KeyListener-按住时释放的忽略键（Ubuntu,...）

Question

我有一个你可以攻击的游戏。当空格键被按下时，武器向下移动，当它被释放时，它应该向上移动。

1368696607559 - Pressed
1368696608052 - Released
1368696608053 - Pressed
1368696608082 - Released
1368696608083 - Pressed
1368696608112 - Released
1368696608113 - Pressed
1368696608143 - Released
1368696608144 - Pressed
1368696608173 - Released

//Inner Class
private class KeyDispatcher extends KeyAdapter implements ActionListener{

    private BitSet keyBits = new BitSet(256);
    private Timer timer = new Timer(20, this);
    boolean player1Attack = false, player2Attack = false;

    public KeyDispatcher(){
        timer.start();
    }

    @Override
    public void keyPressed(KeyEvent e) {
        int keyCode = e.getKeyCode();
        keyBits.set(keyCode);
    }

    @Override
    public void keyReleased(KeyEvent e) {
        int keyCode = e.getKeyCode();
        keyBits.clear(keyCode);
        if(player1Attack && !isKeyPressed(KeyEvent.VK_SPACE)){
            controller.stopAttack(0);
            player1Attack = false;
        }
        //player 2
        ...
    }

    public boolean isKeyPressed(final int keyCode) {
        return keyBits.get(keyCode);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if(isGameOver()){
            timer.stop();
        }else{
            //player1
            if(!player1Attack && isKeyPressed(KeyEvent.VK_RIGHT)){
                controller.moveRight(0);
            }
            if(!player1Attack && isKeyPressed(KeyEvent.VK_UP)){
                controller.moveUp(0);
            }
            if(!player1Attack && isKeyPressed(KeyEvent.VK_DOWN)){
                controller.moveDown(0);
            }
            if(!player1Attack && isKeyPressed(KeyEvent.VK_LEFT)){
                controller.moveLeft(0);
            }
            if(!player1Attack && isKeyPressed(KeyEvent.VK_NUMPAD0)){
                controller.attack(0); player1Attack = true; update();
            }
            //player2
            ...
        }
    }

}

    Action attack = new AbstractAction(){

        @Override
        public void actionPerformed(ActionEvent e) {
            controller.attack(0);
        }

    };
    Action stopAttack = new AbstractAction(){

        @Override
        public void actionPerformed(ActionEvent e) {
            controller.stopAttack(0);
        }

    };
    background.getInputMap().put(KeyStroke.getKeyStroke("SPACE"), "attack");
    background.getActionMap().put("attack", attack);

    background.getInputMap().put(KeyStroke.getKeyStroke("released SPACE"), "stopAttack");
    background.getActionMap().put("stopAttack", stopAttack);

提前致谢

Answer 1

您应该尝试使用键绑定。

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