Android中带分割线的GridView-MyGraidView

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public class MyGraidView extends GridView{    public MyGraidView(Context context) {        super(context);    }    public MyGraidView(Context context, AttributeSet attrs) {        super(context, attrs);    }    public MyGraidView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    @Override    protected 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.setColor(getContext().getResources().getColor(R.color.line));//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() - 20, localPaint);                canvas.drawLine(cellView.getLeft(), cellView.getBottom() , cellView.getRight(), cellView.getBottom() , localPaint);            }        }    }}
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