やあみんな私は一種の初心者なので、私と一緒に一生懸命にしないでください。私は Android 用の 2D ゲームに取り組んでいますが、問題があります。もうすぐ完成ですが、ゲームで収集可能なコインが必要で、障害物の上にランダムにスポーンするようにします。コインのメイン コードは既に完成しています。コインは障害物の上に浮かんでいて、収集できますが、コインをランダムに出現させる方法がわかりません。私のコードは次のとおりです。私のコインクラス：
enter code herepublic class Coin extends GameObject{
private Bitmap spritesheet;
private double dya;
private boolean playing;
private long startTime;
private Animation animation = new Animation();
private int num = 0;
private Obsticals obsticals;
public Coin(Bitmap res, int w, int h, int numFrames) {
x = GamePanel.WIDTH + 20;
y = GamePanel.HEIGHT - GamePanel.HEIGHT / 4 - 200;
dy = 0;
dx = +GamePanel.MOVESPEED;
height = h;
width = w;
Bitmap[] image = new Bitmap[numFrames];
spritesheet = res;
for (int i = 0; i < image.length; i++)
{
image[i] = Bitmap.createBitmap(spritesheet, i*width, 0, width, height);
}
animation.setFrames(image);
animation.setDelay(100);
}
public void update()
{
if (y <= 50) {
resetO();
}
x += dx;
long elapsed = (System.nanoTime() - startTime) / 1000000;
if (elapsed > 10000) {
dx = dx - 1;
startTime = System.nanoTime();
System.out.println(dx);
num = num + 30;
}
if (dx <= -25) {
dx = -24;
}
if (num >= 200) {
num = 200;
}
}
public void draw(Canvas canvas)
{
canvas.drawBitmap(animation.getImage(),x,y,null);
}
public void resetO(){
x = GamePanel.WIDTH + 20;
y = GamePanel.HEIGHT - GamePanel.HEIGHT / 4 - 200;
dy = 0;
dx = +GamePanel.MOVESPEED;
num = 0;
}
public void coinCollected(){
resetO();
}
}
ここに私のゲームパネルコードがあります:
public class GamePanel extends SurfaceView implement SurfaceHolder.Callback {
public static final int WIDTH = 856;
public static final int HEIGHT = 480;
public static int MOVESPEED = -15;
//other classes
private MainThread thread;
private background bg;
private busch busch;
private Ground ground;
private Player player;
private Obsticals obsticals;
private sun sun;
private Coin coin;
private CoinSymbol coinSymbol;
private Random rand = new Random();
public boolean sliden = false;
private int coinCounter = 0;
//SharedPreferences for coins
SharedPreferences coinprefs;
SharedPreferences.Editor coinprefsEditor;
// SharedPreferences for highscore
SharedPreferences prefs;
SharedPreferences.Editor prefsEditor;
int highscore;
int Highstring;
final String KEY1 = "key1";
public enum STATE{
MENU,
INGAME,
GAMEOVER;
};
private STATE State = STATE.MENU;
public GamePanel(Context context) {
super(context);
//add the callback to the surfaceholder to intercept events
getHolder().addCallback(this);
coinprefs = context.getSharedPreferences("Coinprefsdatei", Context.MODE_PRIVATE);
coinprefsEditor = coinprefs.edit();
prefs = context.getSharedPreferences("prefsdatei", Context.MODE_PRIVATE);
prefsEditor = prefs.edit();
thread = new MainThread(getHolder(), this);
//make gamePanel focusable so it can handle events
setFocusable(true);
}
public void GameOver(){
State = STATE.GAMEOVER;
}
public void newgame(){
MOVESPEED = -15;
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
boolean retry = true;
while (retry) {
try {
thread.setRunning(false);
thread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
retry = false;
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
//checkt highscore
loadScore();
loadCoins();
//malt alle bilder
sun = new sun(BitmapFactory.decodeResource(getResources(), R.drawable.sonne));
bg = new background(BitmapFactory.decodeResource(getResources(), R.drawable.baum));
busch = new busch(BitmapFactory.decodeResource(getResources(), R.drawable.applandschaft));
ground = new Ground(BitmapFactory.decodeResource(getResources(), R.drawable.weg));
coinSymbol = new CoinSymbol(BitmapFactory.decodeResource(getResources(), R.drawable.coinsymbol));
//Breite, Höhe, Frames
player = new Player(BitmapFactory.decodeResource(getResources(), R.drawable.test), 115, 120, 8);
obsticals = new Obsticals(BitmapFactory.decodeResource(getResources(), R.drawable.hindernisnew), 75, 150, 1);
coin = new Coin(BitmapFactory.decodeResource(getResources(), R.drawable.coin), 40, 40, 4);
//we can safely start the game loop
thread.setRunning(true);
thread.start();
}
