Android 商品属性SKU选择

效果图：

1.继承ViewGroup

public class SKUViewGroup extends ViewGroup {



    public SKUViewGroup(Context context, AttributeSet attrs)
    {
        super(context, attrs);
    }

    @Override
    protected LayoutParams generateLayoutParams(
            LayoutParams p)
    {
        return new MarginLayoutParams(p);
    }

    @Override
    public LayoutParams generateLayoutParams(AttributeSet attrs)
    {
        return new MarginLayoutParams(getContext(), attrs);
    }

    @Override
    protected LayoutParams generateDefaultLayoutParams()
    {
        return new MarginLayoutParams(LayoutParams.MATCH_PARENT,
                LayoutParams.MATCH_PARENT);
    }

    /**
     * 负责设置子控件的测量模式和大小 根据所有子控件设置自己的宽和高
     */
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
    {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        // 获得它的父容器为它设置的测量模式和大小
        int sizeWidth = MeasureSpec.getSize(widthMeasureSpec);
        int sizeHeight = MeasureSpec.getSize(heightMeasureSpec);
        int modeWidth = MeasureSpec.getMode(widthMeasureSpec);
        int modeHeight = MeasureSpec.getMode(heightMeasureSpec);

        // 如果是warp_content情况下，记录宽和高
        int width = 0;
        int height = 0;
        /**
         * 记录每一行的宽度，width不断取最大宽度
         */
        int lineWidth = 0;
        /**
         * 每一行的高度，累加至height
         */
        int lineHeight = 0;

        int cCount = getChildCount();

        // 遍历每个子元素
        for (int i = 0; i < cCount; i++)
        {
            View child = getChildAt(i);
            // 测量每一个child的宽和高
            measureChild(child, widthMeasureSpec, heightMeasureSpec);
            // 得到child的布局管理器
            MarginLayoutParams lp = (MarginLayoutParams) child
                    .getLayoutParams();
            // 当前子空间实际占据的宽度
            int childWidth = child.getMeasuredWidth() + lp.leftMargin
                    + lp.rightMargin;
            // 当前子空间实际占据的高度
            int childHeight = child.getMeasuredHeight() + lp.topMargin
                    + lp.bottomMargin;
            /**
             * 如果加入当前child，则超出最大宽度，则的到目前最大宽度给width，类加height 然后开启新行
             */
            if (lineWidth + childWidth > sizeWidth)
            {
                width = Math.max(lineWidth, childWidth);// 取最大的
                lineWidth = childWidth; // 重新开启新行，开始记录
                // 叠加当前高度，
                height += lineHeight;
                // 开启记录下一行的高度
                lineHeight = childHeight;
            } else
            // 否则累加值lineWidth,lineHeight取最大高度
            {
                lineWidth += childWidth;
                lineHeight = Math.max(lineHeight, childHeight);
            }
            // 如果是最后一个，则将当前记录的最大宽度和当前lineWidth做比较
            if (i == cCount - 1)
            {
                width = Math.max(width, lineWidth);
                height += lineHeight;
            }

        }
        setMeasuredDimension((modeWidth == MeasureSpec.EXACTLY) ? sizeWidth
                : width, (modeHeight == MeasureSpec.EXACTLY) ? sizeHeight
                : height);

    }
    /**
     * 存储所有的View，按行记录
     */
    private List<List<View>> mAllViews = new ArrayList<>();
    /**
     * 记录每一行的最大高度
     */
    private List<Integer> mLineHeight = new ArrayList<>();
    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b)
    {
        mAllViews.clear();
        mLineHeight.clear();

        int width = getWidth();

        int lineWidth = 0;
        int lineHeight = 0;
        // 存储每一行所有的childView
        List<View> lineViews = new ArrayList<>();
        int cCount = getChildCount();
        // 遍历所有的孩子
        for (int i = 0; i < cCount; i++)
        {
            View child = getChildAt(i);
            MarginLayoutParams lp = (MarginLayoutParams) child
                    .getLayoutParams();
            int childWidth = child.getMeasuredWidth();
            int childHeight = child.getMeasuredHeight();

