安卓仿豆瓣FM 卡片布局的滑动和缩放

QQ图片20211115161612.gif

这是卡片展开和收起来的样子 滑动效果和豆瓣FM1:1还原 亲测无bug
这是部分代码：
package org.android.mygdttst.douban;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.PaintFlagsDrawFilter;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;

import java.util.LinkedList;
import java.util.List;

public class IronCardView extends ViewGroup implements ICardView {
private CardAnimHelper cardAnimHelper;
private List cardItems;
private CardPositionHelper cardPositionHelper;
private Context context;
private DefaultTouchHelper iCardTouchHelper;
private boolean isAddView;
private OnClickListener onClickListener;
private CardPositionHelper cardPositionHelper2;

public void generateCard() {
}

public void handleTouchEvent(MotionEvent motionEvent) {
}

public void setNextListener(NextListener nextListener) {
}

public IronCardView(Context context) {
    super(context);
    init();
}

public IronCardView(Context context, AttributeSet attributeSet) {
    super(context, attributeSet);
    init();
}

public IronCardView(Context context, AttributeSet attributeSet, int i) {
    super(context, attributeSet, i);
    init();
}

public void init() {
    this.context = getContext();
    CardPositionHelper cardPositionHelper = new CardPositionHelper();
    this.cardPositionHelper = cardPositionHelper;
    cardPositionHelper.init(this);
    this.cardItems = this.cardPositionHelper.getCurrentCards();
    addViews();
    this.cardAnimHelper = new CardAnimHelper(this.context, this.cardPositionHelper);
    DefaultTouchHelper defaultTouchHelper = new DefaultTouchHelper(this.context, this.cardPositionHelper.getCurrentCards(), this.cardPositionHelper, this.cardAnimHelper);
    this.iCardTouchHelper = defaultTouchHelper;
    CardPositionHelper cardPositionHelper2 = this.cardPositionHelper;
    cardPositionHelper2.updateOnTouchListener(defaultTouchHelper.generateListener(cardPositionHelper2.getCardItemByZ(4).getView()));
}

public void addViews() {
    if (!this.isAddView) {
        this.isAddView = true;
        for (int i = 0; i < this.cardItems.size(); i++) {
            addView(((CardItem) this.cardItems.get(i)).getView());
        }
    }
}

public void updateVertical() {
    if (!isDoingAnimation()) {
        this.cardAnimHelper.updateToVertical();
    }
}

public void updateDiffusion() {
    if (!isDoingAnimation()) {
        this.cardAnimHelper.updateToDiffusion();
    }
}

public void updateFold() {
    if (!isDoingAnimation()) {
        this.cardAnimHelper.updateToFold();
    }
}

protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    canvas.setDrawFilter(new PaintFlagsDrawFilter(0, 3));
}

protected void onMeasure(int i, int i2) {
    int mode = MeasureSpec.getMode(i);
    int mode2 = MeasureSpec.getMode(i2);
    int size = MeasureSpec.getSize(i);
    int size2 = MeasureSpec.getSize(i2);
    measureChildren(i, i2);
    if (mode == 1073741824) {
        if (mode2 == 1073741824) {
            setMeasuredDimension(size, size2);
            return;
        }
    }
    i2 = getChildCount();
    int i3 = 0;
    int i4 = 0;
    for (int i5 = 0; i5 < i2; i5++) {
        View childAt = getChildAt(i5);
        i3 = Math.max(childAt.getMeasuredWidth(), i3);
        i4 = Math.max(childAt.getMeasuredHeight(), i4);
    }
    if (mode != 1073741824) {
        size = i3;
    }
    if (mode2 != 1073741824) {
        size2 = i4;
    }
    setMeasuredDimension(size, size2);
}

protected void onLayout(boolean z, int i, int i2, int i3, int i4) {
    int count = getChildCount();
    for (i = 0; i < count; i++) {
        View view = getChildAt(i);
        i3 = view.getMeasuredWidth();
        i4 = view.getMeasuredHeight();
        int left = view.getLeft();
        int top = view.getTop();
        view.layout(left, top, i3 + left, i4 + top);
    }
    this.cardPositionHelper.updateCardsY(this);
    addViews();
}

public DefaultTouchHelper getCardTouchHelper() {
    return this.iCardTouchHelper;
}

public void doBan() {
    this.cardAnimHelper.doBan(getCardTouchHelper());
}

public void updateData(ChannelInfo channelInfo) {
    this.cardAnimHelper.updateChannelData(channelInfo);
}

public void setSwitchEndListener(CardSwitchEndListener cardSwitchEndListener) {
    this.cardAnimHelper.setSwitchEndListener(cardSwitchEndListener);
}

public void setBanEndListener(CardBanEndListener cardBanEndListener) {
    this.cardAnimHelper.setBanEndListener(cardBanEndListener);
}

public void setCardScollBackListener(CardScrollBackListener cardScrollBackListener) {
    this.cardAnimHelper.setCardScrollBackListener(cardScrollBackListener);
}

public void setChannelTypeChangedListener(ChannelTypeChangedListener channelTypeChangedListener) {
    this.iCardTouchHelper.setChannelTypeChangedListener(channelTypeChangedListener);
}

public float getCardWidth() {
    return this.cardPositionHelper.getCardWidth();
}

public float getMiddleCardX() {
    return this.cardPositionHelper.getMiddleCardX();
}

public void setMiddleCardListener(OnClickListener onClickListener) {
    this.onClickListener = onClickListener;
    if (this.cardPositionHelper != null) {
        this.cardPositionHelper.getCardItemByZ(4).getView().setOnClickListener(onClickListener);
        this.cardPositionHelper.getCardItemByZ(1).getView().setOnClickListener(null);
    }
}

public void setMiddleCardListener(DefaultTouchHelper.MiddleCardListener middleCardListener) {

    iCardTouchHelper.setMiddleCardListener(middleCardListener);
}

public CardItem getCardItemByZ(int i) {
    return this.cardPositionHelper.getCardItemByZ(i);
}

public void initCardView(LinkedList linkedList) {
    if (linkedList != null) {
        if (linkedList.size() >= 1) {
            this.cardAnimHelper.updateChannelData((ChannelInfo) linkedList.get(0), 4);
            if (linkedList.size() >= 2) {
                this.cardAnimHelper.updateChannelData((ChannelInfo) linkedList.get(1), 1);
                if (linkedList.size() >= 3) {
                    this.cardAnimHelper.updateChannelData((ChannelInfo) linkedList.get(2), 0);
                }
            }
        }
    }
}

public boolean isDoingAnimation() {
    return this.iCardTouchHelper.getCurrentStatus() != 3;
}

}
需要的同学可以直接下载：https://download.csdn.net/download/qq_15023815/52528855