在ViewPager和setFillAfter使用动画 [英] Using animation on a ViewPager and setFillAfter
问题描述
我有一个ViewPager，我需要移动作为一个整体上的按钮preSS。我使用动画这一点。
I have a ViewPager which I need to move as a whole on button press. I use an animation for this.
当我preSS，我翻译的X它。我用setFillAfter（真），以确保新的位置。
但是，当我改变ViewPager的页面，它就跳回到原来的x位置！
When I press it, I translate the 'x' for it. I use setFillAfter(true) to keep the new position. But when I change the page of the ViewPager, it jumps back to the original x-position!
我只看到了这个问题在Android 4.1与Android 4.0是没有问题的！所以它看起来像Android中的某种回归。
I only saw this issue on Android 4.1, with Android 4.0 there is no problem! So it looks like some kind of regression in Android.
我连着一个testproject在那里我可以重现该问题的周围没有我的所有其他的东西。我认为这是最好的，如果你要帮我算出这个导入项目在Eclipse，看到它自己。
I attached a testproject where I could reproduce the issue without all my other stuff around it. I think it is best if you want to help me figure this out to import the project in your Eclipse and see it for yourself.
我也加入到视频的，一个是关于我的HTC One X的，我看到了问题，另一个在平板电脑与Android 4.0，这里的问题是不存在的。
I also added to video's, one on my HTC One X where I see the issue, and the other on a tablet with Android 4.0, where the issue is not there.
我一直在拼命地寻找解决这个丑陋的副作用，但没有运气至今...
I have been desperately looking to fix this ugly side effect, but no luck till now...
（对不起，我大电影文件...）
(Sorry for the big movie files...)
编辑：
我添加以下内容：
@Override
public void onAnimationEnd(Animation animation) {
RelativeLayout.LayoutParams lp = (android.widget.RelativeLayout.LayoutParams) myViewPager.getLayoutParams();
if (!i)
lp.setMargins(300,0,0,0);
else
lp.setMargins(0,0,0,0);
myViewPager.setLayoutParams(lp);
}
这之后，它停留在正确的位置，但它闪烁很快，像动画结尾仍然显示，当我更改页边距，它仍然显示了偏移动画之后了。然后跳转到正确的位置。
After that it stays at the correct position, but it 'flickers' quickly, like the animation is still showing at the end and when I change the margin, it still shows the offset it had after animation. Then it jumps to the correct position.
推荐答案
主要的问题似乎是动画类型不正确的选择。你看，观看动画作为一种工具的无意以像ViewPager复杂的交互对象使用。它仅提供图纸地方意见的低成本动画。动画ViewPager的响应于用户的操作的视觉behaivior是未定义和不应该依赖。
丑陋的笔触，当你替换为GOST与真正的对象是自然的。
The main problem seems to be incorrect choice of animation type. You see, View Animation as a tool is not intended to be used with complex interactive objects like ViewPager. It offers only low-cost animation of the drawing place of views. The visual behaivior of the animated ViewPager in response to user-actions is undefined and should not be relied on. Ugly flicks, when you substitute a "gost" with the real object are only natural.
的机制，即意在您的情况使用，因为API 11是一个建立在视图中为优化性能的专业物业动画师： ViewPropertyAnimator 或不专业，但更多才多艺ObjectAnimator和AnimatorSet。
The mechanism, that is intended to use in your case since API 11 is specialized property animator built in Views for optimized performance: ViewPropertyAnimator, or not specialized, but more versatile ObjectAnimator and AnimatorSet.
属性动画使得观真正改变它的位置和功能正常情况。
Property animation makes the View to really change its place and function normally there.
要做好工程，使用，比方说，ViewPropertyAnimator，改变你的监听器设置这样的：
To make project, to use, say, ViewPropertyAnimator, change your listener setting to this:
btn.setOnClickListener(new OnClickListener() {
boolean b = false;
@Override
public void onClick(View v) {
if(b) {
myViewPager.animate().translationX(0f).setDuration(700);
}
else {
myViewPager.animate().translationX(300f).setDuration(700);
}
b=!b;
}
});
如果您希望只使用xml配置，坚持| ObjectAnimator和AnimatorSet。通过阅读上面的链接了解更多信息。
If you want to use xml configuration only, stick to |ObjectAnimator and AnimatorSet. Read through the above link for further information.
在情况下，你都急于支持pre-蜂窝设备，您可以用杰克沃顿的 NineOldAndroids 项目。希望有所帮助。
In case, you are anxious to support pre-Honeycomb devices, you can use Jake Warton's NineOldAndroids project. Hope that helps.
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