Gridview 中间分割线(一)

最新推荐文章于 2021-05-25 23:48:13 发布

liyihan333

最新推荐文章于 2021-05-25 23:48:13 发布

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分类专栏： android

本文链接：https://blog.youkuaiyun.com/liyihan333/article/details/78569489

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本文介绍了一个自定义的LineGridView组件，该组件实现了去除上下左右边距线的效果，并提供了详细的实现代码。通过绘制垂直和水平线条，LineGridView可以灵活地应用于各种网格布局场景。

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自定义的ridview 如下：


package com.example.administrator.expgridview05;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
import android.widget.GridView;

/**
 * Created by Administrator on 2017/11/18 0018.
 * 上下左右都没有边距线
 */

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.bg_7e7e7e));
        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);
            }
        }
    }
}


实现的效果如下图片：

 
项目地址：http://download.youkuaiyun.com/download/liyihan333/10124017