引入
Android在需要類似於這樣的彈窗會用到PopupWindow，所以，我爲此封裝了PopupWindow工具類，
示例使用方法
分別有不同的效果：
在按鈕上方顯示
View inflate1 = LayoutInflater.from(MainActivity.this).inflate(R.layout.pop_item, null, false);
PopUtils popUtils1 = new PopUtils(v, inflate1);
popUtils1.showPop();
在按鈕向上偏移100顯示，向下改爲負數即可
View inflate2 = LayoutInflater.from(MainActivity.this).inflate(R.layout.pop_item, null, false);
PopUtils popUtils2 = new PopUtils(v, inflate2);
popUtils2.showPopY(100);
在按鈕向左偏移100顯示，向右改爲負數即可
View inflate3 = LayoutInflater.from(MainActivity.this).inflate(R.layout.pop_item, null, false);
PopUtils popUtils3 = new PopUtils(v, inflate3);
popUtils3.showPopX(100);
在按鈕向上偏移100顯示，向左偏移100顯示，相反則改爲負數即可
View inflate4 = LayoutInflater.from(MainActivity.this).inflate(R.layout.pop_item, null, false);
PopUtils popUtils4 = new PopUtils(v, inflate4);
popUtils4.showPopXY(100, 100);
相關解釋
//獲取View，R.layout.xxx 是PopupWindow要展示的內容
View inflate = LayoutInflater.from(上下文Context).inflate(R.layout.xxx, null, false);
//在這裏寫PopupWindow中的控件相關事件
...
//實例化
//v：點擊/長按事件傳回來的View
//inflate：PopupWindow要展示的View
PopUtils popUtils = new PopUtils(v, inflate);
//顯示PopupWindow
popUtils.showPop();
工具類封裝
綜合幾點考慮而封裝
定義PopupWindow窗口位置
根據View事件位置彈出
/**
* @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 彈框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出現在事件View上方
*/
public void showPop() {鄭州婦科醫院 http://www.0371zzkd.com/
popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, (location[0] + v.getWidth() / 2) - popupWidth / 2, location[1] - popupHeight);
}
/**
* 偏移y軸
*
* @param offsetY Y軸偏移(正數上移，負數下移)
*/
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軸
*
* @param offsetX X軸偏移(正數左移，負數右移)
*/
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軸和y軸
*
* @param offsetX X軸偏移(正數左移，負數右移)
* @param offsetY Y軸偏移(正數上移，負數下移)
*/
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);
}
/**
* 關閉PopupWindow
*/
public void dismissPop() {
if (null != popupWindow) {
popupWindow.dismiss();
}
}
}