Question

我已经实现了两个viewpage，一个来自android的viewpager，用于水平滑动左右碎片。第二个是片段内的自定义垂直viewpager，用于向上和向下滑动图像。我可以垂直滑动任何地方，但我不能水平滑动viewpager。水平viewpager只能从屏幕边缘刷过。如何使水平viewpager可以在任何地方水平滑动？

这是我的自定义垂直viewpager。

public class VerticalViewPager extends ViewPager {
public VerticalViewPager(Context context) {
    super(context);
    init();
}

public VerticalViewPager(Context context, AttributeSet attrs) {
    super(context, attrs);
    init();
}

private void init() {
    // The majority of the magic happens here
    setPageTransformer(true, new VerticalPageTransformer());
    // The easiest way to get rid of the overscroll drawing that happens on the left and right
    setOverScrollMode(OVER_SCROLL_NEVER);
}

private class VerticalPageTransformer implements ViewPager.PageTransformer {

    @Override
    public void transformPage(View view, float position) {

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

        } else if (position <= 1) { // [-1,1]
            view.setAlpha(1);

            // Counteract the default slide transition
            view.setTranslationX(view.getWidth() * -position);

            //set Y position to swipe in from top
            float yPosition = position * view.getHeight();
            view.setTranslationY(yPosition);

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

/**
 * Swaps the X and Y coordinates of your touch event.
 */
private MotionEvent swapXY(MotionEvent ev) {
    float width = getWidth();
    float height = getHeight();

    float newX = (ev.getY() / height) * width;
    float newY = (ev.getX() / width) * height;

    ev.setLocation(newX, newY);

    return ev;
}

@Override
public boolean onInterceptTouchEvent(MotionEvent ev){
    boolean intercepted = super.onInterceptTouchEvent(swapXY(ev));
    swapXY(ev); // return touch coordinates to original reference frame for any child views
    return intercepted;
}

@Override
public boolean onTouchEvent(MotionEvent ev) {
    return super.onTouchEvent(swapXY(ev));
}}

Answer 1

在VerticalViewPager中覆盖canScrollHorizontally：

@Override
public boolean canScrollHorizontally(int direction) {
    return false;
}

Answer 2

您应该尝试this Link

它同时具有水平+垂直ViewPager的功能。您可以从here

下载示例代码

Viewpager只能从屏幕边缘滑动

2 个答案: