Android 给GridView添加分割线
16lz
2021-01-23
GridView添加分割线，只要重写dispatchDraw方法来进行绘制；
首先看一下效果图
代码如下：
public class LineGridVIew extends GridView{ public LineGridVIew(Context context) { super(context); // TODO Auto-generated constructor stub } public LineGridVIew(Context context, AttributeSet attrs) { super(context, attrs); } public LineGridVIew(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } @Override protected void dispatchDraw(Canvas canvas){ super.dispatchDraw(canvas); View localView1 = getChildAt(0); int column = getWidth() / localView1.getWidth(); int childCount = getChildCount(); Paint localPaint; localPaint = new Paint(); localPaint.setStyle(Paint.Style.STROKE); localPaint.setColor(getContext().getResources().getColor(R.color.grey)); for(int i = 0;i < childCount;i++){ View cellView = getChildAt(i); if((i + 1) % column == 0){ canvas.drawLine(cellView.getLeft(), cellView.getBottom(), cellView.getRight(), cellView.getBottom(), localPaint); }else if((i + 1) > (childCount - (childCount % column))){ canvas.drawLine(cellView.getRight(), cellView.getTop(), cellView.getRight(), cellView.getBottom(), localPaint); }else{ canvas.drawLine(cellView.getRight(), cellView.getTop(), cellView.getRight(), cellView.getBottom(), localPaint); canvas.drawLine(cellView.getLeft(), cellView.getBottom(), cellView.getRight(), cellView.getBottom(), localPaint); } } if(childCount % column != 0){ for(int j = 0 ;j < (column-childCount % column) ; j++){ View lastView = getChildAt(childCount - 1); canvas.drawLine(lastView.getRight() + lastView.getWidth() * j, lastView.getTop(), lastView.getRight() + lastView.getWidth()* j, lastView.getBottom(), localPaint); } } } 更多相关文章
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