安卓磨损 : launching an activty in the handheld on clicking notification action button in wear

Question

我想在手持应用程序中启动一个 Activity ，并在用户点击穿戴中的通知操作按钮时发送一些数据。我正在使用以下代码在穿戴中构建通知。

public Notification buildNotification(Context context) {
        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0,
                new Intent(context, MainActivity.class), 0);

        return buildBasicNotification(context).extend(new Notification.WearableExtender()
                .setContentIcon(R.drawable.content_icon_small)
                .setContentIconGravity(Gravity.START))
                .addAction(new Notification.Action(R.drawable.ic_launcher,
                        "Action A", pendingIntent))


                .build();
    }

是否可以仅通过未决 Intent 在手持设备中启动 Activity ，或者我们是否应该在单击操作按钮时在穿戴设备中启动服务/Activity ，并从该 Activity/服务通过消息 api 向设备发送消息。任何帮助将不胜感激!

Answer 1

您的可穿戴设备应用与手持设备应用完全分开，唯一的通信路径是使用消息/数据 API，因此很遗憾，无法根据可穿戴设备上生成的通知直接触发手持设备上的操作。

您在需要采取的方法方面是正确的，但是:

1. 为启动服务的操作创建一个 PendingIntent(IntentService 完美运行)
2. 在该服务中:
   1. 连接到 GoogleApiClient
   2. 如果找到连接的设备，启动 ConfirmationActivity使用 OPEN_ON_PHONE_ANIMATION(这会向您的用户显示一个可见标志，表明您的应用正在他们的手持设备上打开某些内容)
   3. 使用设置的路径(例如，notification/open)向连接的设备发送消息
3. 在您的手持应用程序中，实现 WearableListenerService它将在后台收到您的消息:
   1. 在onMessageReceived()调用，检查收到消息的路径是否为您设置的路径(即 messageEvent.getPath().equals("notification/open"))
   2. 如果匹配，则在您的手持设备上启动适当的 Activity 。

此方法用于 Muzei启动表盘时从未激活手持应用程序中的动态壁纸。涵盖每个部分的代码可以在 Github repository. 上找到

具体来说，步骤 1 和 2 可以在 ActivateMuzeiIntentService 中找到:

public static void showNotification(Context context) {
    Notification.Builder builder = new Notification.Builder(context);
    // Set up your notification as normal

    // Create the launch intent, in this case setting it as the content action
    Intent launchMuzeiIntent = new Intent(context, 
        ActivateMuzeiIntentService.class);
    PendingIntent pendingIntent = PendingIntent.getService(context, 0, 
        launchMuzeiIntent, 0);
    builder.addAction(new Notification.Action.Builder(R.drawable.ic_open_on_phone,
            context.getString(R.string.common_open_on_phone), pendingIntent)
            .extend(new Notification.Action.WearableExtender()
                    .setAvailableOffline(false))
            .build());
    builder.extend(new Notification.WearableExtender()
            .setContentAction(0));

    // Send the notification with notificationManager.notify as usual
}

protected void onHandleIntent(Intent intent) {
    // Open on Phone action
    GoogleApiClient googleApiClient = new GoogleApiClient.Builder(this)
            .addApi(Wearable.API)
            .build();
    ConnectionResult connectionResult =
            googleApiClient.blockingConnect(30, TimeUnit.SECONDS);
    if (!connectionResult.isSuccess()) {
        Log.e(TAG, "Failed to connect to GoogleApiClient.");
        return;
    }
    List<Node> nodes =  Wearable.NodeApi.getConnectedNodes(googleApiClient)
        .await().getNodes();
    // Ensure there is a connected device
    if (!nodes.isEmpty()) {
        // Show the open on phone animation
        Intent openOnPhoneIntent = new Intent(this, ConfirmationActivity.class);
        openOnPhoneIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        openOnPhoneIntent.putExtra(ConfirmationActivity.EXTRA_ANIMATION_TYPE,
                ConfirmationActivity.OPEN_ON_PHONE_ANIMATION);
        startActivity(openOnPhoneIntent);
        // Clear the notification
        NotificationManager notificationManager = (NotificationManager)
                getSystemService(NOTIFICATION_SERVICE);
        notificationManager.cancel(NOTIFICATION_ID);
        // Send the message to the phone to open Muzei
        for (Node node : nodes) {
            Wearable.MessageApi.sendMessage(googleApiClient, node.getId(),
                    "notification/open", null).await();
        }
    }
    googleApiClient.disconnect();
}

然后手持端的第 3 步由 MuzeiWearableListenerService 处理:

public void onMessageReceived(MessageEvent messageEvent) {
    String path = messageEvent.getPath();
    if (path.equals("notification/open")) {

        // In this case, we launch the launch intent for the application
        // but it could be anything
        PackageManager packageManager = getPackageManager();
        Intent mainIntent = packageManager.getLaunchIntentForPackage(
            getPackageName());
        startActivity(mainIntent);
    }
}