Button Click Text Zoom IN/OUT Android Java

1/  Create A add xml_main .

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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=".MainActivity">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">



    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="ZoomControls_Task"
        android:textSize="30dp"
        android:gravity="center"
        android:textStyle="bold"
        android:textColor="#3F51B5"
        android:layout_marginTop="0dp"

        />


  



        <TextView
            android:layout_width="match_parent"
            android:layout_marginTop="40dp"
            android:layout_height="wrap_content"
            android:text=""Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
            android:textStyle="bold|italic"
            android:textColor="@color/black"
            android:background="#FF5722"
            android:id="@+id/zoomin"
            android:textSize="30sp"
            android:gravity="center"/>

    

    <ZoomControls
        android:id="@+id/simpleZoomControl"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentBottom="true"
        android:layout_marginTop="20dp"


        />
</LinearLayout>





</RelativeLayout>

2/  /MainActivity.java file −

package com.example.userinput;

import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.ZoomControls;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

public class MainActivity extends AppCompatActivity {

    private ZoomControls simpleZoomControls;

    TextView img;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_main);


        simpleZoomControls = findViewById(R.id.simpleZoomControl);
        img = findViewById(R.id.zoomin);



        simpleZoomControls.setOnZoomInClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Add your zoom in functionality here
                float x= img.getScaleX();
                float y = img.getScaleY();

                img.setScaleX((float) (x+0.1));
                img.setScaleY((float) (x+0.1));
            }
        });

        simpleZoomControls.setOnZoomOutClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Add your zoom out functionality here
                float x= img.getScaleX();
                float y = img.getScaleY();

                img.setScaleX((float) (x-0.1));
                img.setScaleY((float) (x-0.1));
            }
        });
    }
}

OUTPUT