Android build configuration in Flutter - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the build.gradle file in Android build configuration?

The build.gradle file defines how the Android app is built, including dependencies, SDK versions, build types, and signing configurations.

beginner

What does the minSdkVersion specify in Android build configuration?

It specifies the minimum Android OS version that the app supports, ensuring the app runs only on devices with that version or higher.

intermediate

How do you define different build types like debug and release in Android build configuration?

In the build.gradle file, under buildTypes, you can configure settings like code shrinking, signing, and optimization for each build type.

intermediate

What is the role of the signingConfigs block in Android build configuration?

It defines the keys and credentials used to sign the app, which is required for release builds to verify the app's authenticity.

beginner

In Flutter, where do you find the Android build configuration files?

Inside the Flutter project, the Android build files are located in the android/app/build.gradle and android/build.gradle files.

What does targetSdkVersion control in Android build configuration?

A The minimum Android version the app supports

B The version of the Flutter SDK used

C The Android version the app is tested against and optimized for

D The version of the Android SDK used to compile the app

targetSdkVersion tells the system which Android version the app is designed to run on, enabling compatibility behavior.

Where do you specify app dependencies for Android in a Flutter project?

A In <code>pubspec.yaml</code>

B In <code>android/app/build.gradle</code>

C In <code>main.dart</code>

D In <code>settings.gradle</code>

Android-specific dependencies are declared in android/app/build.gradle. Flutter packages go in pubspec.yaml.

What is the default build type when you run flutter run?

A release

B staging

C profile

D debug

flutter run builds the app in debug mode by default for easier testing and debugging.

Which file contains the signing key information for Android release builds?

A android/key.properties

B android/gradle.properties

C android/app/build.gradle

D android/settings.gradle

Signing keys are often stored in a separate key.properties file for security and referenced in build.gradle.

What is the effect of setting minifyEnabled true in the release build type?

A Enables code shrinking and obfuscation to reduce app size

B Disables debugging features

C Increases app size for better performance

D Enables verbose logging

minifyEnabled true activates code shrinking and obfuscation to make the app smaller and harder to reverse engineer.

Explain the role of build.gradle files in configuring an Android app within a Flutter project.

Think about where Android-specific settings live and what they control.

Describe how you would prepare an Android app for release using build configuration settings.

Consider what changes from debug to release builds.