Android(安卓)PopupWindow工具类 (已解决7.1以上showAsDropDown显示MATCH的PopWindow时覆盖控件的问题)

前言

PopWindow工具类

import android.app.Activityimport android.content.Contextimport android.graphics.drawable.BitmapDrawableimport android.os.Buildimport android.view.Displayimport android.view.Gravityimport android.view.Viewimport android.view.WindowManagerimport android.widget.PopupWindow/*** * PopWindowUtil * Created by zxjie on 2021/5/17. * address:bailingkeji * describe:使用时请先调用init进行初始化,之后调用showPopWindow进行显示,该工具类采用单例设计模式 * link:https://blog.csdn.net/weixin_46603990/article/details/116987681 * https://juejin.cn/post/6963513638783205406/ * example: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - *          |   -实例化对象- *          |   private val popWindowUtil = PopWindowUtil *          | *          |   -初始化PopWindow- *          |   --设置固定大小 *          |   popWindowUtil.init(this,R.layout.pop_alert_two,295F,135F,null) *          |   --适应屏幕最大化 *          |   popWindowUtil.init(this,R.layout.pop_alert_two,PopWindowUtil.MATCH,PopWindowUtil.MATCH,null) *          |   --基于屏幕设置宽高,,Restraint中的参数只有在前者为CHANGE时才会生效,公式为 屏幕宽高－Restraint.width/height *          |   popWindowUtil.init(this,R.layout.pop_alert_two,PopWindowUtil.CHANGE,PopWindowUtil.CHANGE,Restraint(20,60)) *          |   --组合使用,宽置满,高基于屏幕设置 *          |   popWindowUtil.init(this,R.layout.pop_alert_two,PopWindowUtil.MATCH,PopWindowUtil.CHANGE,Restraint(0,60)) *          | *          |   -获取所用到的控件 *          |   val btn_ok = popWindowUtil.getViewById(R.id.btn_ok) as TextView *          | *          |   -设置点击窗口外边,窗口消失,默认为false *          |   popWindowUtil.outSideTouchable(true) *          | *          |   -获取焦点,默认为false *          |   popWindowUtil.itemClickable(true) *          | *          |   -使用默认的阴影效果,默认为false *          |   popWindowUtil.shadowShowAble(true) *          | *          |   -设置PopWindow消失监听 *          |   popWindowUtil.dismissListener = { *          |         -自定义背景 *          |      } *          | *          |   -弹出PopWindow 注意:弹出的PopWindow永远不会跃出屏幕 *          |   --基于整个屏幕居中弹出,向下偏移10dp *          |   popWindowUtil.showPopWindow(toolbar,true, Excursion(Gravity.CENTER,0,10),null) *          |   --基于整个屏幕在左上弹出,并向左偏移10dp 注意:这时候PopWindow已经显示在屏幕最左侧了,所以这个-10是无效的 *          |   popWindowUtil.showPopWindow(toolbar,true, Excursion(Gravity.LEFT or Gravity.TOP,-10,0),null) *          |   --基于整个屏幕从下方滑动弹出,并在tabLayout上方 *          |   popWindowUtil.showPopWindow(tab_layout, true, Excursion(Gravity.BOTTOM, 0, DensityUtil.px2dip(this, (tab_layout.layoutParams.height+nbHeight-4) * 1F)), *          |   --注意偏移的方向并不是正右下,负左上,它是根据位置约束来决定的,位置约束为BOTTOM,那么就是正上,负下,如果为TOP,就是正下,负上,x轴同理 *          |   --不建议使用 基于toolbar控件的左下弹出 注意:为false时位置约束(Gravity.CENTER)将会失效 *          |   popWindowUtil.showPopWindow(toolbar,false, Excursion(Gravity.CENTER,0,0),null) *          | *          |   -建议设置PopWindow弹出时按返回键关闭PopWindow,而不是关闭Activity,注意:onBackPressed()方法只有在Activity中才能重写 *          |   override fun onBackPressed() { *          |        if (!popWindowUtil.disMiss()) finish() *          |        } *          | *          |   -关闭PopWindow *          |   popWindowUtil.disMiss() *          | *          |   -销毁PopWindow所使用的的对象,在onDestroy调用 *          |   popWindowUtil.destroy() *          | *          |   -当工具类提供的方法不满足你的需求时可以调用以下方法获取PopWindow对象 *          |   popWindowUtil.getPopWindow() *          |- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */object PopWindowUtil {         private var winHeight: Int = 0    private var winWidth: Int = 0    private var view: View? = null    private var popupWindow: PopupWindow? = null    private var context: Context? = null    private var canDown: Boolean = false    private var canClick: Boolean = false    private var canShow: Boolean = false    private var ERROR: Boolean = false    const val MATCH = -100F    const val CHANGE = -1000F    /***     * @param context 上下文     * @param layoutId 资源文件     * @param width PopWindow所需宽/dp 为MATCH时全屏 为CHANGE时可设置距屏幕的距离     * @param height PopWindow所需高/dp 为MATCH时全屏 为CHANGE时可设置距屏幕的距离     * @param restraint 该参数可为空,宽高非CHANGE情况下无效,当width为CHANGE时Restraint.width生效,即PopWindow距屏幕左右的距离/dp,     * 当height为CHANGE时Restraint.height生效,即PopWindow距屏幕上下的距离/dp     */    fun init(context: Context, layoutId: Int, width: Float, height: Float, restraint: Restraint?) {             this.context = context        if (isExist()) {                 popupWindow!!.dismiss()            popupWindow = null        }        val wm = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager        val display: Display = wm.defaultDisplay        winHeight = display.height        winWidth = display.width        view = View.inflate(context, layoutId, null)        val useWidth = when (width) {                 MATCH -> winWidth            CHANGE -> (winWidth - dip2px(restraint!!.width))            