📖 About This Ringtone Maker Android Source Code

Ringtone Maker is a complete, ready-to-publish Android audio editor source code written in Java using Android Studio. The app browses every audio file on the device (music, ringtones, notifications and alarms) via the modern MediaStore, lets the user search the library and open any track in a real-time waveform editor with draggable start & end markers, rewind / fast-forward / play-preview transport buttons and millisecond-accurate "Mark Start" / "Mark End" actions. The user can also record new audio directly from the device microphone. The trimmed cut is saved as MP4/AAC (.m4a) with an automatic WAV (.wav) fallback, inserted into the Android MediaStore with the modern RELATIVE_PATH + IS_PENDING flow so it appears in the system's Sound picker without any storage permission. From the post-save dialog the user can set the cut as default Ringtone / Notification / Alarm or assign it to a specific contact in one tap. 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 precise MP3 cutter / audio trimmer with a live waveform and millisecond accuracy.
• 🎙️ An in-app voice recorder so users can create ringtones from their own voice.
• 📞 One-tap "Set as default" for Ringtone / Notification / Alarm and "Assign to contact" flow.
• 🔐 Modern scoped-storage — saved cuts land in the system Sound picker with no manual permission.

✨ Key Features

🕹️ How the App Works for the End User

1. Open the app - the splash screen plays a 2 s shake animation, then the song list opens.
2. On first launch the app asks for the Audio media permission (Android 13+) and shows a clean "Allow" gate.
3. Scroll or use the search bar to find any song, ringtone, notification or alarm.
4. Tap any row to open the waveform editor.
5. Drag the green start marker and red end marker to choose the cut. Use Rewind / Play / Fast-Forward to preview, or "Mark Start" / "Mark End" to snap markers to the playhead.
6. Optional: tap the mic icon in the list toolbar to record fresh audio from the microphone and immediately trim it.
7. Tap Save in the toolbar. A dialog asks for the cut name and category (Music / Alarm / Notification / Ringtone).
8. The cut is written as .m4a (or .wav fallback) and inserted into MediaStore - it instantly shows up in the system Sound picker.
9. A post-save dialog offers "Set as Default", "Assign to Contact" or "Close". Default-ringtone flow auto-opens the Android WRITE_SETTINGS grant screen the first time.

🛠️ 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)
• Lists: AndroidX RecyclerView + custom alphabetic fast-scroller
• Audio Decode/Encode: MediaExtractor + MediaCodec (AAC) + custom WAV / MP4 header writers
• Recording: MediaRecorder (AAC inside MP4 container)
• Waveform UI: custom View + draggable MarkerView
• Contacts: ContactsContract + RingtoneManager.setActualDefaultRingtoneUri()
• Image Loading: Universal Image Loader (contact avatars)
• Circular Images: de.hdodenhof:circleimageview
• Storage: Modern MediaStore.Audio.Media with RELATIVE_PATH + IS_PENDING on Android 10+; legacy _data on Android 7-9
• Backend: None - 100% offline app
• Monetisation: Google AdMob (banner + interstitial, Mobile Ads SDK 25.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), transport icons, waveform markers, layouts, themes and colour palette.
• ✅ Working MediaStore browser with search and category badges.
• ✅ Working waveform trimmer with draggable markers, zoom, fling-scroll, live preview, transport buttons and Mark-Start / Mark-End snap.
• ✅ Working in-app voice recorder with WAV writer.
• ✅ Working Save flow that writes to MediaStore on Android 10+ and falls back to the legacy _data path on Android 7-9.
• ✅ Working "Set as default" Ringtone / Notification / Alarm flow with WRITE_SETTINGS grant.
• ✅ Working "Assign to contact" picker with circular avatars.
• ✅ Working AdMob banner + interstitial integration (Google Mobile Ads SDK 25.x).
• ✅ 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, splash duration, default trim length and save folders.
• ✅ Free future bug fixes.

⚡ Reskin & Publish on Google Play in Under an Hour

You can launch your own branded ringtone maker 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 the toolbar in one shot.
5. (Optional) Replace the transport icons - play.xml, pause.xml, skip_forward.xml, skip_backward.xml, marker drawables, microphone.xml, content_save.xml in res/drawable/.
6. (Optional) Tune the editor: SPLASH_DELAY_MS in SplashActivity.java, DEFAULT_END_POS_SEC and SKIP_MILLIS in EditRingtoneActivity.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 ringtone maker source code.
• App resellers and reskin agencies who need a quick Google Play launch.
• Music / DJ apps that want to bundle a fast MP3 cutter and trimmer.
• Caller-screen / Flash-call apps that need per-contact ringtone assignment baked in.
• Voice-memo apps that want to add a built-in voice recorder + trimmer in one screen.
• Beginners learning Android Studio with a real-world Java audio editor project (custom View, MediaCodec, MediaRecorder, MediaStore, RingtoneManager, ContactsContract).
• Educators teaching Android, MediaCodec / AAC pipeline, custom-View drawing, scoped storage, AdMob integration 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, ringtone maker android, mp3 cutter app, audio trimmer android, waveform editor, ringtone cutter source code, set ringtone android, assign ringtone to contact, mp3 to ringtone, audio recorder android, voice recorder android, android studio project, java audio editor, complete android app, reskin android app, admob integrated app, android utility template, google play ready, offline android app, mediastore android, ringtone app source code.

💬 Support

Need help with rebranding, publishing or adding a new feature (e.g. cloud ringtone packs, share-to-WhatsApp, fade-in / fade-out effects, MP3 metadata editor)? 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.

• List all music, ringtones, notifications and alarms from device.
• Search audio library by title with live filter.
• Edit music with real-time waveform editor and make ringtone.
• Draggable start & end markers with zoom, rewind, fast-forward and live playback preview.
• Mark Start / Mark End buttons to snap markers to current playhead.
• Save trimmed cut as MP4/AAC (.m4a) with automatic WAV fallback.
• Save as Music, Alarm, Notification or Ringtone category.
• Set as default ringtone or assign to specific contacts.
• Set as default notification sound from cut music.
• Set as default alarm sound from cut music.
• Record sound from microphone and set as ringtone.
• Delete saved ringtones directly from the list.
• Modern MediaStore save flow (RELATIVE_PATH + IS_PENDING) — works on Android 7 to Android 14+.
• Granular runtime permissions (READ_MEDIA_AUDIO on Android 13+).
• Edge-to-edge UI — status bar and navigation bar never overlap content.
• Material toolbar with fast scroller on song list.
• Contact picker with circular avatars for ringtone assignment.
• Admob ads integration (banner + interstitial). 64-bit supported.

Android Studio Should be Installed

JDK 17+ Should be Installed

Android SDK 36 Should be Installed

Developer Account

Admob Account

Read attach Document carefully.

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