背景比其他任何东西都移动得更远更快

Question

好的，我正在为我的背景绘制一个位图。每当玩家移动它时，移动敌人阵列1 px并且它应该为背景做同样的事情。但每当我移动时，背景比游戏中的其他任何东西都要快得多。任何人都可以告诉我这是什么造成的？继承人的代码。移动所有内容的代码位于设置方向方法的底部。

package com.gametest;

import java.util.concurrent.CopyOnWriteArrayList;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnTouchListener;

public class GameSurfaceView extends Activity implements OnTouchListener {

    double ran;
    int touchX, touchY, screenWidth, screenHeight, objX, objY;
    static int bgx, bgy, bgW, bgH, enemyCount, score, playerHealth;
    static boolean canUpdate;
    static MyView v;
    static Bitmap orb, orb2, explosion, bg;
    static CopyOnWriteArrayList<Sprite> copy = new CopyOnWriteArrayList<Sprite>();
    static String hpString;
    static Player player;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        v = new MyView(this);
        v.setOnTouchListener(new OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent me) {
                switch (me.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    return true;
                case MotionEvent.ACTION_MOVE:
                    return true;
                case MotionEvent.ACTION_UP:
                    touchX = (int) me.getX();
                    touchY = (int) me.getY();
                    for (Sprite sprite : copy) {
                        sprite.checkTouch(touchX, touchY);
                        return true;
                    }
                }
            return true;
            }
        });

        canUpdate = true;
        screenWidth = v.getWidth();
        screenHeight = v.getHeight();
        playerHealth = 250;
        hpString = "Health " + playerHealth;
        ran = 0;
        score = 0;
        orb = BitmapFactory.decodeResource(getResources(), R.drawable.blue_orb);
        orb2 = BitmapFactory.decodeResource(getResources(), R.drawable.red_orb);
        bg = BitmapFactory.decodeResource(getResources(), R.drawable.bg1);
        bgx = bg.getHeight()/2;
        bgy = bg.getHeight()/2;
        bgH = bg.getHeight();
        bgW = bg.getWidth();
        explosion = BitmapFactory.decodeResource(getResources(), R.drawable.explosion);
        player = new Player(v, orb2, explosion, screenWidth, screenHeight);
        createEnemies();
        setContentView(v);

    }

    private void createEnemies() {
        if (enemyCount < 5) {
            screenWidth = v.getWidth();
            screenHeight = v.getHeight();
            copy.add(new Sprite(v, orb, explosion, screenWidth, screenHeight, copy.size()));
            enemyCount++;
        }
    }

    public static void checkECount(int id) {
        canUpdate = false;
        copy.remove(id);
        enemyCount--;
        CopyOnWriteArrayList<Sprite> c = new CopyOnWriteArrayList<Sprite>();
        int index = 0;
        for (Sprite s : copy) {
            s.ID = index;
            c.add(s);
            index++;
        }
        score = score + 10;
        copy = c;
        canUpdate = true;
    }

    @Override
    protected void onPause() {
        super.onPause();
        v.pause();
    }

    @Override
    protected void onResume() {
        super.onResume();
        v.resume();
    }

    public class MyView extends SurfaceView implements Runnable {

        Thread t = null;
        SurfaceHolder holder;
        boolean isItOk = false;

        public MyView(Context context) {
            super(context);
            holder = getHolder();

        }

        @Override
        public void run() {
            while (isItOk == true) {
                if (!holder.getSurface().isValid()) {
                    continue;
                }
                Canvas c = holder.lockCanvas();
                if (canUpdate) {
                    canvas_draw(c);
                }
                holder.unlockCanvasAndPost(c);
                try {
                    t.sleep(50);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

            }

        }

        protected void canvas_draw(Canvas canvas) {
            canvas.drawColor(Color.BLACK);
            Rect bgRec = new Rect(bgx, bgy, bgx+bgW, bgy+bgH);
            canvas.drawBitmap(bg, null, bgRec, null);
            ran = Math.random() * 5;
            if (ran > 4.5) {
                createEnemies();
            }
            Paint paint = new Paint();
            paint.setColor(Color.BLACK);
            paint.setTextSize(15);
            canvas.drawText(hpString, 10, 25, paint);
            for (Sprite sprite : copy) {
                sprite.sprite_draw(canvas);
            }
            Player.sprite_draw(canvas, copy);

        }

        public void pause() {
            isItOk = false;
            while (true) {
                try {
                    t.join();
                } catch (InterruptedException e) {

                }
                break;
            }
            t = null;
        }

        public void resume() {
            isItOk = true;
            t = new Thread(this);
            t.start();
        }

    }

    @Override
    public boolean onTouch(View arg0, MotionEvent arg1) {
        return false;
    }

    public static void damagePlayer() {
        hpString = "Health " + playerHealth;
        playerHealth = playerHealth - 5;
        if (playerHealth < 0) {
            hpString = "game over";
        }
    }

    public static void setDirection(int i, int j) {
        if (i == 0 && j == -1) {
            for (Sprite s : copy) {
                s.y++;
                bgy++;
            }
        }
        if (i == 0 && j == 1) {
            for (Sprite s : copy) {
                s.y--;
                bgy--;
            }
        }
        if (i == -1 && j == 0) {
            for (Sprite s : copy) {
                s.x++;
                bgx++;
            }
        }
        if (i == 1 && j == 0) {
            for (Sprite s : copy) {
                s.x--;
                bgx--;
            }
        }

    }

}

Answer 1

您正在根据copy Iterable中的精灵数量更改bgx。在你的setDirection方法中，请将bgy，bgx移到增强的for循环之外，如：

if (i == 0 && j == -1) {
    for (Sprite s : copy) {
        s.y++;
    }
    bgy++;
}