Question

我目前有Recyclerview这个元素的实线ItemDecoration。：

但想要一个RecyclerView ItemDecoration，其风格如下：

这是我的装饰，只有实线的垂直和水平线条，没有像我的例子那样的行空间：

public class GridDividerDecoration extends RecyclerView.ItemDecoration {

    private static final int[] ATTRS = {android.R.attr.listDivider};

    private Drawable mDivider;
    private int mInsets;

    public GridDividerDecoration(Context context) {
        TypedArray a = context.obtainStyledAttributes(ATTRS);
        mDivider = a.getDrawable(0);
        a.recycle();

        mInsets = context.getResources().getDimensionPixelSize(R.dimen.card_insets);
    }

    @Override
    public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
        drawVertical(c, parent);
        drawHorizontal(c, parent);
    }

    public void drawVertical(Canvas c, RecyclerView parent) {
        if (parent.getChildCount() == 0) return;

        final int childCount = parent.getChildCount();

        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params =
                    (RecyclerView.LayoutParams) child.getLayoutParams();

            final int left = child.getLeft() - params.leftMargin - mInsets;
            final int right = child.getRight() + params.rightMargin + mInsets;
            final int top = child.getBottom() + params.bottomMargin + mInsets;
            final int bottom = top + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    public void drawHorizontal(Canvas c, RecyclerView parent) {
        final int childCount = parent.getChildCount();

        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params =
                    (RecyclerView.LayoutParams) child.getLayoutParams();

            final int left = child.getRight() + params.rightMargin + mInsets;
            final int right = left + mDivider.getIntrinsicWidth();
            final int top = child.getTop() - params.topMargin - mInsets;
            final int bottom = child.getBottom() + params.bottomMargin + mInsets;
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    @Override
    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
        outRect.set(mInsets, mInsets, mInsets, mInsets);
    }
}

任何人都可以帮助如何在行之间设置一些空格？

Answer 1

你只想略微缩短线条，这样就可以修改你的界限。

e.g：

对于垂直线，您有：

mDivider.setBounds(left, top, right, bottom);

所以只需改变这样的顶部和底部偏移：

mDivider.setBounds(left, top + 10, right, bottom - 10);

对水平线做类似的事情，但改变左右偏移。

您可以尝试实际值，直到获得所需的效果。

android水平和垂直recyclerview项目装饰

1 个答案: