小编mic*_*ima的帖子

我正在为一个设备编写一个控件类,直到我需要将ARGB颜色转换为其格式.起初,我写了这个函数(有效):

private static int convertFormat(System.Drawing.Color c)
{
    String all;

    int a = (int)((float)c.A / 31.875);

    if (a == 0)
        a = 1;

    all = a.ToString() + c.B.ToString("X").PadLeft(2, '0') + c.G.ToString("X").PadLeft(2, '0') + c.R.ToString("X").PadLeft(2, '0');

    int num = int.Parse(all, System.Globalization.NumberStyles.AllowHexSpecifier);

    return num;
}

但它太丑了我想写一个更优雅的解决方案.所以我做了一些以获得正确的值,尝试0到50之间的所有组合.它工作,我最终得到了这个:

private static int convertFormatShifting(System.Drawing.Color c)
{
    int alpha = (int)Math.Round((float)c.A / 31.875);

    int a = Math.Max(alpha,1);

    return (a << 24) | (c.B << 48) | (c.G << 40) | (c.R << 32);
}

有效!

但是现在,我希望有人能够解释为什么这些是正确的变化值.

我不确定我做错了什么,通知是我喜欢它的方式,但我不能让它让手表振动,它显示为最小化.我想要实现的效果应该看起来像环聊通知,它会振动并全屏显示.这是我正在使用的代码(在手表上):

Intent actionIntent = new Intent(this, ConvActivity.class);
            actionIntent.putExtra("num",num);
            PendingIntent actionPendingIntent =
                    PendingIntent.getActivity(this, 0, actionIntent,
                            PendingIntent.FLAG_UPDATE_CURRENT);

// Create the action
                NotificationCompat.Action action =
                        new NotificationCompat.Action.Builder(R.drawable.ic_launcher,"Reply"
                                , actionPendingIntent)
                                .build();
            NotificationCompat.BigTextStyle bigStyle = new NotificationCompat.BigTextStyle();
            bigStyle.bigText(body).setBigContentTitle(name);


            NotificationCompat.Builder notificationBuilder =
                    new NotificationCompat.Builder(this)
                            .setSmallIcon(R.drawable.ic_launcher)
                            .setContentTitle(name)
                            .setContentText(body)
                                    //.setContentIntent(viewPendingIntent)
                                    //.addAction(R.drawable.ic_map,
                                    //        getString(R.string.map), mapPendingIntent)
                            .setStyle(bigStyle).setAutoCancel(true)
                    .addAction(R.drawable.ic_launcher,"Reply"
                            , actionPendingIntent);

            if(pic != null)
                notificationBuilder.setLargeIcon(BitmapFactory.decodeByteArray(pic,0,pic.length));
                            //.extend(new NotificationCompat.WearableExtender().addAction(action))                ;




            // Get an instance of the NotificationManager service
            NotificationManagerCompat notificationManager =
                    NotificationManagerCompat.from(this);

// Issue the notification with notification manager.
                notificationManager.notify(0, notificationBuilder.build());