我一直在努力从http://obviam.net/index.php/a-very-basic-the-game-loop-for-android/的例子在这个我想做一些改变。如何将图像从下往上连续移动?
Speed.java
public class Speed {
public static final int DIRECTION_RIGHT = 1;
public static final int DIRECTION_LEFT = -1;
public static final int DIRECTION_UP = -1;
public static final int DIRECTION_DOWN = 1;
private float xv = 1; // velocity value on the X axis
private float yv = 1; // velocity value on the Y axis
private int xDirection = DIRECTION_RIGHT;
private int yDirection = DIRECTION_DOWN;
public Speed() {
this.xv = 1;
this.yv = 1;
}
public Speed(float xv, float yv) {
this.xv = xv;
this.yv = yv;
}
public float getXv() {
return xv;
}
public void setXv(float xv) {
this.xv = xv;
}
public float getYv() {
return yv;
}
public void setYv(float yv) {
this.yv = yv;
}
public int getxDirection() {
return xDirection;
}
public void setxDirection(int xDirection) {
this.xDirection = xDirection;
}
public int getyDirection() {
return yDirection;
}
public void setyDirection(int yDirection) {
this.yDirection = yDirection;
}
// changes the direction on the X axis
public void toggleXDirection() {
xDirection = xDirection * -1;
}
// changes the direction on the Y axis
public void toggleYDirection() {
yDirection = yDirection * -1;
}
}
利用这一点,在各个方向上的图像移动。现在我只想限制这个从底部到顶部的运动。 onclick的功能是,我们可以点击并拖动图像到需要的位置。我想用图像消失或去其他活动来取代它。请帮助我对此代码进行更改。提前致谢。
我也想知道...请帮忙... – ALi
用'private float xv = 0;'替换'private float xv = 1;'? –
@SherifelKhatib没有解决问题。 –