else -> dip2px(width)        }        ERROR = height == MATCH        val useHeight = when {                 height == MATCH -> winHeight            width == CHANGE -> (winHeight - dip2px(restraint!!.height))            else -> dip2px(height)        }        popupWindow = PopupWindow(view, useWidth, useHeight)    }    /**     * @param id 要获取的id     * @return 返回一个view对象,需要强转为所需控件类型     */    fun getViewById(id: Int): View? =        if (isExist()) view!!.findViewById(id)        else throw NullPointerException("查找控件失败,请初始化")    /**     * @param location 一个View对象,用来约束PopWindow的位置     * @param global 是否基于屏幕弹出 true基于屏幕弹出, false基于location控件的左下方弹出, 不建议使用false     * @param excursion 参数一是位置约束,global为false时位置约束将会失效,参数二传入x轴的偏移/dp,,参数三传入y轴的偏移/dp,注意偏移的方向并不是正右下,负左上,     * 它是根据位置约束来决定的,位置约束为BOTTOM,那么就是正上,负下,如果为TOP,就是正下,负上,x轴同理     * @param anim 动画效果,选择性传入,不需要时传入空     */    fun showPopWindow(location: View, global: Boolean, excursion: Excursion, anim: Int?) {             val disPose = disPose(location)        val x = dip2px(excursion.x.toFloat())        val y = dip2px(excursion.y.toFloat())        if (isExist()) {                 if (anim != null) popupWindow?.animationStyle = anim            popupWindow?.isFocusable = canClick            if (canDown) popupWindow?.setBackgroundDrawable(BitmapDrawable())            popupWindow?.isOutsideTouchable = canDown            if (canShow) setBackgroundAlpha(0.5F)            popupWindow!!.setOnDismissListener {                     if (canShow) setBackgroundAlpha(1F)                dismissListener?.invoke()            }            if (global) {                     if (ERROR) popupWindow?.height = winHeight - disPose                popupWindow?.showAtLocation(location, excursion.gravity, x, y)            } else {                     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && ERROR) {                         val height = location.layoutParams.height                    popupWindow?.height = winHeight - (disPose + height)                    popupWindow?.showAtLocation(location, Gravity.NO_GRAVITY, 0, disPose + height)                } else popupWindow?.showAsDropDown(location, x, y)            }        } else throw NullPointerException("显示PopWindow失败,请初始化")    }    /**     * 处理7.1之上Match覆盖控件的问题     */    fun disPose(location: View): Int {             val a = IntArray(2)        location.getLocationOnScreen(a)        return a[1]    }    /**     * 关闭PopWindow弹窗     * @return 成功关闭为true,否则为false     */    fun disMiss(): Boolean =        if (isExist() && isShowing()) {                 popupWindow!!.dismiss()            true        } else false        /**     * 获取当前PopWindow对象     * @return isExist()为true时返回一个PopWindow对象 为false时抛出异常     */    fun getPopWindow() =        if (isExist()) popupWindow        else throw NullPointerException("获取PopWindow对象失败,PopWindow示例对象为空")    /**     * 设置背景     */    fun setBackgroundAlpha(bgAlpha: Float) {             val activity: Activity = context as Activity        val lp = activity.window.attributes        lp.alpha = bgAlpha        if (bgAlpha == 1f) activity.window.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)        else activity.window.addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)        activity.window.attributes = lp    }    /**     *设置是否使用自带的阴影效果     * @param canShow false 不使用, true 使用     */    fun shadowShowAble(canShow: Boolean) {             this.canShow = canShow    }    /**     * 设置是否能点击窗口外边窗口消失     * @param canDown false 不能点击消失, true 可以点击消失     */    fun outSideTouchable(canDown: Boolean) {             this.canDown = canDown    }    /**     * 设置是否获得焦点     * @param canClick false 不获取,无法点击, true 获取,可以点击     */    fun itemClickable(canClick: Boolean) {             this.canClick = canClick    }        /**     * PopWindow是否为显示状态     * @return true 显示, false 未显示     */    fun isShowing() = popupWindow!!.isShowing    /**     * PopWindow是否实例化     * @return true 已实例化, false 为空     */    fun isExist() = popupWindow != null    /**     * 将所用到的对象置空,建议调用     */    fun destroy() {             dismissListener = null        popupWindow?.dismiss()        popupWindow = null        context = null        view = null    }    /**     * 单位换算 dp转px     * @return 转为px后的数值     */    fun dip2px(dpValue: Float): Int =        (dpValue * this.context!!.resources.displayMetrics.density + 0.5f).toInt()    /**     * 通过方法变量实现接口回调     */    var dismissListener: (() -> Unit)? = null}/** * @param gravity 位置约束 参数为:Gravity.TOP,Gravity.BOTTOM,Gravity.LEFT,Gravity.RIGHT,Gravity.CENTER * @param x * @param y */data class Excursion(val gravity: Int, val x: Int, val y: Int)/** * @param width PopWindow距屏幕左右的距离 * @param height PopWindow距屏幕上下的距离 */data class Restraint(val width: Float, val height: Float)

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