android - TranslateAnimation - 动画启动时图像消失

Question

我尝试在 xml 文件中定义动画，但它没有提供足够的灵 active 。关于如何使它在代码中工作的任何想法。

我的图像消失，然后在动画开始时重新出现。本质上，当我抬起手指时，我需要图像以慢速滑动的方式移回其原始位置。由于某种原因，这没有发生。

Java代码:

chargeButton.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        int x_cord = (int) event.getRawX();
        int y_cord = (int) event.getRawY();

        switch (event.getActionMasked()){
            case MotionEvent.ACTION_DOWN:
                break;
            case MotionEvent.ACTION_MOVE:
                chargeButton.setLayoutParams(setPosition(x_cord, false));
                break;
            case MotionEvent.ACTION_UP:
                int x_start = x_cord;
                x_cord = 0;
                slowMove(x_start, x_cord, false);

                break;
            default:
                break;
        }
        return true;
    }
});


}

public void slowMove(int x_start, int x_final, boolean pay)
{
Animation transAnimation = new TranslateAnimation(x_start, x_final, 0, 0);
transAnimation.setFillAfter(true);
transAnimation.setDuration(1000);
if (pay)
    payButton.startAnimation(transAnimation);
else
{
    chargeButton.clearAnimation();
    chargeButton.startAnimation(transAnimation);
}
}

如果能得到任何帮助，我将不胜感激。

Answer 1

I want to be able to change the fromXdelta in my code itself.

你为什么不使用 constructor本身？

 public TranslateAnimation (float fromXDelta, float toXDelta, float fromYDelta, float toYDelta)

---

fromXDelta  Change in X coordinate to apply at the start of the animation
toXDelta    Change in X coordinate to apply at the end of the animation
fromYDelta  Change in Y coordinate to apply at the start of the animation
toYDelta    Change in Y coordinate to apply at the end of the animation