Android 刷卡到喜爱的项目
当我无意中发现的时候,我正在浏览谷歌的材料文档。它显示了一个卡片项目,可以向右滑动以收藏该项目 我想模仿这种行为,但失败了多次。我能找到的所有库和教程都是关于“滑动以删除”。我尝试将两个视图堆叠在一起,上面的视图应该被滑动,这样下面的视图就可以被看到。我试图用Android 刷卡到喜爱的项目,android,animation,android-recyclerview,android-cardview,Android,Animation,Android Recyclerview,Android Cardview,当我无意中发现的时候,我正在浏览谷歌的材料文档。它显示了一个卡片项目,可以向右滑动以收藏该项目 我想模仿这种行为,但失败了多次。我能找到的所有库和教程都是关于“滑动以删除”。我尝试将两个视图堆叠在一起,上面的视图应该被滑动,这样下面的视图就可以被看到。我试图用ItemTouchHelper实现这一点,但是这个类似乎只能帮助滑动以删除和移动以重新排序列表操作 如何实现此滑动操作?默认的ItemTouchHelper为onsweed提供回调,它可以包含您选择的任何逻辑,而不仅仅是删除。您肯定可以使用
ItemTouchHelper
实现这一点,但是这个类似乎只能帮助滑动以删除和移动以重新排序列表操作
如何实现此滑动操作?默认的ItemTouchHelper
为onsweed
提供回调,它可以包含您选择的任何逻辑,而不仅仅是删除。您肯定可以使用代码将项目标记为收藏夹。但是,我认为这需要对物品进行完全的滑动,而不是像视频中显示的那样进行部分滑动
以下两种方法都使用Canvas和graphics类进行细粒度控制,您应该能够镜像行为
说明如何在滑动项目时显示操作按钮。它修改并删除不必要的滑动方向处理
要获得更详细、逐步的解释,您也可以查看。当它显示“编辑”和“删除”按钮时,这些按钮的onClick回调中的代码可以替换为将项目标记为收藏夹。您需要使用
- 这是一个实用程序类,用于将刷卡添加到
disclose
,并将拖放支持添加到RecyclerView
- 它与一个
RecyclerView
和一个回调类一起工作,该类配置启用的交互类型,并在用户执行这些操作时接收事件
下面是如何将ItemTouchHelper
与RecyclerView
一起使用的示例代码
堆栈活动
R.drawable.ic_最爱
可拉拔。ic_fav_白色
以上示例代码的输出
有关信息,请查看下面的文章
如果你想去任何一个图书馆,请检查这个
这是一个很好的效果,但目前还没有现成的标准方法。安卓确实提供了一套工具来创造这种效果,所以让我们看看它是如何实现的
方法
定义一个包含两层的布局:底层包含一个容纳心形的容器。这是将被激活的心脏。顶层将是向右滑动以显示底层的层
为心脏创建动画。下面我将介绍一种基于azizbekian对堆栈溢出问题的回答创建“心跳”动画的方法
创建一个扩展类:在该类中,您需要覆盖onchildraw()
,以处理在上述1)布局中设置的滑动面板的移动onchildraw()
也是执行动画的好地方。当滑动视图滑动到您将定义的“触发点”时,将触发动画。此类还有其他需要重写的方法。见下文
item_card.xml
这是针对RecyclerVIew
项的两层布局。这里我使用的是框架布局
,但也可以使用其他视图组。这就是它看起来的样子。你看到的心脏在顶层。跳动的心脏在下面。根据项目是否为收藏夹,可以将顶部心形设置为可见/不可见。下面是它的外观:
并打开(我手动设置translationX
)
onchildraw()
请参阅onchildraw()
的文档
要在ItemTouchHelper.SimpleCallback中重写的其他方法
onSelectedChanged()
和clearView
onMove()
和onsweed()
-在这些方法中不执行任何操作
IsItemViewSwipEnabled()
isLongPressDragEnabled()
还有很多细节,但这只是重要部分的概述。感谢您的详细评论。在某种程度上,这似乎是我所需要的,但不是全部。问题是,我包含的视频来自谷歌的官方材料文档,所以我希望有一些简单的东西来实现这一点。你知道当用户向左滑动时如何添加回调,以从视频中的背景创建动画吗?根据我的搜索,没有任何直接的内置方法来实现该行为,尽管它来自官方文档。它需要手动处理触摸事件并绘制触摸区域,或者在具有可单击按钮的行下显示布局。因为这需要大量的工作,所以使用现有的库是最好的。你可能会从其他答案中得到更好的库建议。至于动画本身,它很可能应用于最初隐藏的紫色背景视图。同时,心形按钮从黑色切换到白色。一旦实现了部分刷卡行为,它的实现应该相对简单。由于这是自定义行为,因此不会有任何标准回调,并且在满足条件(部分滑动)后必须触发动画。
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.helper.ItemTouchHelper;
import java.util.ArrayList;
public class StackActivity extends AppCompatActivity {
RecyclerView myRecyclerView;
private ArrayList<ItemModel> arrayList = new ArrayList<>();
FavAdapter favAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_stack);
myRecyclerView = findViewById(R.id.myRecyclerView);
myRecyclerView.setLayoutManager(new LinearLayoutManager(this));
myRecyclerView.setHasFixedSize(true);
// here i'm adding dummy data inside list
addDataInList();
// setting adapter to RecyclerView
favAdapter = new FavAdapter(this, arrayList);
myRecyclerView.setAdapter(favAdapter);
new ItemTouchHelper(new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) {
@Override
public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
return false;
}
@Override
public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
// when user swipe thr recyclerview item to right remove item from avorite list
if (direction == ItemTouchHelper.RIGHT) {
favAdapter.addToFav(viewHolder.getAdapterPosition(), false);
}
// when user swipe thr recyclerview item to left remove item from avorite list
else if (direction == ItemTouchHelper.LEFT) {
favAdapter.addToFav(viewHolder.getAdapterPosition(), true);
}
}
}).attachToRecyclerView(myRecyclerView);
}
//method to add dummy data inside ourlist
private void addDataInList() {
arrayList.add(new ItemModel("Item 1", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 2", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 3", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 4", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 5", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 6", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 7", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 8", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 9", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 10", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 11", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 12", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 13", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 14", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 15", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 16", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 17", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 18", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 19", "https://i.stack.imgur.com/1dWdI.jpg", false));
arrayList.add(new ItemModel("Item 20", "https://i.stack.imgur.com/1dWdI.jpg", false));
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="@+id/myRecyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.bumptech.glide.request.RequestOptions;
import java.util.ArrayList;
public class FavAdapter extends RecyclerView.Adapter<FavAdapter.ViewHolder> {
private Context context;
private ArrayList<ItemModel> arrayList = new ArrayList<>();
public FavAdapter(Context context, ArrayList<ItemModel> arrayList) {
this.context = context;
this.arrayList = arrayList;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.custom_fav_layout, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
// here i'm check that if item is already added in favorite or not
//based on boolean flag i'm managed to set weather the item is in favorite or not
// this flag is also use full to keep state of out favorite when we scroll our recyclerview
holder.ivFavImage.setImageResource(arrayList.get(position).isFavorite()
? R.drawable.ic_favorite : R.drawable.ic_fav_white);
holder.tvProductName.setText(arrayList.get(position).getItemName());
Glide.with(context)
.load(arrayList.get(position).getImageUrl())
.apply(new RequestOptions().
placeholder(R.drawable.ic_placeholder)
.error(R.drawable.ic_error))
.into(holder.ivProductImage);
}
// this method is used to add or remove item from favorite list when use swipe the recyclerview item using ItemTouchHelper
public void addToFav(int position, boolean flag) {
arrayList.get(position).setFavorite(flag);
notifyDataSetChanged();
}
@Override
public int getItemCount() {
return arrayList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
ImageView ivProductImage, ivFavImage;
TextView tvProductName;
public ViewHolder(View itemView) {
super(itemView);
ivProductImage = itemView.findViewById(R.id.ivProductImage);
ivFavImage = itemView.findViewById(R.id.ivFavImage);
tvProductName = itemView.findViewById(R.id.tvProductName);
ivFavImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (arrayList.get(getAdapterPosition()).isFavorite()) {
arrayList.get(getAdapterPosition()).setFavorite(false);
} else {
arrayList.get(getAdapterPosition()).setFavorite(true);
}
notifyDataSetChanged();
}
});
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardElevation="5dp"
app:cardUseCompatPadding="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/ivProductImage"
android:layout_width="match_parent"
android:layout_height="150dp"
android:scaleType="fitXY"
android:adjustViewBounds="true"
android:src="@color/colorNavBar" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal">
<TextView
android:id="@+id/tvProductName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/app_name"
android:paddingStart="5dp"
android:textColor="#FFFFFF"
android:textStyle="bold" />
<ImageView
android:id="@+id/ivFavImage"
android:layout_width="50dp"
android:layout_height="50dp"
android:src="@drawable/ic_favorite" />
</LinearLayout>
</RelativeLayout>
</android.support.v7.widget.CardView>
public class ItemModel {
boolean isFavorite;
String ItemName,imageUrl;
public ItemModel( String itemName, String imageUrl,boolean isFavorite) {
this.isFavorite = isFavorite;
ItemName = itemName;
this.imageUrl = imageUrl;
}
public boolean isFavorite() {
return isFavorite;
}
public void setFavorite(boolean favorite) {
isFavorite = favorite;
}
public String getItemName() {
return ItemName;
}
public void setItemName(String itemName) {
ItemName = itemName;
}
public String getImageUrl() {
return imageUrl;
}
public void setImageUrl(String imageUrl) {
this.imageUrl = imageUrl;
}
}
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="24dp"
android:height="24dp"
android:viewportWidth="24.0"
android:viewportHeight="24.0">
<path
android:fillColor="#FF00"
android:pathData="M12,21.35l-1.45,-1.32C5.4,15.36 2,12.28 2,8.5 2,5.42 4.42,3 7.5,3c1.74,0 3.41,0.81 4.5,2.09C13.09,3.81 14.76,3 16.5,3 19.58,3 22,5.42 22,8.5c0,3.78 -3.4,6.86 -8.55,11.54L12,21.35z"/>
</vector>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="24dp"
android:height="24dp"
android:viewportWidth="24.0"
android:viewportHeight="24.0">
<path
android:fillColor="#FFFFFF"
android:pathData="M12,21.35l-1.45,-1.32C5.4,15.36 2,12.28 2,8.5 2,5.42 4.42,3 7.5,3c1.74,0 3.41,0.81 4.5,2.09C13.09,3.81 14.76,3 16.5,3 19.58,3 22,5.42 22,8.5c0,3.78 -3.4,6.86 -8.55,11.54L12,21.35z"/>
</vector>
<FrameLayout android:layout_width="match_parent"
android:layout_height="wrap_content">
<FrameLayout
android:id="@+id/heartFrame"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:visibility="gone">
<ImageView
android:id="@+id/heart"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_gravity="top|center_horizontal"
android:padding="8dp"
card_view:srcCompat="@drawable/heart" />
</FrameLayout>
<androidx.cardview.widget.CardView
android:id="@+id/slidingPanel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:visibility="visible"
card_view:cardBackgroundColor="@android:color/background_light"
card_view:cardElevation="5dp"
card_view:cardUseCompatPadding="true">
<ImageView
android:id="@+id/imageView"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="35dp"
android:paddingTop="8dp"
card_view:srcCompat="@drawable/ic_android_green_24dp" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|start"
android:paddingStart="8dp"
android:paddingBottom="8dp"
android:text="This is some text"
android:textSize="20sp" />
<ImageView
android:id="@+id/favorite"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top|start"
android:padding="8dp"
android:tint="@android:color/holo_red_dark"
card_view:srcCompat="@drawable/heart" />
</androidx.cardview.widget.CardView>
</FrameLayout>
private AnimatorSet getHeartBeatAnimation(View target) {
final float from = 1.0f;
final float to = 1.3f;
ObjectAnimator scaleX = ObjectAnimator.ofFloat(target, View.SCALE_X, from, to);
ObjectAnimator scaleY = ObjectAnimator.ofFloat(target, View.SCALE_Y, from, to);
ObjectAnimator translationZ = ObjectAnimator.ofFloat(target, View.TRANSLATION_Z, from, to);
AnimatorSet set1 = new AnimatorSet();
set1.playTogether(scaleX, scaleY, translationZ);
set1.setDuration(100);
set1.setInterpolator(new AccelerateInterpolator());
ObjectAnimator scaleXBack = ObjectAnimator.ofFloat(target, View.SCALE_X, to, from);
ObjectAnimator scaleYBack = ObjectAnimator.ofFloat(target, View.SCALE_Y, to, from);
ObjectAnimator translationZBack = ObjectAnimator.ofFloat(target, View.TRANSLATION_Z, to, from);
Path path = new Path();
path.moveTo(0.0f, 0.0f);
path.lineTo(0.5f, 1.3f);
path.lineTo(0.75f, 0.8f);
path.lineTo(1.0f, 1.0f);
PathInterpolator pathInterpolator = new PathInterpolator(path);
AnimatorSet set2 = new AnimatorSet();
set2.playTogether(scaleXBack, scaleYBack, translationZBack);
set2.setDuration(300);
set2.setInterpolator(pathInterpolator);
AnimatorSet animSet = new AnimatorSet();
animSet.playSequentially(set1, set2);
return animSet;
}
int maxRightShift = 400; // Example only. This should not be hard-coded and should be set elsewhere.
@Override
public void onChildDraw(@NonNull Canvas c, @NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder,
float dX, float dY, int actionState, boolean isCurrentlyActive) {
MyRecyclerViewAdapter.ItemViewHolder vh = (MyRecyclerViewAdapter.ItemViewHolder) viewHolder;
// Don't let the sliding view slide more than maxRightShift amount.
if (dX >= maxRightShift && mFavoriteChangedPosition == RecyclerView.NO_POSITION) {
// Capture the position that has changed. Only on change per sliding event.
mFavoriteChangedPosition = vh.getAdapterPosition();
// Trigger the animation and do, potentially, some housekeeping.
// setFavoriteActivation will have the animation set and triggered.
vh.setFavoriteActivation(!vh.isFavorite());
}
// Shift just the CardView and leave underlying views.
vh.mCardView.setTranslationX(dX);
}