我有一个活动,其contentView布局如下:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/schedule_item_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/item_list"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<LinearLayout
android:id="@+id/bottom_menu"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:visibility="gone" >
<!-- some buttons -->
</LinearLayout>
</LinearLayout>
我想显示并隐藏底部线性布局,以使其像底部菜单一样,我创建一个这样的函数:
private void showBottomMenuView()
{
if (mBottomMenuView.getVisibility() != View.VISIBLE) {
Animation slideinAnimation = new TranslateAnimation(0.0f, 0.0f, 1.0f, 0.0f);
slideinAnimation.setDuration(300);
mBottomMenuView.startAnimation(slideinAnimation);
mBottomMenuView.setVisibility(View.VISIBLE);
}
}
但是当我想显示底部布局(mBottomMenuView)时,它不起作用。视图不会从底部顺利滑入,只是突然出现
但是当我从xml加载动画时,它确实有效。
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromYDelta="100%"
android:toYDelta="0%"
android:duration="300"/>
</set>
private void showBottomMenuView()
{
if (mBottomMenuView.getVisibility() != View.VISIBLE) {
Animation slideinAnimation = AnimationUtils.loadAnimation(getActivity(), R.anim.slide_in);
mBottomMenuView.startAnimation(slideinAnimation);
mBottomMenuView.setVisibility(View.VISIBLE);
}
}
为什么以前的新动画不起作用?
答案 0 :(得分:3)
您想测量屏幕高度,然后使用
Animation slideinAnimation = new TranslateAnimation(0.0f, 0.0f, mesureHeight, 0.0f);
或
Animation slideinAnimation = new TranslateAnimation(Animation.RELATIVE_TO_PARENT,0.0f,
Animation.RELATIVE_TO_PARENT, 0.0f,
Animation.RELATIVE_TO_PARENT, 1.0f,
Animation.RELATIVE_TO_PARENT, 0.0f);