How to rotate the picture in ImageView of your Android app?

This video shows the steps to rotate the pictures in the image view of your Android App. It uses the SetRotation property of the ImageView to rotate the image.

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Complete source code and other details:

package com.programmerworld.rotateimageview;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {

    private ImageView imageView;

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

        imageView = findViewById(R.id.imageView);
    }

    public void buttonRotateLeft(View view){
        imageView.setRotation(imageView.getRotation() - 90F);
    }

    public void buttonRotateRight(View view){
        imageView.setRotation(imageView.getRotation() + 90F);
    }
}

<?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">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="299dp"
        android:layout_height="273dp"
        android:layout_marginStart="56dp"
        android:layout_marginTop="228dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@mipmap/finger_foreground" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="43dp"
        android:layout_marginTop="126dp"
        android:onClick="buttonRotateLeft"
        android:text="Rotate Left"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="34dp"
        android:layout_marginTop="123dp"
        android:onClick="buttonRotateRight"
        android:text="Rotate Right"
        app:layout_constraintStart_toEndOf="@+id/button"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

Image used in this tutorial:

Image imported as an asset and used in an image view for preview:

Rotate Right:

Rotate Left: