來自JSON的Android通知服務

Question

如何製作通知服務，通知用戶有關新消息的一些信息？

我從JSON API（https://newsapi.org/）向我的應用程序收到消息，並希望如果有任何他沒有看到的新故事可以顯示用戶通知。

Answer 1

是很容易使用火力services.Follow這裏我腳步的Android創建推送通知：

https://firebase.google.com/docs/notifications/android/console-audience去這裏創建火力控制檯您的第一個項目。

，你會得到一個文件下載並粘貼到您的應用程序模塊中，並執行由站點

創建您的project.copy這些文件並粘貼1 https://github.com/firebase/quickstart-android/blob/master/messaging/app/src/main/java/com/google/firebase/quickstart/fcm/MyFirebaseInstanceIDService.java
2. https://github.com/firebase/quickstart-android/blob/master/messaging/app/src/main/java/com/google/firebase/quickstart/fcm/MyFirebaseMessagingService.java

添加必要的權限和gradle這個提供的說明插件。

在Activity類中調用String token = FirebaseInstanceId.getInstance().getToken();。

要通過這個網站給需要的參數測試：http://apns-gcm.bryantan.info/

Answer 2

看我的代碼 那公測.. `公共類通知服務擴展{ 字符串datanews; String titlenotif; String destnotif; MyAsynk asynk;

@Override 
public void onCreate() { 
    super.onCreate(); 
    Timer timer = new Timer(); 
    timer.schedule(new UpdateTimeTask(), 0, 1800000); //тикаем каждые 30 мinute без задержки 1800000 

} 
//задача для таймера 
//Проверяем на новую запись. 
class UpdateTimeTask extends TimerTask { 
    public void run() { 
     asynk = new MyAsynk(); 
     asynk.execute(); 
     createNotification(getApplicationContext());//пушим уведомление 
    } 
} 
class MyAsynk extends AsyncTask<Void,Void,StringBuilder> { 
    @Override 
    //работа в бекграунде 
    protected StringBuilder doInBackground(Void... voids) { 
     StringBuilder stringBuilder = new StringBuilder(); 
     String key = "YOUR_KEY"; 
     try { 
      URL url = new URL("YOUR_URL_HERE" + key); 
      URLConnection uc = url.openConnection(); 
      uc.connect(); 
      BufferedInputStream in = new BufferedInputStream(uc.getInputStream()); 
      int ch; 
      while ((ch = in.read()) != -1) { 
       stringBuilder.append((char) ch); 
      } 
     } catch (Exception e) { 
     } 
     return stringBuilder; 
    } 
    @Override 
    protected void onPostExecute(StringBuilder stringBuilder) { 

     try { 
      JSONObject jsonObject = new JSONObject(stringBuilder.toString()); 
      JSONArray array = jsonObject.getJSONArray("articles"); 
      for (int i = 0; i < array.length(); i++) { 
       JSONObject object = array.getJSONObject(i); 
       String title = object.getString("title"); 
       String desc = object.getString("description"); 
       String newsdata = object.getString("publishedAt"); 
       datanews = newsdata; 
       titlenotif = title; 
       destnotif = desc; 
      } 
     } 
     catch (Exception e){ 
     } 
    } 
} 
private void createNotification(Context context) { 
    NotificationManager manager = (NotificationManager) context.getSystemService(NOTIFICATION_SERVICE); 
    NotificationCompat.Builder ncBuilder = new NotificationCompat.Builder(context); 
    Intent intent = new Intent(this, MainActivity.class); 
    PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent, 0); 
    ncBuilder.setVibrate(new long[]{500}); 
    ncBuilder.setLights(Color.WHITE, 3000, 3000); 
    ncBuilder.setSound(Settings.System.DEFAULT_NOTIFICATION_URI); 
    ncBuilder.setContentIntent(pIntent); 
    ncBuilder.setContentTitle(titlenotif + ""); 
    ncBuilder.setContentText(destnotif + ""); 
    ncBuilder.setTicker("You have news!"); 
    ncBuilder.setSmallIcon(R.drawable.news_icon); 
    ncBuilder.setAutoCancel(true); 

    manager.notify((int)System.currentTimeMillis(),ncBuilder.build()); 
} 
public IBinder onBind(Intent arg0) { 
    return null; 
} 

}`