我的Android自定义精灵类的问题

Question

我目前正在为Android for java设计一个基本精灵类，因为我不想使用2D引擎，Google也不会出于某种原因提供任何精灵API ...

无论如何，我的问题是关于我设计的课程。我有一个Sprite类，它采用位图并将其转换为＆＃34; sprite＆＃34;。然后，当用户创建一个新的＆＃34; SpriteContainer＆＃34;

时，可以将此精灵传递给我创建的自定义视图。

我的DynamicSpriteContainer代码如下：

package com.me.spriteGraphics;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class DynamicSpriteContainer extends SurfaceView implements SurfaceHolder.Callback {
    private SurfaceHolder holder;
    public int x, y;
    private Bitmap b;
    public Sprite sprite;
    private Canvas c = new Canvas();
    private boolean bool = false;

    public DynamicSpriteContainer(Context context, Sprite spriteImage) {
        //public ImageView(Context context) {
        super(context);

        //get sprite
        b = spriteImage.getBitmap();

        //set holder
        holder = getHolder();
        holder.addCallback(this);

        //set position
        x = y = 0;

        update();
    }

    public void surfaceCreated(SurfaceHolder holder) {
        c = holder.lockCanvas();
        c.drawARGB(255, 150, 150, 10);

        //set up bitmap image
        c.drawBitmap(b, x, y, null);
        holder.unlockCanvasAndPost(c);
        update();
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

    }

    public void surfaceDestroyed(SurfaceHolder holder) {

    }

    private void update() {
        //this code will alter the character in the way the developer specifies (per frame)
        Thread repeat = new Thread( new Runnable() {
            public void run() {
                try {
                    //move sprite in constant motion
                    while (bool) {
                        //redraw
                        c = holder.lockCanvas();
                        c.drawARGB(255, 150, 150, 10);

                        //set up bitmap image
                        c.drawBitmap(b, x, y, null);
                        holder.unlockCanvasAndPost(c);
                    }
                } catch (Error e) {
                    e.printStackTrace();
                    bool = false;
                }
            }
        });
        repeat.start();
    }

    public void setX(int x) {
        //notice how this same code above has the holder, the holder is recognized above, not here.
        c = holder.lockCanvas();
        c.drawARGB(255, 150, 150, 10);

        //set up bitmap image
        c.drawBitmap(b, x, y, null);
        holder.unlockCanvasAndPost(c);       
    }

    //set the info on pause, resume, stop...
    //this data is for error stopping, so the app can resume and stop without passing an error to the user!
    public void passInfo(boolean isPaused, boolean isResumed, boolean isStopped) {
        if (isPaused && sprite.auto) {
            bool = false;
        }

        if (isResumed && sprite.auto) {
            bool = true;
        }

        if (isStopped && sprite.auto) {
            bool = false;
        }
    }
}

对于长代码摘录感到抱歉。

主要问题是在update（）函数中，持有者被识别，但在setX（）中，它不是......

如何让setX（）识别持有者？

提前多谢你!!!