我是开发游戏的新手，我试图开发一款简单的射击太空游戏，一切都很完美。现在，我想在用户点击后退按钮时创建一个Dialog弹出窗口，游戏应该暂停，直到用户按下简历。游戏暂停但是当我点击恢复按钮时，游戏仍然暂停在这里是我的游戏循环类：
public class Game extends SurfaceView implements Runnable , SurfaceHolder.Callback {
public static MyPreferences pref;
public static Levels level;
public static int SCREEN_W;
public static int SCREEN_H;
public static boolean running;
private static Thread thread = null;
private SurfaceHolder holder;
private Canvas canvas;
private Paint p = new Paint();
public static Handler handler = new Handler();
public static Resources res;
public static Timer timer;
public Game(Context context) {
super(context);
res = getResources();
holder = getHolder();
holder.addCallback(this);
level = new Levels();
timer = new Timer();
pref = new MyPreferences(context);
System.out.println("Create Game instance");
}
public void run() {
init();
long lastTime = System.nanoTime();
double delta = 0;
double ns = 1000000000.0 / 30.0;
System.out.println("Run method" + running);
while (running) {
System.out.println("+++++++++++++++++++++++++++++++++++");
long now = System.nanoTime();
delta+=(now - lastTime) / ns;
lastTime = now;
if(!holder.getSurface().isValid()){continue;}
canvas = holder.lockCanvas();
SCREEN_W = canvas.getWidth();
SCREEN_H= canvas.getHeight();
while (delta >-1) {
tick();
delta--;
}
level.level1();
render(canvas);
holder.unlockCanvasAndPost(canvas);
if(ControlPanel.PLAYER_POWER <=0){
System.out.println("Loose!");
ControlPanel.PLAYER_POWER = 100;
stop();
start();
}
}
}
private void render(Canvas c) {
handler.render(c);
textOnScreen(c);
}
public void tick(){
handler.tick();
}
public void init(){
System.out.println("Init game...");
ControlPanel.COINS = pref.getInt("coins");
MainActivity.music.backgroundMusic();
handler.addSpaceShip(new Player(500, 500, 10, 10, handler, Sprite.getSprite(0)));
// handler.addKing(new King(Game.SCREEN_W / 2, 100,
// 40, 40, handler, Sprite.getSprite(18), 0));
}
public void start() {
if(thread==null){
System.out.println("Start thread");
thread = new Thread(this);
thread.start();
timer.start();
}
if(!running) running = true;
System.out.println("Running = " + running);
}
public static void stop() {
System.out.println("Stop thread");
running = false;
timer.stop();
pref.putInt("coins", ControlPanel.COINS);
System.out.println("Running = " + running);
}
public void destroyed() {
System.out.println("Stop");
running = false;
try {
thread.join(300);
thread.interrupt();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void textOnScreen(Canvas c){
p = new Paint();
p.setColor(Color.YELLOW);
p.setTextSize(50);
c.drawText("POWER = " + ControlPanel.PLAYER_POWER, SCREEN_W / 2 ,50 , p);
c.drawText("Time = " + timer.timeFormat(), 100 ,50 , p);
c.drawText("Coins = " + ControlPanel.COINS, 10 ,SCREEN_H - 10 , p);
p.setColor(Color.WHITE);
c.drawText("Bullets = " +ControlPanel.BULLET, SCREEN_W - 390,SCREEN_H - 10 , p);
p.setColor(Color.WHITE);
c.drawText(ControlPanel.Distance + " km ", SCREEN_W /2 - 200,SCREEN_H - 10 , p);
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
System.out.println("###surface created!");
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
System.out.println("###surface Changed!");
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
System.out.println("###surface Destroid!");
}
}
这是我的Dialog类：
public class DialogPause extends Dialog implements android.view.View.OnClickListener{
Button btn;
public DialogPause(Context context) {
super(context);
setContentView(R.layout.pause_game);
Game.running = false;
btn = (Button) findViewById(R.id.resume);
btn.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if(v.getId() == R.id.resume){
Game.running = true;
this.dismiss();
}
}
}
和我的MainActivity类：
public class MainActivity extends Activity implements OnTouchListener {
public Game game;
public static Music music;
@SuppressLint("ClickableViewAccessibility")
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Full screen
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
music = new Music(this);
game = new Game(this);
game.setOnTouchListener(this);
setContentView(game);
}
protected void onStart() {
game.start();
super.onStart();
}
@Override
protected void onStop() {
music.StopBackgroundMusic();
game.destroyed();
super.onStop();
}
@Override
public void onBackPressed() {
new DialogPause(this).show();
}
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View v, MotionEvent event) {
try {
//the x and y point
float x = event.getX();
float y = event.getY();
//The w and h of the space ship
int spaceShipW = Game.handler.spaceShip.get(0).getSprite().getWidth();
int spaceShipH = Game.handler.spaceShip.get(0).getSprite().getWidth();
//Moving
if( x > 10 || x > Game.SCREEN_W - spaceShipW ){
Game.handler.spaceShip.get(0).setX((int) x - (spaceShipW / 2) - 64);
Game.handler.spaceShip.get(0).setY((int) y - (spaceShipH +200) );
}
//Shooting
Bullet.shoot(y, x);
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN :
//Change sprite image when click
Game.handler.spaceShip.get(0).getSprite().setWhatColumnX(0);
Game.handler.spaceShip.get(0).getSprite().setFramesToAnimate(2);
case MotionEvent.ACTION_MOVE :
break;
case MotionEvent.ACTION_UP :
//Change sprite image when release
Game.handler.spaceShip.get(0).getSprite().setWhatColumnX(1);
Game.handler.spaceShip.get(0).getSprite().setFramesToAnimate(0);
break;
default:
break;
}
} catch (Exception e) {
}
return true;
}
}
顺便说一句，我希望听到更多关于我创建的游戏循环代码的意见，因为我退出游戏时有时会崩溃。
如何在游戏加载完成后使用一些asyncTask，因为它需要4秒才能加载游戏。 感谢所有帮助我的人，我非常感谢！
答案 0 :(得分：5)
添加布尔值paused，每当按下后退按钮切换值（paused = !paused;）
在你拨打tick之前循环添加一个条件：
if(!paused) tick();
最好不要乱用线程。