            // 如果已经需要换行
            if (childWidth + lp.leftMargin + lp.rightMargin + lineWidth > width)
            {
                // 记录这一行所有的View以及最大高度
                mLineHeight.add(lineHeight);
                // 将当前行的childView保存，然后开启新的ArrayList保存下一行的childView
                mAllViews.add(lineViews);
                lineWidth = 0;// 重置行宽
                lineViews = new ArrayList<>();
            }
            /**
             * 如果不需要换行，则累加
             */
            lineWidth += childWidth + lp.leftMargin + lp.rightMargin;
            lineHeight = Math.max(lineHeight, childHeight + lp.topMargin
                    + lp.bottomMargin);
            lineViews.add(child);
        }
        // 记录最后一行
        mLineHeight.add(lineHeight);
        mAllViews.add(lineViews);

        int left = 0;
        int top = 0;
        // 得到总行数
        int lineNums = mAllViews.size();
        for (int i = 0; i < lineNums; i++)
        {
            // 每一行的所有的views
            lineViews = mAllViews.get(i);
            // 当前行的最大高度
            lineHeight = mLineHeight.get(i);

            // 遍历当前行所有的View
            for (int j = 0; j < lineViews.size(); j++)
            {
                View child = lineViews.get(j);
                if (child.getVisibility() == View.GONE)
                {
                    continue;
                }
                MarginLayoutParams lp = (MarginLayoutParams) child
                        .getLayoutParams();

                //计算childView的Marginleft,top,right,bottom
                int lc = left + lp.leftMargin;
                int tc = top + lp.topMargin;
                int rc =lc + child.getMeasuredWidth();
                int bc = tc + child.getMeasuredHeight();

                child.layout(lc, tc, rc, bc);

                left += child.getMeasuredWidth() + lp.rightMargin
                        + lp.leftMargin;
            }
            left = 0;
            top += lineHeight;
        }

    }

}

2.属性选择的适配器

public class GoodsAttrsAdapter extends BaseRecyclerAdapter<GoodsAttrsBean.AttributesBean> {

    private SKUInterface myInterface;

    private SimpleArrayMap<Integer, String> saveClick;

    private List<GoodsAttrsBean.StockGoodsBean> stockGoodsList;//商品数据集合
    private String[] selectedValue;   //选中的属性
    private TextView[][] childrenViews;    //二维 装所有属性

    private final int SELECTED = 0x100;
    private final int CANCEL = 0x101;

    public GoodsAttrsAdapter(Context ctx, List<GoodsAttrsBean.AttributesBean> list, List<GoodsAttrsBean.StockGoodsBean> stockGoodsList) {
        super(ctx, list);
        this.stockGoodsList = stockGoodsList;
        saveClick = new SimpleArrayMap<>();
        childrenViews = new TextView[list.size()][0];
        selectedValue = new String[list.size()];
        for (int i = 0; i < list.size(); i++) {
            selectedValue[i] = "";
        }
    }

    public void setSKUInterface(SKUInterface myInterface) {
        this.myInterface = myInterface;
    }

    @Override
    public int getItemLayoutId(int viewType) {
        return R.layout.item_skuattrs;
    }
private SKUViewGroup vg_skuItem;
    @Override
    public void bindData(RecyclerViewHolder holder, int position, GoodsAttrsBean.AttributesBean item) {
        TextView tv_ItemName = holder.getTextView(R.id.tv_ItemName);
        vg_skuItem = (SKUViewGroup) holder.getView(R.id.vg_skuItem);
        tv_ItemName.setText(item.getTabName());
        List<String> childrens = item.getAttributesItem();
        int childrenSize = childrens.size();
        TextView[] textViews = new TextView[childrenSize];
        for (int i = 0; i < childrenSize; i++) {
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
            params.setMargins(5, 5, 5, 0);
            TextView textView = new TextView(mContext);
            textView.setGravity(Gravity.CENTER);
            textView.setPadding(15, 5, 15, 5);
            textView.setLayoutParams(params);
            textView.setBackgroundColor(ContextCompat.getColor(mContext, R.color.saddlebrown));
            textView.setText(childrens.get(i));
            textView.setTextSize(16);
            textView.setTextColor(ContextCompat.getColor(mContext, R.color.white));
            textViews[i] = textView;
            vg_skuItem.addView(textViews[i]);
        }
        childrenViews[position] = textViews;
        initOptions();
        canClickOptions();
        getSelected();
    }

    private int focusPositionG, focusPositionC;

    private class MyOnClickListener implements View.OnClickListener {
        //点击操作 选中SELECTED   取消CANCEL
        private int operation;

        private int positionG;

        private int positionC;

        public MyOnClickListener(int operation, int positionG, int positionC) {
            this.operation = operation;
            this.positionG = positionG;
            this.positionC = positionC;
        }

