java - Android - 移动布局或动画项目到购物车

Question

我正计划创建一个动画，就像所有具有 RecyclerView 的应用程序一样。当单击“添加到购物车”时，该项目的屏幕截图和动画会通过屏幕并以购物车图标结束。
我想知道 Motion Layout是我无论如何都需要使用的东西，我知道你可以控制场景和一切，但也许还有另一种方法可以做到这一点。
场景是:
我有一个水平 ScrollView ，在一个项目中我有一个按钮，显示添加到购物车，当我按下它时，它会动画到另一个 View 添加 alpha 直到 alpha 为 0。
此动画的命名为Fly to cart动画。
有什么提示吗？

这是我的自定义 View ，我想要的是当我按下我的 RecyclerView 的一个项目的按钮时，这个确切的项目使它变小并用抛物线或其他东西甚至直线“飞”到数字 2 使项目更小并且减少 alpha 直到它到达数字 2 并消失，然后为这个 2 设置动画。当项目到达项目 2 时，它应该将第二个项目移动到第一个项目，就像项目被移除一样。
这个想法是这样的:https://www.youtube.com/watch?v=YOsz8_vkfiM&ab_channel=AravindrajPalani但不是做一个“屏幕截图”移动它自己的项目，或者我可能必须隐藏项目然后创建它的副本......我不知道

Answer 1

你的意思是这样的吗？

这是我的做法
view_card.xml

Just a typical layout there is no important code here

<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/card"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:cardBackgroundColor="#E6EFF1"
    app:cardCornerRadius="12dp"
    app:cardUseCompatPadding="true">
    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <Button
            android:id="@+id/button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="12dp"
            android:layout_marginTop="4dp"
            android:layout_marginEnd="16dp"
            android:text="Add To Cart"
            android:textSize="11sp"
            app:layout_constraintBottom_toBottomOf="@+id/imageView"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/imageView"
            app:layout_constraintTop_toBottomOf="@+id/textView"
            app:layout_constraintVertical_bias="1.0" />

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_marginStart="16dp"
            android:layout_marginTop="12dp"
            android:layout_marginBottom="12dp"
            android:src="@drawable/a2"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/textView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="AIMAN"
            android:textAlignment="center"
            android:textColor="@color/black"
            android:textSize="20dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="@+id/button"
            app:layout_constraintTop_toTopOf="@+id/imageView" />
    </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.cardview.widget.CardView>

activity_main.xml

Just a typical layout there is no important code here

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    tools:context=".MainActivity">

    <RelativeLayout
        android:id="@+id/card"
        android:layout_width="130dp"
        android:layout_height="100dp"
        android:layout_marginTop="@dimen/cardMargin"
        app:cardBackgroundColor="#EDEAF1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.943"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <ImageView
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_centerInParent="true"
            android:src="@drawable/ic_cart" />
    </RelativeLayout>


    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:clipToPadding="false"
        android:orientation="horizontal"
        android:padding="16dp"
        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/card"
        tools:listitem="@layout/view_card" />

</androidx.constraintlayout.widget.ConstraintLayout>

CustomAdapter.java
关注 remove(..)函数，当你通过函数通知时在这里 notifyItemRemoved(position)卡片移除后的动画将被应用，您无需执行任何其他操作。

    List<Drawable> list;
    CustomViewListener listener;

    public CustomAdapter() {
        list = new ArrayList<>();
    }

    public void setListener(CustomViewListener listener) {
        this.listener = listener;
    }

    public void add(Drawable drawable) {
        list.add(drawable);
        notifyDataSetChanged();
    }

    @NonNull
    @Override
    public CustomViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View inflate = LayoutInflater.from(parent.getContext()).inflate(R.layout.view_card, parent, false);
        return new CustomViewHolder(inflate, listener);
    }

    @Override
    public void onBindViewHolder(@NonNull CustomViewHolder holder, int position) {
        holder.bind(list.get(position));
    }


    @Override
    public int getItemCount() {
        return list.size();
    }

    public void remove(Drawable drawable) {
        int position = list.indexOf(drawable);
        list.remove(drawable);
        notifyItemRemoved(position);
    }

    public interface CustomViewListener {
        void onFly(View view, Drawable drawable, int x, int y, int width, int hight);
    }
}

CustomViewHolder.java
关注以下内容

initSize()获取 CardView大小女巫，我们稍后需要将其传递给临时 ImageView在 MainActivity

在 binding.button.setOnClickListener我们将得到 CardView位置，然后我们调用函数onFly将我们需要的信息传递给 MainActivity

class CustomViewHolder extends RecyclerView.ViewHolder {
    int width = 0, height = 0;
    Drawable drawable;
    CustomAdapter.CustomViewListener listener;
    ViewCardBinding binding;

    public CustomViewHolder(@NonNull View itemView, CustomAdapter.CustomViewListener listener) {
        super(itemView);
        binding = ViewCardBinding.bind(itemView);
        this.listener = listener;
        initSize();
        initEvent();
    }

    private void initSize() {
        ViewTreeObserver treeObserver = binding.card.getViewTreeObserver();
        treeObserver.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                binding.card.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                width = binding.card.getMeasuredWidth();
                height = binding.card.getMeasuredHeight();
            }
        });
    }

    public void bind(Drawable drawable) {
        this.drawable = drawable;
        binding.imageView.setImageDrawable(drawable);
        binding.card.setVisibility(View.VISIBLE);
    }

    private void initEvent() {
        binding.button.setOnClickListener(view -> {
            int[] location = new int[2];
            binding.card.getLocationInWindow(location);
            int x = location[0];
            int y = location[1];
            listener.onFly(binding.card, drawable, x, y, width, height);
            binding.card.setVisibility(View.INVISIBLE);
        });
    }
}

