How to add TextView widget in android using Java and Kotlin

•  Open the XML layout file where you want to add the TextView widget.
• Add the following code where you want to add the TextView widget:

XML

<TextView

    android:id="@+id/textView"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:text="Hello World!" />

In your Java class file, you can access the TextView widget using the findViewById() method and set its properties programmatically. For example:

TextView textView = findViewById(R.id.textView);

textView.setText("Hello World!");

Kotlin

Open the XML layout file where you want to add the TextView widget.

Add the following code where you want to add the TextView widget:

xml

<TextView

    android:id="@+id/textView"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:text="Hello World!" />

In your Kotlin class file, you can access the TextView widget using the findViewById() method or using Kotlin Android Extensions, which allows you to access the TextView widget directly. For example:

Kotlin

val textView: TextView = findViewById(R.id.textView)

textView.text = "Hello World!"

Or, using Kotlin Android Extensions:

import kotlinx.android.synthetic.main.activity_main.*

textView.text = "Hello World!"

Note that for Kotlin Android Extensions to work, you need to enable it in your project by adding the following code to your app's build.gradle file:

 gradle

apply plugin: 'kotlin-android-extensions'