列表视图中的ListView [英] ListView within a listview
问题描述
我有一个基于自定义布局项目显示家长的ListView。当任何项目用户点击,然后我需要一个孩子的ListView添加到该项目,并应扩大动画显示父的ListView的整体项目。 [所有数据需要动态地添加]
任何建议....
I have a parent ListView shown with items based on a custom layout. When a user clicks on any item then I need to add a child ListView to that item and should display the overall item of the parent ListView with expanding animation. [All data need to be added dynamically] Any suggestions....
推荐答案
简单,你可以在布局中添加的项目(通过XML或code)和显示(隐藏)与动画。下面是例如,从Udinic。它有ListView项动画扩大和需要API级别只4+。
这个例子是如此简单。你只定义您的项目的LinearLayout
名为工具栏
Simple you can add your item in a layout (via xml or code) and show(hide) with animation. Here is example from Udinic. It had listview item expand with animation and require API level only 4+.
This example's so simple. You only define your item in linearlayout
called toolbar
在onItemClick事件中使用ExpanAnimation
in onItemClick event use ExpanAnimation
/**
* This animation class is animating the expanding and reducing the size of a view.
* The animation toggles between the Expand and Reduce, depending on the current state of the view
* @author Udinic
*
*/
public class ExpandAnimation extends Animation {
private View mAnimatedView;
private LayoutParams mViewLayoutParams;
private int mMarginStart, mMarginEnd;
private boolean mIsVisibleAfter = false;
private boolean mWasEndedAlready = false;
/**
* Initialize the animation
* @param view The layout we want to animate
* @param duration The duration of the animation, in ms
*/
public ExpandAnimation(View view, int duration) {
setDuration(duration);
mAnimatedView = view;
mViewLayoutParams = (LayoutParams) view.getLayoutParams();
// decide to show or hide the view
mIsVisibleAfter = (view.getVisibility() == View.VISIBLE);
mMarginStart = mViewLayoutParams.bottomMargin;
mMarginEnd = (mMarginStart == 0 ? (0- view.getHeight()) : 0);
view.setVisibility(View.VISIBLE);
}
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
super.applyTransformation(interpolatedTime, t);
if (interpolatedTime < 1.0f) {
// Calculating the new bottom margin, and setting it
mViewLayoutParams.bottomMargin = mMarginStart
+ (int) ((mMarginEnd - mMarginStart) * interpolatedTime);
// Invalidating the layout, making us seeing the changes we made
mAnimatedView.requestLayout();
// Making sure we didn't run the ending before (it happens!)
} else if (!mWasEndedAlready) {
mViewLayoutParams.bottomMargin = mMarginEnd;
mAnimatedView.requestLayout();
if (mIsVisibleAfter) {
mAnimatedView.setVisibility(View.GONE);
}
mWasEndedAlready = true;
}
}
}
详细的用法是在项目中。
Detail usage is in project.
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