push-notification - 通知サンプル - kindle fire

Question

GCM (以前の名称: C2DM) は Kindle Fire デバイスではサポートされていないため、利用可能な他の最適な通知サービスを探しています。Kindle Fire に最適な通知サービスはどれですか?

Answer 1

Amazon Device Messaging API (ベータ) を試す:

Amazon Device Messaging (ADM) を使用すると、アプリを実行している Kindle Fire デバイスにクラウドからプッシュ通知を送信できます。

ADM は、メッセージをキューに入れ、アプリの対象インスタンスに配信するように最適化されたトランスポート メカニズムです。それらのメッセージをどうするかはあなた次第です。たとえば、メッセージを受信すると、アプリは通知を投稿したり、カスタム ユーザー インターフェイスを表示したり、データを同期したりします。

メッセージあたり最大 6KB のクラス最高のペイロード サイズを提供することに加えて、ADM は開発者に無料で提供されます。

通知を送信するためのコード サンプルを次に示します。

/**
 * Request that ADM deliver your message to a specific instance of your app.
 */
public void sendMessageToDevice(String registrationId, String accessToken) throws Exception
{                                        
    // JSON payload representation of the message.
    JSONObject payload = new JSONObject();

    // Define the key/value pairs for your message content and add them to the
    // message payload.
    JSONObject data = new JSONObject();
    data.put("firstKey", "firstValue");
    data.put("secondKey", "secondValue");
    payload.put("data", data);  

    // Add a consolidation key. If multiple messages are pending delivery for a particular
    // app instance with the same consolidation key, ADM will attempt to delivery the most
    // recently added item.
    payload.put("consolidationKey", "ADM_Enqueue_Sample");

    // Add an expires-after value to the message of 1 day. If the targeted app instance does not
    // come online within the expires-after window, the message will not be delivered.
    payload.put("expiresAfter", 86400);      

    // Convert the message from a JSON object to a string.
    String payloadString = payload.toString();

    // Establish the base URL, including the section to be replaced by the registration
    // ID for the desired app instance. Because we are using String.format to create
    // the URL, the %1$s characters specify the section to be replaced.
    String admUrlTemplate = "https://api.amazon.com/messaging/registrations/%1$s/messages";

    URL admUrl = new URL(String.format(admUrlTemplate,registrationId));

    // Generate the HTTPS connection for the POST request. You cannot make a connection
    // over HTTP.
    HttpsURLConnection conn = (HttpsURLConnection) admUrl.openConnection();
    conn.setRequestMethod("POST");
    conn.setDoOutput(true);

    // Set the content type and accept headers.
    conn.setRequestProperty("content-type", "application/json");
    conn.setRequestProperty("accept", "application/json");
    conn.setRequestProperty("X-Amzn-Type-Version ", "com.amazon.device.messaging.ADMMessage@1.0");
    conn.setRequestProperty("X-Amzn-Accept-Type", "com.amazon.device.messaging.ADMSendResult@1.0");

    // Add the authorization token as a header.
    conn.setRequestProperty("Authorization", "Bearer " + accessToken);

    // Obtain the output stream for the connection and write the message payload to it.
    OutputStream os = conn.getOutputStream();
    os.write(payloadString.getBytes(), 0, payloadString.getBytes().length);
    os.flush();
    conn.connect();

    // Obtain the response code from the connection.
    int responseCode = conn.getResponseCode();

    // Check if we received a failure response, and if so, get the reason for the failure.
    if( responseCode != 200)
    {  
        if( responseCode == 401 )
        {
            // If a 401 response code was received, the access token has expired. The token should be refreshed
            // and this request may be retried.
        }

        String errorContent = parseResponse(conn.getErrorStream());             
        throw new RuntimeException(String.format("ERROR: The enqueue request failed with a " +
                                         "%d response code, with the following message: %s",
                                         responseCode, errorContent));
    }
    else
    {
        // The request was successful. The response contains the canonical Registration ID for the specific instance of your
        // app, which may be different that the one used for the request.

        String responseContent = parseResponse(conn.getInputStream());          
        JSONObject parsedObject = new JSONObject(responseContent);

        String canonicalRegistrationId = parsedObject.getString("registrationID");

        // Check if the two Registration IDs are different.
        if(!canonicalRegistrationId.equals(registrationId))
        {              
            // At this point the data structure that stores the Registration ID values should be updated
            // with the correct Registration ID for this particular app instance.
        }
    }

}

private String parseResponse(InputStream in) throws Exception
{
    // Read from the input stream and convert into a String.
    InputStreamReader inputStream = new InputStreamReader(in);
    BufferedReader buff = new BufferedReader(inputStream);

    StringBuilder sb = new StringBuilder();
    String line = buff.readLine();
    while(line != null)
   {         
      sb.append(line);
      line = buff.readLine();
    }

    return sb.toString();
}