📖 About This Background Remover Android Source Code

Background Remover is a complete, ready-to-publish Android photo editor source code written in Java using Android Studio. The app lets the user pick any photo from the device using the modern Android Photo Picker, optionally crop it with the built-in cropper, and then erase the background using one of three tools: a manual eraser brush with a live size slider, a one-tap magic-wand auto-clear that flood-erases similar-colour pixels, and a pinch-to-zoom & pan mode for surgical precision. Every brush stroke and auto-cut supports unlimited undo / redo. The finished image is written to app-scoped storage as a transparent PNG and is browsable in a built-in swipeable gallery viewer. With AdMob banner + interstitial ads already integrated, this is one of the fastest complete Android utility apps to rebrand, reskin and upload to Google Play.

What end-users get:

• ✂️ A fast photo cut-out / PNG-maker editor that works fully offline.
• 🪄 Three tools in one screen — manual eraser, magic-wand auto-clear and zoom/pan.
• 🗂️ A built-in gallery of every transparent PNG previously saved.
• 🔐 Zero storage permission prompts on any Android version — uses the official Photo Picker.

✨ Key Features

🕹️ How the App Works for the End User

1. Open the app - the Android Photo Picker appears immediately.
2. Pick any photo from the device. The picker hands back a per-URI read grant - no permission prompt.
3. The built-in cropper opens with rotate / square / free-crop guidelines.
4. The cropped photo loads into the editor on top of a checkerboard transparency preview.
5. Pick one of three tools from the bottom bar:
   • 🪄 Magic Wand - tap the background to flood-erase similar pixels.
   • ✏️ Eraser - drag your finger to erase. Use the size slider to widen or shrink the brush.
   • 🔍 Zoom - pinch & pan up to 4x to clean fine edges (hair, fur, ears).
6. Use Undo / Redo at any time to step back and forth through every cut.
7. Tap Done. A transparent PNG is written to app-scoped storage and a success dialog offers "Load Image Again" or "Exit".
8. Tap the list icon in the top-right to browse every PNG you have ever saved in a swipeable gallery.

🛠️ Technical Specifications

• Programming Language: Java 11
• IDE: Android Studio Ladybug (2024.2) or newer
• Build System: Gradle 9.4 · AGP 9.x · Version Catalog (gradle/libs.versions.toml)
• compileSdk / targetSdk: 36 (latest)
• minSdk: 24 (Android 7.0+) - covers ~98% of active Android devices
• UI: AndroidX AppCompat, Material 3, Activity-KTX (EdgeToEdge + ActivityResult APIs)
• Image Pick: AndroidX Photo Picker (ActivityResultContracts.PickVisualMedia)
• Cropper: com.vanniktech:android-image-cropper (maintained CanHub fork)
• Zoom & Pan: com.alexvasilkov:gesture-views
• Transparency BG: com.github.duanhong169:checkerboarddrawable (JitPack)
• Image Loading: Picasso (used by the gallery viewer)
• Pager: androidx.viewpager:viewpager 1.1.x
• Storage: App-scoped getExternalFilesDir(null)/removebg/ - no permissions required on any SDK
• Backend: None - 100% offline app
• Monetisation: Google AdMob (banner + interstitial, Mobile Ads SDK 23.x)
• Output: APK and AAB (Android App Bundle) ready for Google Play

📦 What You Get In This Package

• ✅ Full Android Studio project with complete Java source code.
• ✅ All resources included: launcher icons (6 densities), tool-bar state-list drawables, layouts, themes and colour palette.
• ✅ Working manual eraser + magic-wand auto-clear + zoom/pan editor.
• ✅ Working built-in cropper (Vanniktech/CanHub fork).
• ✅ Working AdMob banner + interstitial integration (Google Mobile Ads SDK 23.x).
• ✅ Working Photo Picker flow with zero runtime permissions.
• ✅ Working FileProvider already configured for easy "Share PNG" extension.
• ✅ Detailed README.md with rebrand, reskin and Google Play publish guide.
• ✅ Inline // RESKIN: code comments showing exactly where to change AdMob IDs, package name, app name, theme colour, save folder, eraser size, magic-wand tolerance and zoom factor.
• ✅ Free future bug fixes.

