参考网址：https://blog.csdn.net/u011803341/article/details/52789469
public class LineGridView extends GridView { public LineGridView(Context context) { super(context); } public LineGridView(Context context, AttributeSet attrs) { super(context, attrs); } public LineGridView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } @Override public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST); super.onMeasure(widthMeasureSpec, expandSpec); } @Override protected void dispatchDraw(Canvas canvas) { super.dispatchDraw(canvas); View localView1 = getChildAt(0); int column = getWidth() / localView1.getWidth();//列数 int childCount = getChildCount(); Paint localPaint; localPaint = new Paint(); localPaint.setStyle(Paint.Style.STROKE); localPaint.setStrokeWidth(3);//线宽 localPaint.setColor(getContext().getResources().getColor(R.color.color));//这个就是设置分割线的颜色 for (int i = 0; i < childCount; i++) { View cellView = getChildAt(i); if ((i + 1) % column == 0) {//每一行最后一个 canvas.drawLine(cellView.getLeft(), cellView.getBottom(), cellView.getRight(), cellView.getBottom(), localPaint); } else if ((i + 1) > (childCount - (childCount % column))) {//最后一行的item 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); } } } }
