Android 安卓PopupWindow工具类

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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！！！

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效果图

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);

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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();

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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() {
        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();
        }
    }
}

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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