeMigrated()`](https://developers.google.com/android/reference/com/google/android/gms/wearable/WearableListenerService#onNodeMigrated(java.lang.String,%20com.google.android.gms.wearable.DataItemBuffer)) callback,\npart of the `WearableListenerService` class. To do so, complete the following\nsteps:\n\n1. In your mobile app's build file, include a dependency on the latest version\n of the wearable library in Google Play services:\n\n ```groovy\n dependencies {\n ...\n implementation 'com.google.android.gms:play-services-wearable:19.0.0'\n }\n ```\n2. Declare and export the `WearableListenerService` in your app's\n manifest file:\n\n \u003cservice\n android:name=\".MyWearableListenerService\"\n android:exported=\"true\"\u003e\n \u003cintent-filter\u003e\n ...\n \u003caction android:name=\"com.google.android.gms.wearable.NODE_MIGRATED\" /\u003e\n \u003cdata android:scheme=\"wear\" /\u003e\n \u003c/intent-filter\u003e\n \u003c/service\u003e\n\n3. Create a service class which extends `WearableListenerService` and overrides\n `onNodeMigrated()`.\n\n **Caution:** To preserve system resources such as battery life, and to prevent ANRs, don't execute any power-demanding or time-consuming tasks in the `onNodeMigrated()` handler. \n\n Kotlin \n\n ```kotlin\n class MyWearableListenerService : WearableListenerService() {\n val dataClient: DataClient = Wearable.getDataClient(this)\n\n private fun shouldHandleDataItem(nodeId: String,\n dataItem: DataItem): Boolean {\n // Your logic here\n return dataItem.uri.path?.startsWith(\"/my_feature_path/\") == true\n }\n\n private fun handleDataItem(nodeId: String, dataItem: DataItem) {\n val data = dataItem.data ?: return\n val path = dataItem.uri.path ?: return\n // Your logic here\n if (data.toString().startsWith(\"Please restore\")) {\n dataClient.putDataItem(\n PutDataRequest.create(path).setData(data)\n )\n }\n }\n\n override fun onNodeMigrated(nodeId: String, archive: DataItemBuffer) {\n val dataItemsToHandle = mutableListOf\u003cDataItem\u003e()\n\n for (dataItem in archive) {\n if (shouldHandleDataItem(nodeId, dataItem)) {\n dataItemsToHandle.add(dataItem.freeze())\n }\n }\n\n // Callback stops automatically after 20 seconds of data processing.\n // If you think you need more time, delegate to a coroutine or thread.\n runBlocking {\n for (dataItem in dataItemsToHandle) {\n handleDataItem(nodeId, dataItem)\n }\n }\n }\n }\n ```\n\n Java \n\n ```java\n public class MyWearableListenerService extends WearableListenerService {\n private final DataClient dataClient = Wearable.getDataClient(this);\n\n private boolean shouldHandleDataItem(String nodeId, DataItem dataItem) {\n // Your logic here\n return Objects.requireNonNull(dataItem.getUri().getPath())\n .startsWith(\"/my_feature_path/\");\n }\n\n private Task\u003cDataItem\u003e handleDataItem(String nodeId, DataItem dataItem) {\n byte[] data = dataItem.getData();\n String path = dataItem.getUri().getPath();\n // Your logic here\n if (data != null && path != null && Arrays.toString(data)\n .startsWith(\"Please restore\")) {\n assert path != null;\n return dataClient.putDataItem(\n PutDataRequest.create(path).setData(data));\n }\n\n @Override\n public void onNodeMigrated(@NonNull String nodeId, DataItemBuffer archive) {\n List\u003cDataItem\u003e dataItemsToHandle = new ArrayList\u003c\u003e();\n\n for (DataItem dataItem : archive) {\n if (shouldHandleDataItem(nodeId, dataItem)) {\n dataItemsToHandle.add(dataItem.freeze());\n }\n }\n\n for (dataItem in dataItemsToHandle) {\n handleDataItem(nodeId, dataItem);\n }\n\n // Callback stops automatically after 20 seconds of data processing.\n // If you think you need more time, delegate to another thread.\n }\n }\n ```\n\nRecommended for you\n\n- Note: link text is displayed when JavaScript is off\n- [Integrate a Wear OS module](/health-and-fitness/guides/basic-fitness-app/integrate-wear-os)\n- [Conserve power and battery](/training/wearables/apps/power)"]]