挑战:ViewPager的自定义动画.更改所选元素的高度(查看折叠)

Question

我目前正在ViewPager中切换页面之间的自定义动画.当我向左滑动时,View向左移动,从下方移动,新的View将出现在前面.我想制作视图,向左移动(我处理)缩小,如下图所示:

在第二张和第三张图片上,我没有想到新的View出现在前面,但我认为没有必要.你知道如何修改代码吗？

我想更改TableLayout,RelativeLayout和FrameLayout的高度,并保持两个TextView的高度.此外,我将不得不改变整个视图的X位置.

我期待着你的创意答案(代码).下面我附上我的动画代码.

import android.view.View;
import android.widget.RelativeLayout;
import android.annotation.SuppressLint;
import android.support.v4.view.ViewPager.PageTransformer;

public class DepthPageTransformer implements PageTransformer {
    private static float MIN_SCALE = 0.75f;

    @SuppressLint("NewApi")
    public void transformPage(View view, float position) {
        int pageWidth = view.getWidth();

        if (position < -1) { // [-Infinity,-1)
            // This page is way off-screen to the left.
            view.setAlpha(0);

        } else if (position <= 0) { // [-1,0]
            // Use the default slide transition when moving to the left page
            view.setTranslationX(0);
            view.setScaleX(1);
            view.setScaleY(1);
            //float scaleFactor = (1 - Math.abs(position));

            //WHAT TO PUT HERE TO ARCHIVE MY GOAL??

            //This is how I can get particular layouts:
            // RelativeLayout relativeLayout = (RelativeLayout) view.findViewById(R.id.fragment_object_canvas_RelativeLayout1);
            //relativeLayout.setScaleX(scaleFactor);
            //relativeLayout.setScaleY(scaleFactor);

        } else if (position <= 1) { // (0,1]
            // Fade the page out.
            view.setAlpha(1 - position);

            // Counteract the default slide transition
            view.setTranslationX(pageWidth * -position);
            //view.setRotation(1 - (position*360));

            // Scale the page down (between MIN_SCALE and 1)
            float scaleFactor = MIN_SCALE
                    + (1 - MIN_SCALE) * (1 - Math.abs(position));
            view.setScaleX(scaleFactor);
            view.setScaleY(scaleFactor);

        } else { // (1,+Infinity]
            // This page is way off-screen to the right.
            view.setAlpha(0);
        }
    }
}

更新:

我可以使用以下代码操纵整个View的高度(现在我只能这样做):

  LinearLayout relativeLayout = (LinearLayout) view.findViewById(R.id.fragment_object_canvas_linearLayout1);
            relativeLayout.setLayoutParams(new FrameLayout.LayoutParams(relativeLayout.getWidth(), NEW_HEIGHT_HERE)));

但是,我不确定应该将什么放入NEW_HEIGHT_HERE变量以使其工作正常...

Answer 1

尝试使用位置浮点变量.获得布局的高度和......:

relativeLayout.setLayoutParams(....,position*height+height)