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，
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 [email protected]
* @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() {郑州妇科医院 http://www.0371zzkd.com/
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();
}
}
}