我正在制作一个Android应用程序，它将数据作为来自服务器的通知，我已经使用过服务。此服务在后台运行，计时器为30秒。并且每隔30秒，该服务会检查并提取通知，但问题是移动设备的通知数量是实际通知数量的3倍。我不明白发生了什么。 这是我的服务类：
public class NotificationServices extends Service {
int iUniqueId = (int) (System.currentTimeMillis() & 0xfffffff);
private final int updateIntercal = 30 * 1000;
private Timer timer = new Timer();
private static final int notificationEx = 0;
private NotificationCompat.Builder mBuilder;
private PendingIntent resultPendingIntent;
int mNotificationId = 001;
private NotificationManager mNotifyMgr;
private Intent resultIntent;
private String messageRecipientId;
private int recipientID = 0;
int counter = 0;
//private boolean lock = false;
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// Let it continue running until it is stopped.
//Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
DatabaseHandler dh = new DatabaseHandler(NotificationServices.this);
try {
dh.Open();
recipientID = dh.getRecipientId();
dh.close();
} catch (SQLException e) {
e.printStackTrace();
}
timer.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
// Check if there are updates here and notify if true
Log.d("Service Counter", counter + "");
counter++;
RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
String url = getResources().getString(R.string.apiUrl) + "/registration/checkNotification/recipientID/" + recipientID;
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
Log.d("Response notification", response);
mNotifyMgr = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
JSONObject jsonObject = new JSONObject(response);
JSONArray jsonArray = jsonObject.getJSONArray("data");
for (int i = 0; i < jsonArray.length(); i++) {
mBuilder = new NotificationCompat.Builder(NotificationServices.this);
mBuilder.setAutoCancel(true);//removes notification from status bar once clicked on it
//Vibration
mBuilder.setVibrate(new long[]{500, 500, 500, 500, 500});
mBuilder.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION));
mBuilder.setLights(Color.RED, 3000, 3000);
mBuilder.setSmallIcon(R.drawable.notification_icon)
.setContentTitle(jsonArray.getJSONObject(i).getString("subject"))
.setContentText(jsonArray.getJSONObject(i).getString("messageBody"));
//Passing the category to MainActivity Using Bundle
Bundle bundle = new Bundle();
bundle.putInt("message_recipientID", jsonArray.getJSONObject(i).getInt("message_recipientID"));
bundle.putString("Category", jsonArray.getJSONObject(i).getString("category"));
bundle.putInt("studentId", jsonArray.getJSONObject(i).getInt("studentID"));
bundle.putString("Subject", jsonArray.getJSONObject(i).getString("subject"));
bundle.putString("Message", jsonArray.getJSONObject(i).getString("messageBody"));
bundle.putString("Date", jsonArray.getJSONObject(i).getString("dateScheduled"));
bundle.putBoolean("FromNotification", true);
//For action of notification, use PendingIntent
resultIntent = new Intent(NotificationServices.this, MainActivity.class);
resultIntent.putExtras(bundle);//passing the bundle in the resultIntent
resultIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
Log.d("BundleValues", bundle.getInt("studentId") + " " + bundle.getString("Message"));
resultPendingIntent = PendingIntent.getActivity(NotificationServices.this, mNotificationId, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
//Log.d("BundleValuesAfter", bundle.getInt("studentId")+" "+bundle.getString("Message"));
mNotifyMgr.notify(mNotificationId, mBuilder.build());//Sends the notification
mNotificationId++;
//messageRecipientId = jsonArray.getJSONObject(i).getString("message_recipientID");
//Getting the current date to send to the server
Calendar c = Calendar.getInstance();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String formattedDate = df.format(c.getTime());
Log.d("seedate", formattedDate);
//save the message into SQLite Database
DatabaseHandler dh = new DatabaseHandler(getApplicationContext());
dh.Open();
dh.saveNotification(jsonArray.getJSONObject(i).getInt("message_recipientID"),
jsonArray.getJSONObject(i).getInt("studentID"),
jsonArray.getJSONObject(i).getString("dateScheduled"),
jsonArray.getJSONObject(i).getString("messageBody"),
jsonArray.getJSONObject(i).getString("subject"),
jsonArray.getJSONObject(i).getString("category"));
dh.close();
/*//Setting message is recieved
RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
//String url = "http://hsm.edu.np/hsmapp/api/registration/notificationSeen/message_recipientID/"
String url = getResources().getString(R.string.apiUrl) + "/registration/notificationSeen/message_recipientID/"
+ messageRecipientId + "/date/" + formattedDate;
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d("Response", response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.d("Response", error.toString());
}
});
queue.add(stringRequest);*/
}
} catch (JSONException e1) {
e1.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
, new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error) {
Log.d("Response", "error" + error);
}
}
);
queue.add(stringRequest);
}
}
, 0, updateIntercal);
return START_STICKY;
}
private void stopService() {
if (timer != null) timer.cancel();
Log.d("Service Status:", "Stopped");
}
@Override
public void onDestroy() {
super.onDestroy();
if (timer != null) {
timer.cancel();
}
Toast.makeText(this, "Service Destroyed", Toast.LENGTH_LONG).show();
}
}
我已经在启动活动中启动了这项服务，如下所示：
startService(new Intent(SplashScreen.this, NotificationServices.class));
我最近正在学习这种方法，所以任何人都可以帮助我，我做错了什么？我不知道问题是什么？