我想发送消息给所有设备,但我只发送到一个设备,这是我如何发送消息:我只能发送消息给一个用户,当我在我的方法中删除此消息以发送消息:Java Firebase云消息。发送消息给所有
json.put("to", tokenId.trim());
消息不发送给没有人,当我有这条线我只发送一条消息给一个用户。我如何向每个人发送消息?
static void send_FCM_Notification(String tokenId, String server_key, String message) {
try {
URL url = new URL(FCM_URL);
// create connection.
HttpURLConnection conn;
conn = (HttpURLConnection) url.openConnection();
conn.setUseCaches(false);
conn.setDoInput(true);
conn.setDoOutput(true);
//set method as POST or GET
conn.setRequestMethod("POST");
//pass FCM server key
conn.setRequestProperty("Authorization", "key=" + server_key);
//Specify Message Format
conn.setRequestProperty("Content-Type", "application/json");
//Create JSON Object & pass value
JSONObject infoJson = new JSONObject();
infoJson.put("title", "Wiadomosc z serwera");
infoJson.put("sound", "default");
infoJson.put("icon", "ic_launcher");
infoJson.put("body", message);
JSONObject json = new JSONObject();
json.put("to", tokenId.trim());
json.put("notification", infoJson);
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(json.toString());
wr.flush();
int status = 0;
if (null != conn) {
status = conn.getResponseCode();
}
if (status != 0) {
if (status == 200) {
//SUCCESS message
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
System.out.println("Android Notification Response : " + reader.readLine());
} else if (status == 401) {
//client side error
System.out.println("Notification Response : TokenId : " + tokenId + " Error occurred : 401");
} else if (status == 501) {
//server side error
System.out.println("Notification Response : [ errorCode=ServerError ] TokenId : " + tokenId);
} else if (status == 503) {
//server side error
System.out.println("Notification Response : FCM Service is Unavailable TokenId : " + tokenId);
}
}
} catch (MalformedURLException mlfexception) {
// Prototcal Error
System.out.println("Error occurred while sending push Notification!.." + mlfexception.getMessage());
} catch (IOException mlfexception) {
//URL problem
System.out.println("Reading URL, Error occurred while sending push Notification!.." + mlfexception.getMessage());
} catch (JSONException jsonexception) {
//Message format error
System.out.println("Message Format, Error occurred while sending push Notification!.." + jsonexception.getMessage());
} catch (Exception exception) {
//General Error or exception.
System.out.println("Error occurred while sending push Notification!.." + exception.getMessage());
}
}
见http://stackoverflow.com/questions/37634563/fcm-firebase -cloud-messaging-how-to-send-to-all-phones –