Android的viewpager与DepthPageTransformer z-index的问题 [英] Android viewpager with DepthPageTransformer z-index issue

问题描述

我实现了一个viewpager与DepthPageTransformer，在网页我有一些输入（收音机，检查boxs，选择选项...）。它的工作原理除了一个有线的错误罚款：有时，当我在页面P2的那个位置上的一个页面P1点击位置（X，Y）输入被触发。

I implemented a viewpager with a DepthPageTransformer , in pages I have some inputs ( radio , check boxs , select options ... ). It works fine except one wired bug: Sometimes when I click on position(x,y) on a page P1 the input in that position of page P2 gets triggered.

P1：

P2（P1后一个）：

P2( the one after P1):

现在，当我点击页面上的P1这个位置：

Now when I click on this position on page P1 :

我得到的页面P2的显示选择选项：

I get the select options displayed of page P2:

这是在Web开发类似于z-index的问题。

It's similar to z-index problem in web development.

在DepthPage变压器的code是一样的文档：的http://developer.android.com/training/animation/screen-slide.html#pagetransformer.

The code of the DepthPage Transformer is the same as in the documentation : http://developer.android.com/training/animation/screen-slide.html#pagetransformer.

public class DepthPageTransformer implements ViewPager.PageTransformer {
private static final float MIN_SCALE = 0.75f;
@Override
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.setAlpha(1);
        view.setTranslationX(0);
        view.setScaleX(1);
        view.setScaleY(1);

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

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

        // 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);
    }
}
}

这是如何解决这个问题的重叠任何想法？

Any idea on how to solve this overlapping problem ?

推荐答案

试试这个：

public class DepthPageTransformer implements ViewPager.PageTransformer {
private static final float MIN_SCALE = 0.75f;
@Override
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.setAlpha(1);
    view.setTranslationX(0);
    view.setScaleX(1);
    view.setScaleY(1);
    // -------- THIS LINE ---
    view.bringToFront();
    // -------- THIS LINE ---

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

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

    // 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);
}
}
}

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