我已经实现了一个Layout
必须向下和向上流动的动画。动画恰恰必须在低和高之间流动。此网格视图位于ExpandbleListView
. 因此,当我关闭所有组时,动画非常流畅。当列表上的组是打开的,有很多元素,但是动画被触发时,它并不像我希望的那样流畅。我将发布我的动画代码:
public void expand(final View v) {
v.measure(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
final int targtetHeight = v.getMeasuredHeight();
v.getLayoutParams().height = 0;
v.setVisibility(View.VISIBLE);
Animation a = new Animation() {
@Override
protected void applyTransformation(float interpolatedTime,
Transformation t) {
v.getLayoutParams().height = interpolatedTime == 1 ? LayoutParams.WRAP_CONTENT
: (int) (targtetHeight * interpolatedTime);
v.requestLayout();
}
@Override
public boolean willChangeBounds() {
return true;
}
};
Interpolator i = AnimationUtils.loadInterpolator(this,
android.R.anim.linear_interpolator);
a.setInterpolator(i);
a.setDuration(200);
v.startAnimation(a);
}
和 :
public static void collapse(final View v) {
final int initialHeight = v.getMeasuredHeight();
Animation a = new Animation() {
@Override
protected void applyTransformation(float interpolatedTime,
Transformation t) {
if (interpolatedTime == 1) {
v.setVisibility(View.GONE);
} else {
v.getLayoutParams().height = initialHeight
- (int) (initialHeight * interpolatedTime);
v.requestLayout();
}
}
@Override
public boolean willChangeBounds() {
return true;
}
};
// 1dp/ms
a.setDuration(200);
v.startAnimation(a);
}
如何使动画更流畅?
--> 编辑:我错了,我更正了