Android 给GridView添加分割线

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); }
        }
    }