android - 如何删除通知操作

Question

我有一个创建/更新通知的方法:

private void createNotification(Boolean removeAction) {
        getButtonPendingIntent().cancel();

        NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.ic_launcher)
                .setContentTitle("My App")
                .setOngoing(true)
                .setPriority(NotificationCompat.PRIORITY_MAX);

        NotificationCompat.BigTextStyle bigTextStyle = new NotificationCompat.BigTextStyle();
        bigTextStyle.setBigContentTitle("My App");

        if (removeAction) {
            String msg = "Some message";
            bigTextStyle.bigText(msg);
            builder.setContentText(msg);
            // this will remove button but leaves an empty space where the button existed
            builder.addAction(0, null, null);
        } else {
            String msg = "You are logged in. Slide down to logout.";
            bigTextStyle.bigText(msg);
            builder.setContentText(msg);
            builder.addAction(R.drawable.some_icon, "My Button", getButtonPendingIntent());
        }

        builder.setStyle(bigTextStyle);

        // Creates an explicit intent for an Activity in your app
        Intent resultIntent = new Intent(this, ResultActivity.class);
        TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
        stackBuilder.addParentStack(ResultActivity.class);
        stackBuilder.addNextIntent(resultIntent);
        PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
        builder.setContentIntent(resultPendingIntent);
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(100, builder.build());
    }

有时我需要删除我在通知中创建的操作。如果我只是创建一个新构建并通知一个没有操作的新事件，操作按钮仍然存在。

我在这段代码中添加:

builder.addAction(0, null, null);

这会删除操作按钮，但在通知屏幕中仍然会在该按钮所在的位置留下空白区域。是否有“正确”的方法从通知中删除操作及其使用的空间？

Answer 1

自上次回答以来已经花费了很多时间。但我认为对某些人来说它可能有用。在 NotificationCompat.Builder 中有一个 ArrayList - mActions。我通过调用 myNotificationBuilder.mActions.clear() 清除了这个 Arraylist。它帮助我从通知中删除操作按钮而无需重新创建它。