Sunday, February 23, 2020

android kotlin - How to split string into lines

MainActivity.kt

package com.example.jetpack

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


class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val string = "Lorem Ipsum is simply dummy text \nof the" +
                " printing and typesetting industry. Lorem" +
                " Ipsum has been the industry's \nstandard dummy" +
                " text ever since \nthe 1500s, when an unknown" +
                " printer took a galley of type \nand scrambled" +
                " it to make a type specimen book."

        textView.text = string

        /*
            source: kotlinlang.org
            Splits this char sequence to a list of lines delimited by
            any of the following character sequences: CRLF, LF or CR.

            The lines returned do not include terminating line separators.
        */

        // Split string into lines
        val lines:List<String> = string.lines()

        textView.append("\n\n\nLines (${lines.size})....")
        lines.forEach {
            textView.append("\n\n" + it)
        }
    }
}
activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <TextView
        android:id="@+id/textView"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:textAppearance="@style/TextAppearance.AppCompat.Large"
        android:textColor="#2A52BE"
        android:textStyle="normal"
        android:textSize="20sp"
        android:fontFamily="sans-serif-condensed"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
More android examples