public void saveHighscore(){
highscore = player.getScore();
prefsEditor.putInt(KEY1,highscore);
prefsEditor.commit();
}
public void loadScore(){
Highstring = prefs.getInt(KEY1,0);
}
public void loadCoins() { coinCounter = coinprefs.getInt(KEY1,0); }
public void saveCoins() {
coinprefsEditor.putInt(KEY1,coinCounter);
coinprefsEditor.commit();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if(event.getAction()==MotionEvent.ACTION_DOWN){
if(State == STATE.MENU){
State = STATE.INGAME;
}
if(!player.getPlaying() && State == STATE.INGAME)
{
player.setPlaying(true);
}
else if (State == STATE.INGAME)
{
player.setUp(true);
}
else if (State == STATE.GAMEOVER)
{
player.resetScore();
player.resetP();
player.setPlaying(true);
State = STATE.INGAME;
obsticals.resetO();
coin.resetO();
//newgame();
}
return true;
}
if(event.getAction()==MotionEvent.ACTION_UP)
{
player.setUp(false);
return true;
}
return super.onTouchEvent(event);
}
public void update() {
if (player.getPlaying() == true && State == STATE.INGAME) {
bg.update();
busch.update();
player.update();
ground.update();
obsticals.update();
coin.update();
collisionboolen(player, obsticals);
collectCoin(player, coin);
}
}
public boolean collisionboolen(GameObject player, GameObject obsticals)
{
if(Rect.intersects(player.getRectangle(),obsticals.getRectangle()))
{
checkScore();
saveCoins();
State = STATE.GAMEOVER;
ground.restartGround();
return true;
}
return false;
}
public boolean collectCoin(GameObject player, GameObject coin)
{
if(Rect.intersects(player.getRectangle(),coin.getRectangle()))
{
coidcollectet();
coinCounter += 1;
return true;
}
return false;
}
public void coidcollectet(){coin.coinCollected();}
public void stopPlay(){
player.setPlaying(false);
}
public void checkScore(){
if (player.score > Highstring)
{
saveHighscore();
loadScore();
}else {
loadScore();
}
}
public void startMusik(){
}
@Override
public void draw(Canvas canvas) {
final float scaleFactorX = getWidth() / (WIDTH*1.f);
final float scaleFactorY = getHeight() / (HEIGHT*1.f);
if (canvas != null && State == STATE.INGAME) {
final int savedState = canvas.save();
canvas.scale(scaleFactorX, scaleFactorY);
sun.draw(canvas);
Paint paint = new Paint();
paint.setColor(Color.BLACK);
paint.setTextSize(50);
paint.setTextAlign(Paint.Align.RIGHT);
canvas.drawText(""+coinCounter, WIDTH - 50 , 50 , paint);
bg.draw(canvas);
coinSymbol.draw(canvas);
busch.draw(canvas);
ground.draw(canvas);
player.draw(canvas);
obsticals.draw(canvas);
coin.draw(canvas);
canvas.restoreToCount(savedState);
}else if (canvas != null && State == STATE.MENU){
canvas.scale(scaleFactorX, scaleFactorY);
sun.draw(canvas);
bg.draw(canvas);
coinSymbol.draw(canvas);
busch.draw(canvas);
ground.draw(canvas);
Paint paint = new Paint();
paint.setColor(Color.BLACK);
paint.setTextSize(100);
paint.setTextAlign(Paint.Align.CENTER);
canvas.drawText("Start Game", WIDTH / 2 , HEIGHT / 2 , paint);
paint.setColor(Color.BLACK);
paint.setTextSize(50);
canvas.drawText("touch to start!", WIDTH / 2 , HEIGHT / 2 + 100 , paint);
paint.setTextAlign(Paint.Align.RIGHT);
canvas.drawText(""+coinCounter, WIDTH - 50 , 50 , paint);
paint.setTextAlign(Paint.Align.CENTER);
paint.setTextSize(20);
canvas.drawText("Highscore = "+Highstring, WIDTH / 2 , HEIGHT / 2 + 150 , paint);
}else if (canvas != null && State == STATE.GAMEOVER){
canvas.scale(scaleFactorX, scaleFactorY);
canvas.drawColor(Color.BLACK);
sun.draw(canvas);
bg.draw(canvas);
coinSymbol.draw(canvas);
busch.draw(canvas);
ground.draw(canvas);
Paint paint = new Paint();
paint.setColor(Color.BLACK);
paint.setTextSize(100);
paint.setTextAlign(Paint.Align.CENTER);
canvas.drawText("GAME OVER", WIDTH / 2 , HEIGHT / 2 , paint);
paint.setTextSize(50);
canvas.drawText("touch to restart!", WIDTH / 2 , HEIGHT / 2 + 100 , paint);
paint.setTextAlign(Paint.Align.RIGHT);
canvas.drawText(""+coinCounter, WIDTH -50 , 50 , paint);
paint.setTextAlign(Paint.Align.CENTER);
paint.setTextSize(20);
canvas.drawText("Highscore = "+Highstring, WIDTH / 2 , HEIGHT / 2 + 150 , paint);
}
}
}
あなたが私を助けてくれることを願っています！