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！！！
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);
//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();
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
public class PopUtils {
private View v;
private PopupWindow popupWindow;
private int[] location;
private int popupWidth;
private int popupHeight;
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);
}
public void showPop() {
popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, (location[0] + v.getWidth() / 2) - popupWidth / 2, location[1] - popupHeight);
}
public void showPopY(int offsetY) {
popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, (location[0] + v.getWidth() / 2) - popupWidth / 2, location[1] - popupHeight - offsetY);
}
public void showPopX(int offsetX) {
popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, (location[0] + v.getWidth() / 2) - popupWidth / 2 - offsetX, location[1] - popupHeight);
}
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);
}
public void dismissPop() {
if (null != popupWindow) {
popupWindow.dismiss();
}
}
}
https://blog.csdn.net/qq_35456045
https://blog.csdn.net/qq_35456045
https://blog.csdn.net/qq_35456045
作者：程忆难
