Zoom In and Out to TextView in Android

 import android.content.Context;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.TypedValue;
 import android.view.MotionEvent;
 import android.view.ScaleGestureDetector;
 import androidx.annotation.NonNull;

 public class ZoomTextView extends androidx.appcompat.widget.AppCompatTextView {
    private static final String TAG = "ZoomTextView";
    private ScaleGestureDetector mScaleDetector;

    private float mScaleFactor = 1.f;
    private float defaultSize;

    private float zoomLimit = 3.0f;


    public ZoomTextView(Context context) {
        super(context);
        initialize();
    }

    public ZoomTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initialize();
    }

    public ZoomTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initialize();
    }

    private void initialize() {
        defaultSize = getTextSize();
        mScaleDetector = new ScaleGestureDetector(getContext(), new ScaleListener());

    }

    public void setZoomLimit(float zoomLimit) {
        this.zoomLimit = zoomLimit;
    }
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
    @Override
    public boolean onTouchEvent(@NonNull MotionEvent ev) {
        super.onTouchEvent(ev);
        mScaleDetector.onTouchEvent(ev);
        return true;
    }

    private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
        @Override
        public boolean onScale(ScaleGestureDetector detector) {
            mScaleFactor *= detector.getScaleFactor();
            mScaleFactor = Math.max(1.0f, Math.min(mScaleFactor, zoomLimit));
            setTextSize(TypedValue.COMPLEX_UNIT_PX, defaultSize * mScaleFactor);
            Log.e(TAG, String.valueOf(mScaleFactor));
            return true;
        }
    } }

 <?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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity3">

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/txtcandidrootsolution"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Welcome To Candidroot Solutions"
        android:textSize="20sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
 </androidx.constraintlayout.widget.ConstraintLayout>

 import android.annotation.SuppressLint
 import android.os.Bundle
 import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity

 class MainActivity2 : AppCompatActivity() {
    @SuppressLint("MissingInflatedId")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContentView(R.layout.activity_main3)
        val mTextView = findViewById<ZoomTextView>(R.id.txtzoomtextview)
        mTextView.setText("Welcome To Candidroot Solutions")
    }
 }