⚡ Reskin & Publish on Google Play in Under an Hour

You can launch your own branded photo background-remover on Google Play very quickly:

1. Open the project in Android Studio & let Gradle sync.
2. Change the package name & applicationId in app/build.gradle (Refactor → Rename).
3. Replace the launcher icon via Image Asset Studio.
4. Re-colour the theme from res/values/colors.xml - colorPrimary drives both toolbars in one shot.
5. (Optional) Replace the tool-bar icons - 9 selector drawables in res/drawable/ with clear naming.
6. (Optional) Tune the editor: MAX_ERASER_SIZE, MAX_ZOOM in BackgroundRemoverMainActivity.java and COLOR_TOLERANCE in DrawView.java (all marked with // RESKIN:).
7. Edit 3 strings in res/values/strings.xml to set your own AdMob App ID, Banner ID and Interstitial ID.
8. Generate a signed AAB and upload to Google Play Console.

💡 No advanced coding required for the basic rebrand - everything important lives in resource files and is clearly marked with // RESKIN: comments in code. Just search the project for RESKIN to jump to every touch-point.

🎯 Perfect For

• Indie Android developers who want a complete photo background remover source code.
• App resellers and reskin agencies who need a quick Google Play launch.
• Sticker / WhatsApp-sticker maker apps - the transparent PNG output drops straight into a sticker pack.
• E-commerce sellers who want a branded product photo cut-out app for their suppliers.
• Profile-pic editor apps - bundle this remover with a frame / colour-fill feature on top.
• Beginners learning Android Studio with a real-world Java photo editor project (custom View, PorterDuff, Bitmap pipeline, AsyncTask migration, ActivityResult API).
• Educators teaching Android, Bitmap math, AdMob integration, modern Photo Picker and EdgeToEdge insets.

📋 Requirements

• Android Studio Ladybug (2024.2) or newer
• JDK 17+ (auto-provisioned by Android Studio / Gradle)
• Android SDK 36 installed
• A test device or emulator running Android 7.0+ (API 24+)
• An AdMob account for ad monetisation (optional)

🏷️ Tags

android source code, background remover android, photo cut-out app, png background eraser, transparent png maker, image editor android, magic wand eraser, photo eraser, picture editor android, android studio project, java photo editor, complete android app, reskin android app, admob integrated app, android utility template, google play ready, offline android app, photo picker android, edge to edge android, sticker maker source code.

💬 Support

Need help with rebranding, publishing or adding a new feature (e.g. share-to-WhatsApp, sticker pack export, ML-based auto-cut)? Send us a message and we will be happy to help. Free updates and bug fixes are included.

Android, Google Play, AdMob and the Android robot are trademarks of Google LLC.

• Make selected image transparent.
• Remove background from photos using auto magic-wand or manual eraser tool.
• Built-in cropper to crop and rotate the photo before editing.
• Adjustable eraser brush size with live seek-bar.
• Pinch-to-zoom and pan up to 4x for fine-edge cleaning.
• Unlimited undo and redo for every stroke and auto-cut.
• Checkerboard preview to show transparent pixels in real time.
• Save image as transparent .png file.
• List all saved images in a swipeable gallery.
• AdMob banner and

Android Studio Ladybug (2024.2) or newer should be installed

JDK 17 or higher (auto-provisioned by Android Studio)

Android SDK 36 installed via SDK Manager

Google Play Developer Account (to publish on Play Store)

AdMob Account (to monetise with banner & interstitial ads)

Basic knowledge of Java and Android Studio for reskin

Test device or emulator running Android 7.0+ (API 24+)

Read attached README.md document carefully before reskin.

Open Project in Android Studio
Replace your Icon, AdMob Ids, change
title, change package name, generate signed APK - There you Go - Upload
that new APK to your Google play console.    
Export it as Apk and publish it.