CardView 中的展开/折叠动画 [英] Expand/collapse animation in CardView
本文介绍了CardView 中的展开/折叠动画的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我尝试做这样的事情:
我设法做我的 cardViewAdapter 但我阻止放大我的卡片.我恢复了这个展开后:
我解决了上面的问题，但如果在我的 cardView 上，我同时显示 10 个元素以显示 50 个列表.如果我展开第一个，数字 11,21,31,41 也会展开.你有什么技巧可以避免这种情况发生吗?
我已经反映过了，这对我来说毫无意义.就在我的 OnClick 方法之前，我显示了一个文本视图，其中文本是位置.但是当我点击 id 是正确的，这意味着当我点击它时会检测到几张卡片的点击.我想我的 OnClickListener 中的视图可能有问题
我的 CardView
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"xmlns:app="http://schemas.android.com/apk/res-auto"android:layout_width="match_parent"android:layout_height="wrap_content"机器人:layout_margin="5dp"app:cardBackgroundColor="@android:color/white"应用程序:cardCornerRadius="2dp"app:cardElevation="2dp"><!-- Les CardView possèdent des attributs supplementaires dont- 卡片背景颜色- cardElevation pour l'élévation (donc aussi l'ombre)- cardCornerRadius 倒角--><android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"><!-- Les CardView agissent comme des FrameLayout,倾倒联合国垂直组织donc rajouter un LinearLayout --><文本视图android:id="@+id/text_cards"android:layout_width="match_parent"android:layout_height="wrap_content"android:background="?android:selectableItemBackground"机器人:填充=20dp"工具:文本=巴黎"android:fontFamily="sans-serif"android:textColor="#333"android:textSize="18sp"/><图像视图android:id="@+id/item_description_game_more"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center_vertical|end"android:transitionName="@string/transition_cards_view"app:srcCompat="@drawable/ic_expand_more_black_24dp"/><include layout="@layout/cards_resume_game_expand"/></android.support.design.widget.CoordinatorLayout></android.support.v7.widget.CardView></LinearLayout>我的新适配器
public class CardsViewAdapter extends RecyclerView.Adapter{私人游戏[] mDataset;私人布尔 isPopupVisible = false;int 旋转角度 = 0;//提供对每个数据项的视图的引用//复杂的数据项每个项可能需要多个视图，并且//您提供对视图持有者中数据项的所有视图的访问公共静态类 ViewHolder 扩展 RecyclerView.ViewHolder {//在这种情况下，每个数据项只是一个字符串公共 TextView mTextView;公共 ImageView imageView;公共 LinearLayout test2;公共 ViewHolder(View v) {超级(五)；mTextView = (TextView) v.findViewById(R.id.text_cards);imageView = (ImageView) v.findViewById(R.id.item_description_game_more);test2 = (LinearLayout) v.findViewById(R.id.popup_layout);}}//提供一个合适的构造函数(取决于数据集的种类)公共 CardsViewAdapter(Game[] myDataset) {mDataset = myDataset;}//创建新视图(由布局管理器调用)@覆盖public CardsViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {//创建一个新视图视图 v = LayoutInflater.from(parent.getContext()).inflate(R.layout.cards_resume_game, parent, false);//设置视图的大小、边距、填充和布局参数//...ViewHolder vh = 新的 ViewHolder(v);返回 vh;}//替换视图的内容(由布局管理器调用)@覆盖公共无效 onBindViewHolder(最终 ViewHolder 持有人，int 位置){//- 在这个位置从你的数据集中获取元素//- 用该元素替换视图的内容holder.mTextView.setText(String.valueOf(mDataset[position].getId_game()));holder.imageView.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {//执行点击动作如果(isPopupVisible){isPopupVisible = false;ObjectAnimator anim = ObjectAnimator.ofFloat(v, "rotation",rotationAngle, rotationAngle + 180);动画.setDuration(500);动画开始()；旋转角度 += 180;旋转角度 = 旋转角度%360;//CardsAnimationHelper.changeIconAnim((TextView) v, getString(R.string.icon_chevron_up));CardsAnimationHelper.collapse(holder.test2);} 别的 {isPopupVisible = true;ObjectAnimator anim = ObjectAnimator.ofFloat(v, "rotation",rotationAngle, rotationAngle + 180);动画.setDuration(500);动画开始()；旋转角度 += 180;旋转角度 = 旋转角度%360;//CardsAnimationHelper.changeIconAnim((TextView) v, getString(R.string.icon_chevron_down));CardsAnimationHelper.expand(holder.test2);}}});}//返回数据集的大小(由布局管理器调用)@覆盖公共 int getItemCount() {返回 mDataset.length;}} 解决方案
您需要创建一个自定义类来扩展 CardView.在该类中放置以下方法:
public void expand() {int initialHeight = getHeight();措施(LayoutParams.MATCH_PARENT，LayoutParams.WRAP_CONTENT)；int targetHeight = getMeasuredHeight();int distanceToExpand = targetHeight - initialHeight;动画 a = 新动画(){@覆盖protected void applyTransformation(float interpolatedTime, Transformation t) {如果(插值时间== 1){//展开后执行此操作}getLayoutParams().height = (int) (initialHeight + (distanceToExpand * interpolatedTime));请求布局()；}@覆盖公共布尔 willChangeBounds() {返回真；}};a.setDuration((long) distanceToExpand);开始动画(一)；}公共无效折叠(intcollapsedHeight){int initialHeight = getMeasuredHeight();int distanceToCollapse = (int) (initialHeight - collapsedHeight);动画 a = 新动画(){@覆盖protected void applyTransformation(float interpolatedTime, Transformation t) {如果(插值时间== 1){//折叠后执行此操作}Log.i(TAG, "Collapse | InterpolatedTime = " + interpolatedTime);getLayoutParams().height = (int) (initialHeight - (distanceToCollapse * interpolatedTime));请求布局()；}@覆盖公共布尔 willChangeBounds() {返回真；}};a.setDuration((long) distanceToCollapse);开始动画(一)；}请注意，当您折叠它时，您需要传递您希望它在折叠时的高度.展开时的高度设置为 WRAP_CONTENT.
