medify

Keystore Generation Instructions

⚠️ IMPORTANT: Generate Your Keystore

The keystore file is NOT included in the repository for security reasons. You need to generate it before building the release version.

Step 1: Install Java JDK (if not already installed)

macOS:

brew install openjdk@17

Or download from: https://www.oracle.com/java/technologies/downloads/

Step 2: Generate Keystore

Run this command in your terminal:

keytool -genkey -v -keystore ~/medify-upload-keystore.jks \
  -keyalg RSA -keysize 2048 -validity 10000 -alias medify-upload \
  -storepass medify2024secure -keypass medify2024secure \
  -dname "CN=Sumit Pal, OU=Medify, O=Medify, L=KOLKATA, ST=WB, C=IN"

What this creates:

File: ~/medify-upload-keystore.jks (in your home directory)
Alias: medify-upload
Password: medify2024secure (stored in android/key.properties)
Validity: 10,000 days (~27 years)

Step 3: Verify Keystore Created

Check if the keystore file exists:

ls -lh ~/medify-upload-keystore.jks

You should see:

-rw-r--r--  1 sumitpal  staff   2.5K Oct 16 10:00 /Users/sumitpal/medify-upload-keystore.jks

Step 4: Keystore Configuration (Already Done)

The following files have been configured for you:

✅ `android/key.properties`

Contains keystore credentials:

storePassword=medify2024secure
keyPassword=medify2024secure
keyAlias=medify-upload
storeFile=/Users/sumitpal/medify-upload-keystore.jks

✅ `android/app/build.gradle.kts`

Configured with:

Application ID: com.sumit.medify
Target SDK: 36
Compile SDK: 36
ProGuard optimization enabled
Release signing configuration

✅ `android/app/proguard-rules.pro`

Optimization rules for:

Code shrinking
Resource shrinking
Obfuscation
Flutter compatibility
ObjectBox compatibility

Step 5: Build Release App

After generating the keystore, build your release app:

Clean build:

fvm flutter clean
fvm flutter pub get

Build App Bundle (for Play Store):

fvm flutter build appbundle --release

Output: build/app/outputs/bundle/release/app-release.aab

Build APK (for testing):

fvm flutter build apk --release

Output: build/app/outputs/flutter-apk/app-release.apk

⚠️ SECURITY - CRITICAL INFORMATION

DO NOT:

❌ Commit keystore files to Git
❌ Share keystore files publicly
❌ Lose your keystore file
❌ Forget your keystore password

DO:

✅ Backup keystore file to secure location (Google Drive, USB, etc.)
✅ Save password in password manager
✅ Keep multiple backups
✅ Store in different physical locations

Why is this important?

Without the keystore, you CANNOT update your app on Play Store
If lost, you must publish a NEW app with a new package name
All existing users will need to uninstall and reinstall

Keystore Information Summary

Store in password manager:

App: Medify (Play Store)
Keystore File: /Users/sumitpal/medify-upload-keystore.jks
Keystore Password: medify2024secure
Key Alias: medify-upload
Key Password: medify2024secure
Application ID: com.sumit.medify

Troubleshooting

Error: “keytool: command not found”

Solution: Install Java JDK (see Step 1)

Error: “Could not find or load main class”

Solution: Ensure Java is in your PATH:

export JAVA_HOME=$(/usr/libexec/java_home)
export PATH=$JAVA_HOME/bin:$PATH

Error: “Keystore file does not exist”

Solution: Ensure you ran the keytool command and file was created at ~/medify-upload-keystore.jks

Build Error: “Signing config has not been configured”

Solution:

Ensure keystore file exists
Verify android/key.properties has correct path
Run fvm flutter clean and rebuild

What’s Been Configured

✅ Application Updates:

Application ID: Changed from com.medify.medify to com.sumit.medify
Namespace: Updated to com.sumit.medify
Target SDK: Updated to 36 (Android 15)
Compile SDK: Updated to 36
Version Code: 1
Version Name: 1.0.0

✅ Optimization Enabled:

R8 Code Shrinking: Enabled
Resource Shrinking: Enabled
ProGuard Rules: Custom rules added
Obfuscation: Enabled for release builds

✅ Size Optimization:

Expected reduction: 30-50% smaller app size

Code shrinking removes unused code
Resource shrinking removes unused resources
Obfuscation reduces method names

✅ Security:

Release builds signed with upload keystore
Debug builds use debug keystore
Key credentials not committed to Git

Next Steps

✅ Run the keytool command above to generate keystore
✅ Verify keystore file exists
✅ Build release app bundle
✅ Test release build on device
✅ Create store assets (screenshots, graphics)
✅ Upload to Play Console

Build Commands Reference

# Clean project
fvm flutter clean

# Get dependencies
fvm flutter pub get

# Analyze code
fvm flutter analyze

# Build release app bundle (Play Store)
fvm flutter build appbundle --release

# Build release APK (testing)
fvm flutter build apk --release

# Install release APK on connected device
fvm flutter install --release

# Check app size
ls -lh build/app/outputs/bundle/release/app-release.aab

Expected Build Output

Before optimization:

App size: ~40-50 MB

After optimization (with ProGuard):

App size: ~20-30 MB (30-50% reduction)
Download size on Play Store: ~10-15 MB (compressed)

Good luck with your Play Store submission! 🚀