Android build and signing in React Native - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to generate a release APK using Gradle.

React Native

./gradlew [1]

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Aclean

BassembleRelease

CassembleDebug

Dbuild

Attempts:

3 left

💡 Hint

Common Mistakes

Using assembleDebug instead of assembleRelease

Running clean instead of assembleRelease

Use assembleRelease to build the release APK for Android.

2fill in blank

medium

Complete the command to generate a signing key with keytool.

React Native

keytool -genkeypair -v -keystore [1] -alias my-key-alias -keyalg RSA -keysize 2048 -validity 10000

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Arelease-key.jks

Bdebug.keystore

Cmy-release-key.keystore

Dandroid.keystore

Attempts:

3 left

💡 Hint

Common Mistakes

Using debug.keystore for release signing

Using a file extension other than .keystore

The signing key is usually stored in a keystore file like my-release-key.keystore.

3fill in blank

hard

Fix the error in the Gradle signing config by completing the missing property.

React Native

signingConfigs {
    release {
        storeFile file("[1]")
        storePassword "myStorePassword"
        keyAlias "my-key-alias"
        keyPassword "myKeyPassword"
    }
}

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Amy-release-key.keystore

Bmy-release-key.jks

Crelease.keystore

Ddebug.keystore

Attempts:

3 left

💡 Hint

Common Mistakes

Using debug.keystore in release signing config

Using incorrect file path or name

The storeFile must point to the correct keystore file used for signing.

4fill in blank

hard

Fill both blanks to configure the signing config in build.gradle.

React Native

android {
    signingConfigs {
        release {
            storeFile file("[1]")
            storePassword "[2]"
            keyAlias "my-key-alias"
            keyPassword "myKeyPassword"
        }
    }
}

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Amy-release-key.keystore

BmyStorePassword

Cdebug.keystore

DdebugPassword

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing debug keystore with release signing config

Using wrong passwords

The storeFile should be the release keystore file, and storePassword is the password for that keystore.

5fill in blank

hard

Fill all three blanks to complete the release build type configuration.

React Native

android {
    buildTypes {
        release {
            signingConfig signingConfigs.[1]
            minifyEnabled [2]
            proguardFiles getDefaultProguardFile('[3]'), 'proguard-rules.pro'
        }
    }
}

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Arelease

Btrue

Cproguard-android-optimize.txt

Ddebug

Attempts:

3 left

💡 Hint

Common Mistakes

Using debug signing config for release build

Setting minifyEnabled to false for release

Using wrong ProGuard file name

The release build type uses the release signing config, enables code shrinking with true, and uses the default ProGuard file proguard-android-optimize.txt.