MainActivity.java
关注以下内容

函数内部handleAnimateTheCard(..)1- getTemporaryImageView(..)创建临时 ImageView宽度和高度为 CardView来自 RecyclerView2- loadBitmapFromView(..)在 BitMap 内绘制看起来像 CardView的RecyclerView

函数内部startAnime(..)将根据 CardView 的坐标创建您请求的动画里面RecyclerView ，以及 RelativeLayout里面MainActivty , 这里 我们有三个动画弹出然后移动卡片褪色
在第二个动画完成后，要从 RecyclerView 中移除卡片

public class MainActivity extends AppCompatActivity {
    ActivityMainBinding binding;
    CustomAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = ActivityMainBinding.inflate(getLayoutInflater());
        setContentView(binding.getRoot());
        adapter = new CustomAdapter();
        LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, true);
        binding.recyclerView.setLayoutManager(layoutManager);
        binding.recyclerView.setAdapter(adapter);
        adapter.setListener(this::handleAnimateTheCard);
        addSomeData();
    }


    void handleAnimateTheCard(View view, Drawable drawable, int x, int y, int width, int hight) {
        ImageView tempImage = getTemporaryImageView(width, hight);
        Bitmap viewBitmap = loadBitmapFromView(view);
        tempImage.setImageBitmap(viewBitmap);

        
        // here because the y value not include the toolbar and actionbar hight
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        int topOffset = dm.heightPixels - binding.getRoot().getMeasuredHeight();
        y -= topOffset;
        
        int[] location = new int[2];
        binding.card.getLocationInWindow(location);
        int cartX = location[0] - 100;
        int cartY = location[1] - topOffset;

        tempImage.setAlpha(1f);
        startAnime(tempImage, drawable, x, y, cartX, cartY);
    }

    private ImageView getTemporaryImageView(int width, int hight) {
        ImageView tempImage = new ImageView(MainActivity.this);
        binding.getRoot().addView(tempImage);
        ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(width, hight);
        tempImage.setLayoutParams(params);
        return tempImage;
    }

    private void startAnime(ImageView tempImage, Drawable drawable, int x, int y, int cartX, int cartY) {
        ObjectAnimator popAnime = ObjectAnimator.ofFloat(tempImage, "translationX", x, x);
        ObjectAnimator popAnime2 = ObjectAnimator.ofFloat(tempImage, "translationY", y, y);
        ObjectAnimator popAnime3 = ObjectAnimator.ofFloat(tempImage, "scaleY", 1f, 0.9f, 1.2f);
        ObjectAnimator popAnime4 = ObjectAnimator.ofFloat(tempImage, "scaleX", 1f, 0.9f, 1.2f);
        AnimatorSet popAnimeSet = new AnimatorSet();
        popAnimeSet.setDuration(200).playTogether(popAnime, popAnime2, popAnime3, popAnime4);

        ObjectAnimator moveAnime = ObjectAnimator.ofFloat(tempImage, "translationX", x, cartX);
        ObjectAnimator moveAnime2 = ObjectAnimator.ofFloat(tempImage, "translationY", y, cartY);
        ObjectAnimator moveAnime3 = ObjectAnimator.ofFloat(tempImage, "scaleY", 1.2f, 0.5f);
        ObjectAnimator moveAnime4 = ObjectAnimator.ofFloat(tempImage, "scaleX", 1.2f, 0.5f);
        AnimatorSet moveAnimeSet = new AnimatorSet();
        moveAnimeSet.setDuration(500).playTogether(moveAnime, moveAnime2, moveAnime3, moveAnime4);
        moveAnimeSet.setStartDelay(50);
        moveAnimeSet.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationStart(Animator animation) {
                super.onAnimationStart(animation);
                tempImage.animate().alpha(0f).setDuration(600);
            }
        });

        AnimatorSet animatorSet = new AnimatorSet();
        animatorSet.playSequentially(popAnimeSet, moveAnimeSet);
        animatorSet.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                adapter.remove(drawable);
            }
        });
        animatorSet.start();
    }

    public Bitmap loadBitmapFromView(View view) {
        Bitmap returnedBitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(returnedBitmap);
        Drawable bgDrawable = view.getBackground();
        if (bgDrawable != null)
            bgDrawable.draw(canvas);
        else
            canvas.drawColor(Color.WHITE);
        view.draw(canvas);
        return returnedBitmap;
    }


    private void addSomeData() {
        adapter.add(ContextCompat.getDrawable(this, R.drawable.a1));
        adapter.add(ContextCompat.getDrawable(this, R.drawable.a2));
        adapter.add(ContextCompat.getDrawable(this, R.drawable.a3));
    }
}