Android 安卓PopupWindow工具类

本是古典何须时尚 2023-07-15 13:06 85阅读 0赞

### 文章目录 ###

*   *  引入
     *  效果图
     *  示例使用方法
     *  相关解释
     *  工具类封装
     *  最后奉上汪姑娘的Blog

--------------------

## 引入 ##

Android在需要类似于这样的弹窗会用到PopupWindow，所以，我为此封装了PopupWindow工具类，请往下看！！！

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwODgxNjgw_size_16_color_FFFFFF_t_70]

--------------------

## 效果图 ##

![在这里插入图片描述][2020031702302144.gif]

## 示例使用方法 ##

分别有不同的效果：

在按钮上方显示

View inflate1 = LayoutInflater.from(MainActivity.this).inflate(R.layout.pop_item, null, false);
    PopUtils popUtils1 = new PopUtils(v, inflate1);
    popUtils1.showPop();

在按钮向上偏移100显示，向下改为负数即可

View inflate2 = LayoutInflater.from(MainActivity.this).inflate(R.layout.pop_item, null, false);
    PopUtils popUtils2 = new PopUtils(v, inflate2);
    popUtils2.showPopY(100);

在按钮向左偏移100显示，向右改为负数即可

View inflate3 = LayoutInflater.from(MainActivity.this).inflate(R.layout.pop_item, null, false);
    PopUtils popUtils3 = new PopUtils(v, inflate3);
    popUtils3.showPopX(100);

在按钮向上偏移100显示，向左偏移100显示，相反则改为负数即可

View inflate4 = LayoutInflater.from(MainActivity.this).inflate(R.layout.pop_item, null, false);
    PopUtils popUtils4 = new PopUtils(v, inflate4);
    popUtils4.showPopXY(100, 100);

--------------------

## 相关解释 ##

//获取View，R.layout.xxx 是PopupWindow要展示的内容
    View inflate = LayoutInflater.from(上下文Context).inflate(R.layout.xxx, null, false);
    
    //在这里写PopupWindow中的控件相关事件
    ...
    
    //实例化 
    //v：点击/长按事件传回来的View
    //inflate：PopupWindow要展示的View
    PopUtils popUtils = new PopUtils(v, inflate);
    
    //显示PopupWindow
    popUtils.showPop();

--------------------

## 工具类封装 ##

综合几点考虑而封装

*  定义PopupWindow窗口位置
 *  根据View事件位置弹出

/** * @author ThirdGoddess * @email ofmyhub@gmail.com * @Github https://github.com/ThirdGoddess * @date :2020-03-17 01:42 */
    public class PopUtils { 
    
        private View v;
        private PopupWindow popupWindow;
    
        private int[] location;
        private int popupWidth;
        private int popupHeight;
    
        /** * @param v 事件View * @param inflate 弹框item */
        PopUtils(View v, View inflate) { 
            this.v = v;
    
            popupWindow = new PopupWindow(inflate, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);
            popupWindow.setBackgroundDrawable(new BitmapDrawable());
            inflate.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
            popupWidth = inflate.getMeasuredWidth();
            popupHeight = inflate.getMeasuredHeight();
            location = new int[2];
            v.getLocationOnScreen(location);
        }
    
        /** * PopupWindow出现在事件View上方 */
        public void showPop() { 
            popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, (location[0] + v.getWidth() / 2) - popupWidth / 2, location[1] - popupHeight);
        }
    
        /** * 偏移y轴 * * @param offsetY Y轴偏移（正数上移，负数下移） */
        public void showPopY(int offsetY) { 
            popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, (location[0] + v.getWidth() / 2) - popupWidth / 2, location[1] - popupHeight - offsetY);
        }
    
        /** * 偏移x轴 * * @param offsetX X轴偏移（正数左移，负数右移） */
        public void showPopX(int offsetX) { 
            popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, (location[0] + v.getWidth() / 2) - popupWidth / 2 - offsetX, location[1] - popupHeight);
        }
    
        /** * 偏移x轴和y轴 * * @param offsetX X轴偏移（正数左移，负数右移） * @param offsetY Y轴偏移（正数上移，负数下移） */
        public void showPopXY(int offsetX, int offsetY) { 
            popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, (location[0] + v.getWidth() / 2) - popupWidth / 2 - offsetX, location[1] - popupHeight - offsetY);
        }
    
        /** * 关闭PopupWindow */
        public void dismissPop() { 
            if (null != popupWindow) { 
                popupWindow.dismiss();
            }
        }
    }

--------------------

## 最后奉上汪姑娘的Blog ##

[https://blog.csdn.net/qq\_35456045][https_blog.csdn.net_qq_35456045]  
[https://blog.csdn.net/qq\_35456045][https_blog.csdn.net_qq_35456045]  
[https://blog.csdn.net/qq\_35456045][https_blog.csdn.net_qq_35456045]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwODgxNjgw_size_16_color_FFFFFF_t_70]: /images/20230528/778f43a60e6e48d9ae546949aa4ac0f4.png
[2020031702302144.gif]: /images/20230528/1fc47b230bff4822b355baa39b103f65.png
[https_blog.csdn.net_qq_35456045]: https://blog.csdn.net/qq_35456045