Question

我想在不取消/删除我应用的先前通知的情况下创建通知。以下是我创建通知的代码：

private void notification(Context context, String title, String content) {
    NotificationCompat.Builder mBuilder =
            new NotificationCompat.Builder(context)
            .setSmallIcon(R.drawable.notification_icon)
            .setContentTitle(title)
            .setContentText(content);

    Intent resultIntent = new Intent(context, MainActivity.class);
    TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
    // Adds the back stack for the Intent (but not the Intent itself)
    stackBuilder.addParentStack(MainActivity.class);
    // Adds the Intent that starts the Activity to the top of the stack
    stackBuilder.addNextIntent(resultIntent);
    PendingIntent resultPendingIntent =
            stackBuilder.getPendingIntent(
                0,
                PendingIntent.FLAG_UPDATE_CURRENT
            );
    mBuilder.setContentIntent(resultPendingIntent);
    NotificationManager mNotificationManager =
        (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    //Id allows you to update the notification later on.
    mNotificationManager.notify(100, mBuilder.build());
}

Answer 1

您正在使用硬编码的ID进行通知，当然它会替换旧的ID。尝试使用变量ID而不是硬编码的100。

mNotificationManager.notify(100+x, mBuilder.build());

或类似的东西。

Answer 2

使用变量ID 进行通知，我在 1小时前遇到了此问题并且使用此技术来克服此问题。

        val id= Random(System.currentTimeMillis()).nextInt(1000)
        mNotificationManager?.notify(id, mBuilder.build())

Answer 3

对于长期解决方案，您可以使用随机方法为您生成整数变量，然后在notify中调用它。

mNotificationManager.notify(createRandomCode(7), mBuilder.build());

public int createRandomCode(int codeLength) {
        char[] chars = "1234567890".toCharArray();
        StringBuilder sb = new StringBuilder();
        Random random = new SecureRandom();
        for (int i = 0; i < codeLength; i++) {
            char c = chars[random.nextInt(chars.length)];
            sb.append(c);
        }
        return Integer.parseInt(sb.toString());
    }

Answer 4

在创建 PendingIntent 对象时，我们调用 PendingIntent.getActivity(mContext, requestCode, intent, PendingIntent.FLAG_UPDATE_CURRENT);

所以这里使用下面的代码来生成 PendingIntent

Random objRandom = new Random();
    final PendingIntent resultPendingIntent =
            PendingIntent.getActivity(
                    mContext,
                    objRandom.nextInt(100),
                    intent,
                    PendingIntent.FLAG_UPDATE_CURRENT
            );

Android：创建新通知后，将替换旧通知

4 个答案: