import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.PowerManager;
import android.support.v4.app.NotificationCompat;

import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;

import java.util.Date;
import java.util.Map;

public class CustomFirebaseMessagingService extends FirebaseMessagingService {

    /**
     * Called when message is received.
     *
     * @param remoteMessage Object representing the message received from Firebase Cloud Messaging.
     */
    // [START receive_message]
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        Map<String, String> pushDataMap = remoteMessage.getData();
        sendNotification(pushDataMap);
    }

    private void sendNotification(Map<String, String> dataMap) {
        Intent intent = new Intent(this, MachineListActivity.class); 
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT);
        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

        NotificationCompat.Builder nBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle(dataMap.get("title"))
                .setContentText(dataMap.get("msg"))
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setVibrate(new long[]{1000, 1000})
                .setLights(Color.WHITE,1500,1500)
                .setContentIntent(contentIntent);

        NotificationManager nManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        nManager.notify(0 /* ID of notification */, nBuilder.build());
    }

import com.google.firebase.iid.FirebaseInstanceId;
import com.google.firebase.iid.FirebaseInstanceIdService;

public class CustomFirebaseInstanceIdService extends FirebaseInstanceIdService {

    /**
     * Called if InstanceID token is updated. This may occur if the security of
     * the previous token had been compromised. Note that this is called when the InstanceID token
     * is initially generated so this is where you would retrieve the token.
     */
    // [START refresh_token]
    @Override
    public void onTokenRefresh() {
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();
        sendRegistrationToServer(refreshedToken);
    }
    // [END refresh_token]


    /**
     * Persist token to third-party servers.
     *
     * Modify this method to associate the user's FCM InstanceID token with any server-side account
     * maintained by your application.
     *
     * @param token The new token.
     */
    private void sendRegistrationToServer(String token) {
		//FCM 토큰 갱신
    }
}

private boolean isCanReceivePush(String pushMsg) {
	//시간 체크 로직
}

@Override
    public void onTokenRefresh() {
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();

        if (isValidString(refreshedToken)) { //토큰이 널이거나 빈 문자열이 아닌 경우
            if (!isValidString(getSharedPreferencesStringData(getApplicationContext(), AD_FCM_TOKEN))) { //토큰에 데이터가 없는 경우에만 저장
                setSharedPreferencesStringData(getApplicationContext(), AD_FCM_TOKEN, refreshedToken);
            }

            if (isValidString(getSharedPreferencesStringData(getApplicationContext(), AD_LOGIN_ID))) { //로그인 상태일 경우에는 서버로 보낸다.
                if (!refreshedToken.equals(getSharedPreferencesStringData(getApplicationContext(), AD_FCM_TOKEN))) { //기존에 저장된 토큰과 비교하여 다를 경우에만 서버 업데이트
                    setSharedPreferencesStringData(getApplicationContext(), AD_FCM_TOKEN, refreshedToken);
                    sendRegistrationToServer(refreshedToken);
                }
            }
        }
    }