How to show a customized Popup window near the touch location, like what we have when we use ContextMenu?

Question

Background

Seeing that it\'s not officially possible to have a context menu which has a customized view or even icons for its rows (here), I decided to create my o

Answer 1

How to set the popup window to appear near the touch location on the screen?

For this purpose, you need to find exact coordination where the user has touch the view so you need to use setOnTouchListener()

Try this way

You this PopupWindowHelper

PopupWindowHelper

import android.view.Gravity
import android.graphics.drawable.BitmapDrawable
import android.content.Context
import android.graphics.Rect
import android.view.LayoutInflater
import android.view.MotionEvent
import android.view.View
import android.widget.LinearLayout
import android.widget.PopupWindow

class PopupWindowHelper(private val ctx: Context) {
    private val tipWindow: PopupWindow?
    private val contentView: View
    private val inflater: LayoutInflater

    internal val isTooltipShown: Boolean
        get() = tipWindow != null && tipWindow.isShowing


    init {
        tipWindow = PopupWindow(ctx)

        inflater = ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
        contentView = inflater.inflate(R.layout.popup_window, null)
    }

    internal fun showToolTip(anchor: View, event: MotionEvent) {

        tipWindow!!.height = LinearLayout.LayoutParams.WRAP_CONTENT
        tipWindow.width = LinearLayout.LayoutParams.WRAP_CONTENT

        tipWindow.isOutsideTouchable = true
        tipWindow.isTouchable = true
        tipWindow.isFocusable = true
        tipWindow.setBackgroundDrawable(BitmapDrawable())

        tipWindow.contentView = contentView

        val screenPos = IntArray(2)
        anchor.getLocationOnScreen(screenPos)

        val anchorRect =
            Rect(screenPos[0], screenPos[1], screenPos[0] + anchor.width, screenPos[1] + anchor.height)

        contentView.measure(
            LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT
        )

        val contentViewHeight = contentView.measuredHeight
        val contentViewWidth = contentView.measuredWidth

        val positionX = anchorRect.centerX() - contentViewWidth / 2
        val positionY = anchorRect.bottom - anchorRect.height() / 2

        tipWindow.showAtLocation(anchor, Gravity.NO_GRAVITY, event.x.toInt(), positionY)

    }

    internal fun dismissTooltip() {
        if (tipWindow != null && tipWindow.isShowing)
            tipWindow.dismiss()
    }


}

MainActivity

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.recyclerview.widget.LinearLayoutManager
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        myRecyclerView.layoutManager=LinearLayoutManager(this)
        myRecyclerView.setHasFixedSize(true)
        myRecyclerView.adapter=DataAdapter(this)
    }
}

DataAdapter

import android.content.Context
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.recyclerview.widget.RecyclerView
import kotlinx.android.synthetic.main.row_layout.view.*
import android.view.MotionEvent
import android.view.View.OnTouchListener

class DataAdapter(context: Context) :
    RecyclerView.Adapter() {
    val mContext = context
    private var lastTouchDown: Long = 0
    private val CLICK_ACTION_THRESHHOLD = 200

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val view =
            LayoutInflater.from(mContext)
                .inflate(R.layout.row_layout, parent, false)

        view.setOnTouchListener { myView, event ->
            when (event?.action) {
                MotionEvent.ACTION_DOWN -> lastTouchDown = System.currentTimeMillis()
                MotionEvent.ACTION_UP -> if (System.currentTimeMillis() - lastTouchDown < CLICK_ACTION_THRESHHOLD) {
                    val popupWindowHelper = PopupWindowHelper(mContext)
                    myView?.let {
                        popupWindowHelper.showToolTip(
                            it
                            , event
                        )
                    }
                }
            }
            true
        }
        return ViewHolder(view)
    }

    override fun getItemCount(): Int {
        return 30
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {

        holder.tvDescription.text = "Row Description $position"
        holder.tvTitle.text = "Row Title $position"

    }

    inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        val tvTitle = itemView.tvTitle
        val tvDescription = itemView.tvDescription
    }
}

You can find complete code from my GitHub repo