所以这就是这笔交易:
我有一个带有Camera Preview片段的自定义ViewPager和另一个页面,两者都可以正常工作。两者之间的过渡使相机变为白色而不是仅保持视图。我使用了一个修改使其成为垂直视图寻呼机而不是水平。
在它垂直之前,股票视图寻呼机工作得很好。这是以前的样子:http://i.imgur.com/eaaHGvR.gif
现在: http://i.imgur.com/RKxiYZL.gif
我错过了什么让它变白?
自定义视图寻呼机:
public class VerticalPager extends ViewPager {
public VerticalPager(Context context) {
super(context);
init();
}
public VerticalPager(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));
}
}
修改 经过一些修补,我越来越近了,但仍然疯狂的闪烁和错误。以前,在横向上,它有一些边缘问题,但没有像这样闪烁:
http://i.imgur.com/aBcreT9.gif
我添加了view.BringToFront();在verticalpager中,当我在寻呼机本身设置适配器时请求透明度。