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显示动画：
mShowAction = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 1.0f,
Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,
0.0f, Animation.RELATIVE_TO_SELF, 0.0f);
mShowAction.setDuration(500);
隐藏动画：
mHiddenAction = new TranslateAnimation(Animation.RELATIVE_TO_SELF,
0.0f, Animation.RELATIVE_TO_SELF, 1.0f,
Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,
0.0f);
mHiddenAction.setDuration(500);
View的显示：
mSidebarLayout.startAnimation(mShowAction);
mSidebarLayout.setVisibility(View.VISIBLE);
mSidebarHideBtn.setVisibility(View.GONE);
View的隐藏：
mSidebarLayout.startAnimation(mHiddenAction);
mSidebarLayout.setVisibility(View.GONE);
mSidebarHideBtn.setVisibility(View.VISIBLE);
动画效果：
显示时view从右边向左滑动出现；隐藏时从左向右滑动隐藏；
动画效果 View控件的显示和隐藏效果
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原文地址：http://www.cnblogs.com/shenchanghui/p/4932208.html