        @Override
        public void onClick(View v) {
            focusPositionG = positionG;
            focusPositionC = positionC;
            String value = childrenViews[positionG][positionC].getText().toString();
            switch (operation) {
                case SELECTED:
                    saveClick.put(positionG, positionC + "");
                    selectedValue[positionG] = value;
                    myInterface.selectedAttribute(selectedValue);
                    break;
                case CANCEL:
                    saveClick.put(positionG, "");
                    for (int l = 0; l < selectedValue.length; l++) {
                        if (selectedValue[l].equals(value)) {
                            selectedValue[l] = "";
                            break;
                        }
                    }
                    myInterface.uncheckAttribute(selectedValue);
                    break;
            }
            initOptions();
            canClickOptions();
            getSelected();
        }
    }

    /**
     * 初始化选项（不可点击，焦点消失）
     */
    private void initOptions() {
        for (int y = 0; y < childrenViews.length; y++) {
            for (int z = 0; z < childrenViews[y].length; z++) {//循环所有属性
                TextView textView = childrenViews[y][z];
                textView.setEnabled(false);
                textView.setFocusable(false);
                textView.setTextColor(ContextCompat.getColor(mContext, R.color.gray));//变灰
            }
        }
    }

    /**
     * 找到符合条件的选项变为可选
     */
    private void canClickOptions() {
        for (int i = 0; i < childrenViews.length; i++) {
            for (int j = 0; j < stockGoodsList.size(); j++) {
                boolean filter = false;
                List<GoodsAttrsBean.StockGoodsBean.GoodsInfoBean> goodsInfo = stockGoodsList.get(j).getGoodsInfo();
                for (int k = 0; k < selectedValue.length; k++) {
                    if (i == k || TextUtils.isEmpty(selectedValue[k])) {
                        continue;
                    }
                    if (!selectedValue[k].equals(goodsInfo
                            .get(k).getTabValue())) {
                        filter = true;
                        break;
                    }
                }
                if (!filter) {
                    for (int n = 0; n < childrenViews[i].length; n++) {
                        TextView textView = childrenViews[i][n];//拿到所有属性TextView
                        String name = textView.getText().toString();
                        //拿到属性名称
                        if (goodsInfo.get(i).getTabValue().equals(name)) {
                            textView.setEnabled(true);//符合就变成可点击
                            textView.setFocusable(true); //设置可以获取焦点
                            //不要让焦点乱跑
                            if (focusPositionG == i && focusPositionC == n) {
                                textView.setTextColor(ContextCompat.getColor(mContext, R.color.white));//取消选择后的颜色
                                textView.setBackgroundColor(ContextCompat.getColor(mContext, R.color.saddlebrown));
                                textView.requestFocus();
                            } else {
                                textView.setTextColor(ContextCompat.getColor(mContext, R.color.white));
                                textView.setBackgroundColor(ContextCompat.getColor(mContext, R.color.saddlebrown));
                            }
                            textView.setOnClickListener(new MyOnClickListener(SELECTED, i, n));
                        }
                    }
                }
            }
        }
    }

    /**
     * 找到已经选中的选项，让其变红
     */
    private void getSelected() {
        for (int i = 0; i < childrenViews.length; i++) {
            for (int j = 0; j < childrenViews[i].length; j++) {//拿到每行属性Item
                TextView textView = childrenViews[i][j];//拿到所有属性TextView
                String value = textView.getText().toString();
                for (int m = 0; m < selectedValue.length; m++) {
                    if (selectedValue[m].equals(value)) {
                        textView.setTextColor(ContextCompat.getColor(mContext, R.color.red));
                        textView.setBackgroundColor(ContextCompat.getColor(mContext, R.color.pink));
                        textView.setOnClickListener(new MyOnClickListener(CANCEL, i, j));
                    }
                }
            }
        }
    }
}

Demo下载地址：https://download.youkuaiyun.com/download/qq_39735504/10286453