Get text on each line into array from multiline textView.

MultiLinesTextViewUtils.kt

import android.os.Build
import android.view.ViewTreeObserver
import android.widget.TextView

/**
 *Created by Amit.Bhati on 08/04/18.
 */
class MultiLinesTextViewUtils(builder: Builder) {
    private var getLines: GetLines = builder.getListener()!!

    //Builder to set textView and listener
    class Builder {
        private var textView: TextView? = null
        private var getLines: GetLines? = null

        fun setTextView(textView: TextView): Builder {
            this.textView = textView
            return this
        }

        fun setListener(getLines: GetLines): Builder {
            this.getLines = getLines
            return this
        }

        fun getListener() = this.getLines

        fun create(): MultiLinesTextViewUtils {
            val multiLinesTextViewUtils = MultiLinesTextViewUtils(this)
            multiLinesTextViewUtils.getLines(textView!!)
            return multiLinesTextViewUtils

        }
    }

    //Listener to get Lines from textView
    interface GetLines {
        fun setOnGeMultiLineListener(lines: ArrayList<CharSequence>)
    }


    fun getLines(view: TextView) {
        val lines = ArrayList<CharSequence>()

        view.getViewTreeObserver().addOnGlobalLayoutListener(object : ViewTreeObserver.OnGlobalLayoutListener {

            override fun onGlobalLayout() {

                //Remove listener once it get calls
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
                    view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                } else {
                    view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                }
                val layout = view.layout
                if (layout != null) {
                    // Get the number of lines currently in the layout
                    val count = layout.lineCount

                    // Get the text from the layout.
                    val text = layout.text

                    // Initialize a start index of 0 and iterate for all lines
                    var i = 0
                    var startIndex = 0
                    while (i < count) {
                        // Get the end index of the current line (use getLineVisibleEnd()
                        // instead if you don't want to include whitespace)
                        val endIndex = layout.getLineEnd(i)

                        // Add the subSequence between the last start index
                        // and the end index for the current line.
                        lines.add(text.subSequence(startIndex, endIndex))

                        // Update the start index, since the indices are relative
                        // to the full text.
                        startIndex = endIndex
                        i++
                    }
                }

                //Return arrayList to get all lines
                getLines.setOnGeMultiLineListener(lines)
            }

        })
    }
}

//Copy the below lines to recieve listener containing array of string 
/*MultiLinesTextViewUtils.Builder()
                .setTextView(textView)
                .setListener(object : MultiLinesTextViewUtils.GetLines {
                    override fun setOnGeMultiLineListener(lines: ArrayList<CharSequence>) {
                        //You will get all lines separately into ArrayList.

                    }
                })
                .create()*/

Multi line textView with following lines-

OutPut array-
[Text in line one
, Text in line two
, Text in line three
, Text in line four]