我还添加了将在动画完成时运行的 if/else 语句.
祝你好运！
I try to do something like this :
I managed to do my cardViewAdapter but I block to enlarge my cards. I resumed the code of this response (Here the name of the class is : CardsAnimationHelper) to do the animation but it's superimposed.
Before expand: After expand:
I solved the problem above but if on my cardView I display 10 elements at the same time for a list of 50. If I expand the first, the numbers 11,21,31,41 will also expand. Do you have a trick for this not to happen?
I have reflected, it makes no sense to me. Just before my OnClick method I display a textview where the text is the position. But when I click id are correct so that would mean that when I click it detects the click on several cards. I think I may have a problem with a view in my OnClickListener
My CardView
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
app:cardBackgroundColor="@android:color/white"
app:cardCornerRadius="2dp"
app:cardElevation="2dp">
<!-- Les CardView possèdent des attributs supplémentaires dont
- cardBackgroundColor
- cardElevation pour l'élévation (donc aussi l'ombre)
- cardCornerRadius pour arrondir les angles
-->
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Les CardView agissent comme des FrameLayout,
pour avoir une organisation verticale nous devons
donc rajouter un LinearLayout -->
<TextView
android:id="@+id/text_cards"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?android:selectableItemBackground"
android:padding="20dp"
tools:text="Paris"
android:fontFamily="sans-serif"
android:textColor="#333"
android:textSize="18sp" />
<ImageView
android:id="@+id/item_description_game_more"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|end"
android:transitionName="@string/transition_cards_view"
app:srcCompat="@drawable/ic_expand_more_black_24dp"/>
<include layout="@layout/cards_resume_game_expand"/>
</android.support.design.widget.CoordinatorLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
My New Adapter
public class CardsViewAdapter extends RecyclerView.Adapter<CardsViewAdapter.ViewHolder> {
private Game[] mDataset;
private boolean isPopupVisible = false;
int rotationAngle = 0;
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class ViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public TextView mTextView;
public ImageView imageView;
public LinearLayout test2;
public ViewHolder(View v) {
super(v);
mTextView = (TextView) v.findViewById(R.id.text_cards);
imageView = (ImageView) v.findViewById(R.id.item_description_game_more);
test2 = (LinearLayout) v.findViewById(R.id.popup_layout);
}
}
// Provide a suitable constructor (depends on the kind of dataset)
public CardsViewAdapter(Game[] myDataset) {
mDataset = myDataset;
}
// Create new views (invoked by the layout manager)
@Override
public CardsViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.cards_resume_game, parent, false);
// set the view's size, margins, paddings and layout parameters
//...
ViewHolder vh = new ViewHolder(v);
return vh;
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
// - get element from your dataset at this position
// - replace the contents of the view with that element
holder.mTextView.setText(String.valueOf(mDataset[position].getId_game()));
holder.imageView.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
if (isPopupVisible) {
isPopupVisible = false;
ObjectAnimator anim = ObjectAnimator.ofFloat(v, "rotation",rotationAngle, rotationAngle + 180);
anim.setDuration(500);
anim.start();
rotationAngle += 180;
rotationAngle = rotationAngle%360;
// CardsAnimationHelper.changeIconAnim((TextView) v, getString(R.string.icon_chevron_up));
CardsAnimationHelper.collapse(holder.test2);
} else {
isPopupVisible = true;
ObjectAnimator anim = ObjectAnimator.ofFloat(v, "rotation",rotationAngle, rotationAngle + 180);
anim.setDuration(500);
anim.start();
rotationAngle += 180;
rotationAngle = rotationAngle%360;
// CardsAnimationHelper.changeIconAnim((TextView) v, getString(R.string.icon_chevron_down));
CardsAnimationHelper.expand(holder.test2);
}
}
});
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return mDataset.length;
}
}
解决方案
You'll need to create a custom class that extends CardView. Inside that class put the following methods:
public void expand() {
int initialHeight = getHeight();
measure(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
int targetHeight = getMeasuredHeight();
int distanceToExpand = targetHeight - initialHeight;
Animation a = new Animation() {
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
if (interpolatedTime == 1){
// Do this after expanded
}
getLayoutParams().height = (int) (initialHeight + (distanceToExpand * interpolatedTime));
requestLayout();
}
@Override
public boolean willChangeBounds() {
return true;
}
};
a.setDuration((long) distanceToExpand);
startAnimation(a);
}
public void collapse(int collapsedHeight) {
int initialHeight = getMeasuredHeight();
int distanceToCollapse = (int) (initialHeight - collapsedHeight);
Animation a = new Animation() {
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
if (interpolatedTime == 1){
// Do this after collapsed
}
Log.i(TAG, "Collapse | InterpolatedTime = " + interpolatedTime);
getLayoutParams().height = (int) (initialHeight - (distanceToCollapse * interpolatedTime));
requestLayout();
}
@Override
public boolean willChangeBounds() {
return true;
}
};
a.setDuration((long) distanceToCollapse);
startAnimation(a);
}
Note that when you collapse it, you'll need to pass along the height you want it to be when collapsed. The height when expanded is set to WRAP_CONTENT.
I've also added if/else statements that will run when the animation has completed.
Good luck!
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