生成int唯一id作为android通知id
生成int唯一id作为android通知id
提问于 2014-09-08 01:53:21
当我发送多个推送通知时，我需要它们都显示在按发送时间排序的通知栏中。我知道我应该使用独特的通知-我试图生成随机数，但这并没有解决我的问题，因为我需要他们排序。我尝试使用AtomicInt，但仍然没有得到想要的结果。
package com.mypackage.lebadagency;
import java.util.concurrent.atomic.AtomicInteger;
import android.app.IntentService;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.os.SystemClock;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import android.widget.RemoteViews;
import com.google.android.gms.gcm.GoogleCloudMessaging;
public class GCMNotificationIntentService extends IntentService {
private AtomicInteger c = new AtomicInteger(0);
public int NOTIFICATION_ID = c.incrementAndGet();
private NotificationManager mNotificationManager;
NotificationCompat.Builder builder;
public GCMNotificationIntentService() {
super("GcmIntentService");
}
public static final String TAG = "GCMNotificationIntentService";
@Override
protected void onHandleIntent(Intent intent) {
Bundle extras = intent.getExtras();
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
String messageType = gcm.getMessageType(intent);
if (!extras.isEmpty()) {
if (GoogleCloudMessaging.MESSAGE_TYPE_SEND_ERROR
.equals(messageType)) {
sendNotification("Send error: " + extras.toString());
} else if (GoogleCloudMessaging.MESSAGE_TYPE_DELETED
.equals(messageType)) {
sendNotification("Deleted messages on server: "
+ extras.toString());
} else if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE
.equals(messageType)) {
for (int i = 0; i < 3; i++) {
Log.i(TAG,
"Working... " + (i + 1) + "/5 @ "
+ SystemClock.elapsedRealtime());
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
}
}
Log.i(TAG, "Completed work @ " + SystemClock.elapsedRealtime());
sendNotification(""
+ extras.get(Config.MESSAGE_KEY));
Log.i(TAG, "Received: " + extras.toString());
}
}
GcmBroadcastReceiver.completeWakefulIntent(intent);
}
private void sendNotification(String msg) {
Log.d(TAG, "Preparing to send notification...: " + msg);
mNotificationManager = (NotificationManager) this
.getSystemService(Context.NOTIFICATION_SERVICE);
//here start
Intent gcmintent = new Intent(this, AppGcmStation.class);
gcmintent.putExtra("ntitle", msg);
gcmintent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
int requestID = (int) System.currentTimeMillis();
//here end
PendingIntent contentIntent = PendingIntent.getActivity(this, requestID,
gcmintent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
this).setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("my title")
.setStyle(new NotificationCompat.BigTextStyle().bigText(msg))
.setContentText(msg);
mBuilder.setAutoCancel(true);
mBuilder.setTicker(msg);
mBuilder.setVibrate(new long[] { 1000, 1000, 1000, 1000, 1000 });
mBuilder.setLights(Color.RED, 3000, 3000);
mBuilder.setContentIntent(contentIntent);
mBuilder.setDefaults(Notification.DEFAULT_SOUND);
mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
Log.d(TAG, "Notification sent successfully.");
}
}我需要最好和最简单的方法来生成一个递增的int id，以将其指定为通知id。
回答 5
Stack Overflow用户
回答已采纳
发布于 2014-09-08 02:03:36
您对所有通知都使用相同的通知ID (值始终为1)。您可能应该将通知ID分离到一个单独的单例类中：
public class NotificationID {
private final static AtomicInteger c = new AtomicInteger(0);
public static int getID() {
return c.incrementAndGet();
}
}然后在代码中使用NotificationID.getID()而不是NOTIFICATION_ID。
编辑:正如@racs在评论中指出的那样，如果你的应用程序进程碰巧被杀死，上述方法不足以确保正确的行为。至少，AtomicInteger的初始值应该从某个活动的保存状态初始化，而不是从0开始。如果通知If在应用程序重新启动时需要是唯一的(同样，应用程序进程可能会被终止)，那么最新的值应该在每次递增后保存在某个地方(可能保存到共享的前缀中)，并在应用程序启动时恢复。
Stack Overflow用户
发布于 2016-08-29 20:01:13
对于还在四处张望的人来说。我生成了一个时间戳，并将其用作id。
import java.util.Date;
import java.util.Locale;
public int createID(){
Date now = new Date();
int id = Integer.parseInt(new SimpleDateFormat("ddHHmmss", Locale.US).format(now));
return id;
}像这样使用它
int id = createID();
mNotifyManager.notify(id, mBuilder.build());Stack Overflow用户
发布于 2016-12-13 21:31:49
private static final String PREFERENCE_LAST_NOTIF_ID = "PREFERENCE_LAST_NOTIF_ID";
private static int getNextNotifId(Context context) {
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
int id = sharedPreferences.getInt(PREFERENCE_LAST_NOTIF_ID, 0) + 1;
if (id == Integer.MAX_VALUE) { id = 0; } // isn't this over kill ??? hahaha!! ^_^
sharedPreferences.edit().putInt(PREFERENCE_LAST_NOTIF_ID, id).apply();
return id;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/25713157
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