得到Y位置百分比编程 [英] get Y position percentage programmatically

问题描述

我在做一些以便翻译动画。我想两种方式：通过XML和编程

I'm doing some translate animations with a view. I'm trying both ways: By xml and programmatically.

这是我如何定义被XML翻译：

This is how I have defined the translation by xml:

<set xmlns:android="http://schemas.android.com/apk/res/android">  
    <translate android:fromYDelta="0%" android:toYDelta="-70%" android:duration="1000"/>
</set>

此方式，它工作得很好，但我意识到，我需要更好的编程方式使用animationListener我可以定义操作来occurr当动画完成。

This way it works fine, but I've realized that I better need the programmatically way as using the animationListener I can define actions to occurr when the animation finishes.

这是我如何做到这一点编程方式：

This is how I do it programmatically:

slide_up = new TranslateAnimation(valuesContainer.getX(),
            valuesContainer.getX(),
            valuesContainer.getY(),
            valuesContainer.getY() - 70);
    slide_up.setDuration(1000);
    slide_up.setAnimationListener(new AnimationListener() {
        @Override
        public void onAnimationStart(Animation animation) {
            // TODO Auto-generated method stub
        }
        @Override
        public void onAnimationRepeat(Animation animation) {

        }
        @Override
        public void onAnimationEnd(Animation animation) {
            //SOMETHING HAPPENS
        }
    });

定义 fromYDelta 和 toYDelta 值（图像只是移动Y轴）时，问题就来了。在XML中，我使用百分比（％）它和它的作品，我需要的方式，但我不知道如何设置的值同样的方式，但编程。

The problem comes when defining the fromYDelta and toYDelta values (the image just moves in the Y axis). In the xml, I do it using percentages (%) and it works the way I need, but I don't know how to set the values this same way but programmatically.

推荐答案

我来结合两者的方法，这样的解决方案。

I have come to a solution combining both of this methods.

我定义在这样的XML动画，堪称F.E. slide_up_anim.xml

I define the animation in a xml like this, called f.e. slide_up_anim.xml

<set xmlns:android="http://schemas.android.com/apk/res/android">  
    <translate android:fromYDelta="0%" android:toYDelta="-70%" android:duration="1000"/>
</set>

然后，我设置AnimationListener这个动画是这样的：

And then, I set the AnimationListener for this animation this way:

slide_up = AnimationUtils.loadAnimation(getActivity(), R.anim.slide_up_anim);

slide_up.setAnimationListener(new AnimationListener() {
        @Override
        public void onAnimationStart(Animation animation) {

        }
        @Override
        public void onAnimationRepeat(Animation animation) {

        }
        @Override
        public void onAnimationEnd(Animation animation) {

        }
    });

这样我可以定义fromYDelta和toYDelta百分比，也听动画事件。

This way I can define the fromYDelta and toYDelta in percentage, and also listen for animation events.

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