Question

我有一个使用REST Web服务的简单Android应用程序。现在我想使用GCM从我的REST Web服务向Android应用程序发送通知。

这是怎么回事？这个要求有没有简单的教程？我搜索并找到了Google API，但我不明白。

Answer 1

我为GCMUtils项目创建了一个基于Java的测试服务器，实现为maven插件： https://code.google.com/p/gcmutils/wiki/MavenPlugin#Test_server

以下是源代码：https://github.com/jarlehansen/gcmutils/tree/master/gcm-test-server

maven插件的来源：https://github.com/jarlehansen/gcmutils/tree/master/gcmutils-maven-plugin

也许这可以帮助您入门？

Answer 2

这是一个用于从java向app android发送通知的函数。此代码使用JSONObject，您必须将此jar添加到项目构建路径中。

注意：我使用fcm

 import java.io.OutputStreamWriter;
 import java.net.HttpURLConnection;
 import java.net.URL;

import org.json.JSONObject;

public class FcmNotif {
  public final static String AUTH_KEY_FCM ="AIzB***********RFA";
  public final static String API_URL_FCM = "https://fcm.googleapis.com/fcm/send";

// userDeviceIdKey is the device id you will query from your database

public void pushFCMNotification(String userDeviceIdKey, String title, String message) throws Exception{

String authKey = AUTH_KEY_FCM;   // You FCM AUTH key
String FMCurl = API_URL_FCM;     

URL url = new URL(FMCurl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();

conn.setUseCaches(false);
conn.setDoInput(true);
conn.setDoOutput(true);

conn.setRequestMethod("POST");
conn.setRequestProperty("Authorization","key="+authKey);
conn.setRequestProperty("Content-Type","application/json");

JSONObject json = new JSONObject();
json.put("to",userDeviceIdKey.trim());
JSONObject info = new JSONObject();
info.put("title", title); // Notification title
info.put("body", message); // Notification body
info.put("image", "https://lh6.googleusercontent.com/-sYITU_cFMVg/AAAAAAAAAAI/AAAAAAAAABM/JmQNdKRPSBg/photo.jpg");
info.put("type", "message");
json.put("data", info);
System.out.println(json.toString());

OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(json.toString());
wr.flush();
conn.getInputStream();
}
}

祝你好运

Answer 3

关注此网址 https://firebase.google.com/docs/cloud-messaging/send-message

FCM网址

private String ANDROID_NOTIFICATION_URL = "https://fcm.googleapis.com/fcm/send"

通知密钥

private String ANDROID_NOTIFICATION_KEY = "Your key";

Java代码

private void sendAndroidNotification(String deviceToken,String message,String title) throws IOException {
        OkHttpClient client = new OkHttpClient();
        MediaType mediaType = MediaType.parse("application/json");
        JSONObject obj = new JSONObject();
        JSONObject msgObject = new JSONObject();
        msgObject.put("body", message);
        msgObject.put("title", title);
        msgObject.put("icon", ANDROID_NOTIFICATION_ICON);
        msgObject.put("color", ANDROID_NOTIFICATION_COLOR);

        obj.put("to", deviceToken);
        obj.put("notification",msgObject);

        RequestBody body = RequestBody.create(mediaType, obj.toString());
        Request request = new Request.Builder().url(ANDROID_NOTIFICATION_URL).post(body)
                .addHeader("content-type", CONTENT_TYPE)
                .addHeader("authorization", "key="+ANDROID_NOTIFICATION_KEY).build();

        Response response = client.newCall(request).execute();
        logger.debug("Notification response >>>" +response.body().string());
    }

就是这样!!!

Answer 4

package com.test;

import java.io.BufferedReader; import java.io.IOException;进口 java.io.InputStreamReader中; import java.io.OutputStream;进口 java.net.HttpURLConnection中; import java.net.URL;

公共类Firebase {
```
public static void main(String[] args) throws IOException {         final
```
String apiKey = “AAAAqf1B9uQ：********** _ 1MoeQBVPbVROXuyD4ERyV-i6nva0LAic9uRotN80C9utoaGL9Sp1GjrPr5-mtJBlxVNbuqG1zeg9LBnslZw-vyud3jW-11SWDfLBB26bcHuAi8bdnQCPcj3DWKX2h”; 网址url =新网址（“https://fcm.googleapis.com/fcm/send”）; HttpURLConnection conn =（HttpURLConnection）url.openConnection（）; System.setProperty（ “javax.net.debug”， “全”）; conn.setDoOutput（真）; conn.setRequestMethod（ “POST”）; conn.setRequestProperty（“Content-Type”，“application / json”）; conn.setRequestProperty（“授权”，“key =”+ apiKey）;
```
    conn.setDoOutput(true);

    String input = "{\r\n\"to\":
```
\ “fdaxKOmRcAI：APA91bEXILacYEjypsbusKXHV_TuEzt_vsqhI5OxH - ****************** - l2qGIORSiE0W5B2d74yjXAz60l \”， \ r \ n \“通知\”：{\ r \ n \“title \”：\“title \”，\ r \ n \“body \”：\“ 单个vijay的主体\“\ r \ n} \ r \ n}”;
```
            OutputStream os = conn.getOutputStream();       os.write(input.getBytes());         os.flush();         os.close();

    int responseCode = conn.getResponseCode();
    System.out.println("\nSending 'POST' request to URL : " + url);
    System.out.println("Post parameters : " + input);
    System.out.println("Response Code : " + responseCode);

    BufferedReader in = new BufferedReader(new
```
的InputStreamReader（conn.getInputStream（）））; String inputLine; StringBuffer response = new StringBuffer（）;
```
    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);         }       in.close();

    // print result         System.out.println(response.toString());

}
```
}
1. 列表项

如何使用GCM从Java服务器向Android应用程序发送通知？

4 个答案: