我正在开发一种基于纸牌的游戏，在该游戏中，用户可以从其卡组中选择一张或多张卡，然后将其替换为其他卡组的卡。我正在使用onTouchEvent检测用户是否选择了任何位图，并将该位图替换为其他卡座的位图。但是OnTouchEvent只允许我一次选择一个位图。如何从卡座中选择多个位图？我也想知道是否有比我使用的更好的方法来交换位图。
线程类：
class MySurfaceViewThread:BaseThread
{
private MySurfaceView mysurfaceview;
private ISurfaceHolder myThreadSurfaceHolder;
bool running;
public MySurfaceViewThread(ISurfaceHolder paramSurfaceHolder, MySurfaceView paramSurfaceView)
{
mysurfaceview = paramSurfaceView;
myThreadSurfaceHolder = paramSurfaceHolder;
}
public override void RunThread()
{
Canvas c;
while (running)
{
c = null;
try
{
c = myThreadSurfaceHolder.LockCanvas(null);
mysurfaceview.Render(c);
// mysurfaceview.PostInvalidate();
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.ToString());
}
finally
{
if (c != null)
{
myThreadSurfaceHolder.UnlockCanvasAndPost(c);
}
// running = false;
}
}
}
public override void SetRunning(bool paramBoolean)
{
running = paramBoolean;
}
}
OnTouchEvent：
public override bool OnTouchEvent(MotionEvent e)
{
Log.Debug(Tag, "Inside" + System.Reflection.MethodBase.GetCurrentMethod().Name + "Method");
float lasttouched_X, lasttouched_Y;
Cards localcard;
int index=-1;
//switch (e.Action) {
// case MotionEventActions.Up: Log.Info(Tag, "Up Event is Triggered");
// break;
// case MotionEventActions.Move: Log.Info(Tag, "Move Event is Triggered");
// break;
// case MotionEventActions.Down: Log.Info(Tag, "Down Event is triggered");
// break;
//}
MotionEventActions action = e.Action;
if (e.Action == MotionEventActions.Down || e.Action== MotionEventActions.Move)
{
Log.Info(Tag, "Down Event is triggered");
lasttouched_X = e.GetX();
lasttouched_Y = e.GetY();
if (TouchedCard == null)
{
index = CardTouched((int)lasttouched_X, (int)lasttouched_Y);
TouchedCard = MainPlayer.getCard(index);
cardindex = index;
}
else
{
if (TouchedCard != null && ((lasttouched_X >= DiscardDeck_CurrentX && lasttouched_X < (DiscardDeck_CurrentX + DiscardedDeck.getCard().Image.Width)) && (lasttouched_Y >= DiscardDeck_CurrentY && lasttouched_Y < (DiscardDeck_CurrentY + DiscardedDeck.getCard().Image.Width))))
{
ReplacedCard = DiscardedDeck.getCard();
}
if (ReplacedCard != null)
SwapCards(ReplacedCard, MainPlayer, cardindex);
}
}
return true;
}
private void SwapCards(Cards replacedCard, Deck mainPlayer, int index)
{
Cards temp = mainPlayer.getCard(index);
mainPlayer.SetCurrentCard(replacedCard, index);
DiscardedDeck.SetCurrentCard(temp, DiscardedDeck.CardsLeft()-1);
TouchedCard = null;
cardindex = -1;
}
private int CardTouched(int lasttouched_X, int lasttouched_Y)
{
int index = 0;
Cards localcard = null;
while (index < MainPlayer.CardsLeft())
{
localcard = MainPlayer.getCard(index);
if (lasttouched_X >= localcard.current_X && lasttouched_X < (localcard.current_X + localcard.Image.Width) && (lasttouched_Y>=localcard.current_Y && lasttouched_Y<(localcard.current_Y+localcard.Image.Width)))
return index;
index++;
}
return -1;
}