Android中带分割线的GridView-LineGridView

在Android项目开发中，有时候需要带分割线的GridView，一般情况下是做类似九宫格的功能。有时候可以直接留出边距就可以，底部背景就可以当做分割线了。但要是设计比较刁，非得要分割线跟背景颜色不同呢，那就用LineGridView吧。

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.setColor(getContext().getResources().getColor(R.color.ddcx_color_grey2));//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);            }        }    }}

用法也很简单，你用GridView的地方替换为LineGridView，再把分割线颜色设置下就好了。