How to resize/ set the size of bitmap image using createScaledBitmap in your Android App?

In this video it shows how one can use createScaledBitmap method of Bitmap to resize or set the size of any image in the Bitmap.

In this demo it uses ImageView widget to display the raw (unscaled) and resized images.

I hope you like this video. For any questions, suggestions or appreciation please contact us at: https://programmerworld.co/contact/ or email at: programmerworld1990@gmail.com

Complete source code and other details:

package com.programmerworld.bitmapimagesize;

import static android.Manifest.permission.READ_MEDIA_IMAGES;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;

import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.storage.StorageManager;
import android.os.storage.StorageVolume;
import android.view.View;
import android.widget.ImageView;

import java.io.File;

public class MainActivity extends AppCompatActivity {
    private ImageView imageView, imageView1;
    private Bitmap bitmap, bitmap1;

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

        ActivityCompat.requestPermissions(this,
                new String[]{READ_MEDIA_IMAGES},
                PackageManager.PERMISSION_GRANTED);

        imageView = findViewById(R.id.imageView);
        imageView1 = findViewById(R.id.imageView2);

        StorageManager storageManager = (StorageManager) getSystemService(STORAGE_SERVICE);
        StorageVolume storageVolume = storageManager.getStorageVolumes().get(0); //0=internal storage
        File fileImage = new File(storageVolume.getDirectory().getPath()+"/Download/images.jpeg");
        File fileImage1 = new File(storageVolume.getDirectory().getPath()+"/Download/images1.jpeg");
        bitmap = BitmapFactory.decodeFile(fileImage.getPath());
        bitmap1 = BitmapFactory.decodeFile(fileImage1.getPath());
    }
    public void buttonRawImage(View view){
        imageView.setImageBitmap(bitmap);
        imageView1.setImageBitmap(bitmap1);
    }

    public void buttonSizedImage(View view){
        Bitmap bitmap_resize = Bitmap.createScaledBitmap(bitmap, bitmap1.getWidth(), bitmap1.getHeight(), false);
        Bitmap bitmap1_resize = Bitmap.createScaledBitmap(bitmap1, bitmap1.getWidth(), bitmap1.getHeight(), false);

        imageView.setImageBitmap(bitmap_resize);
        imageView1.setImageBitmap(bitmap1_resize);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <uses-permission android:name="android.permission.READ_MEDIA_IMAGES"/>

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/Theme.BitmapImageSize"
        tools:targetApi="31">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<?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">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginTop="80dp"
        android:onClick="buttonRawImage"
        android:text="Show Raw Image"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="141dp"
        android:layout_marginTop="74dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button"
        app:srcCompat="@drawable/ic_launcher_background" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="141dp"
        android:layout_marginTop="81dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/imageView"
        app:srcCompat="@drawable/ic_launcher_background" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="27dp"
        android:layout_marginTop="84dp"
        android:onClick="buttonSizedImage"
        android:text="Show sized Image"
        app:layout_constraintStart_toEndOf="@+id/button"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

Resized images:

Raw Images: