Android TextView In XML and programmatically creating in Kotlin

Android TextView Widget is a user interface element used to display Text .

In this post we will how to create TextView in xml layout and dynamically Creating In Kotlin



String

<resources>
    <string name="app_name">AndroidTextView</string>
    <string name="label">TextView</string>
    <string name="dynaamic_textview">Dynamic TextView</string>
</resources>

1. TextView In XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:context=".MainActivity"
        android:gravity="center"
        android:id="@+id/rootLayout">

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/label"
            android:textSize="22sp"/>

</LinearLayout>

2. Creating TextView programmatically in kotlin

1.  Create a object TextView . 
2.  Set LayoutParams (Width and height) .
3.  Add Text to TextView by calling setText .
4.  To set size call setTextSize ( first param for unit and second param size ).

package com.tutorialsbuzz.androidtextview

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.TypedValue
import android.view.ViewGroup
import android.widget.TextView
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

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

        val textView = TextView(this);
        textView.layoutParams =
            ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)
        textView.setText(R.string.dynaamic_textview);
        textView.setTextSize(TypedValue.COMPLEX_UNIT_SP,22f);

        rootLayout.addView(textView);

    }
}