使用通知 ID 更改徽标和文本

Question

我想知道 Facebook 等应用程序如何根据内容更改通知标题和徽标。

例如，在 Facebook 中，如果您被标记，您将获得另一个标题和另一个徽标。

我认为通过 notify 应该可以创建一个唯一的通知。 虽然我找不到任何明确的例子。

我的生成通知：

private static void generateNotification(Context context, String message, String url) {
    int icon = R.drawable.ic_launcher;

    long when = System.currentTimeMillis();
    NotificationManager notificationManager = (NotificationManager)
    context.getSystemService(Context.NOTIFICATION_SERVICE);
    Notification notification = new Notification(icon, message, when);

    String title = context.getString(R.string.app_name);

    Intent notificationIntent = new Intent(context, ShowChange.class);
    notificationIntent.putExtra ("url",url);
    // set intent so it does not start a new activity
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
            Intent.FLAG_ACTIVITY_SINGLE_TOP);
    PendingIntent intent =
            PendingIntent.getActivity(context, 0, notificationIntent, 0);
    notification.setLatestEventInfo(context, title, message, intent);
    notification.flags |= Notification.FLAG_AUTO_CANCEL;

    // Play default notification sound
    notification.defaults |= Notification.DEFAULT_SOUND;

    //notification.sound = Uri.parse("android.resource://" + context.getPackageName() + "your_sound_file_name.mp3");

    // Vibrate if vibrate is enabled
    notification.defaults |= Notification.DEFAULT_VIBRATE;
    notificationManager.notify(0, notification);       
}

Answer 1

应该是这样的：（这基本上是你的代码，经过一些修改）

public static void generateNotification(Context context, String message, String url,int icon_from_drawable) { int icon = icon_from_drawable;

long when = System.currentTimeMillis();
NotificationManager notificationManager = (NotificationManager)
context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(icon, message, when);

String title = context.getString(R.string.app_name);

Intent notificationIntent = new Intent(context, ShowChange.class);
notificationIntent.putExtra ("url",url);
// set intent so it does not start a new activity
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
        Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent intent =
        PendingIntent.getActivity(context, 0, notificationIntent, 0);
notification.setLatestEventInfo(context, title, message, intent);
notification.flags |= Notification.FLAG_AUTO_CANCEL;

// Play default notification sound
notification.defaults |= Notification.DEFAULT_SOUND;

//notification.sound = Uri.parse("android.resource://" + context.getPackageName() + "your_sound_file_name.mp3");

// Vibrate if vibrate is enabled
notification.defaults |= Notification.DEFAULT_VIBRATE;
notificationManager.notify(0, notification);      

}

如果您将应用程序定位为 API LEVEL>=11，则使用 Notification.Builder 参考这里：http://developer.android.com/reference/android/app/Notification.Builder.html 还有一点，上面的代码会不断更新同一个通知对象，因为通知管理器的 notify 方法总是采用相同的 id 即 0，所以会更新同一个通知对象。