Question 1

What's the difference between ProGuard and R8?

Accepted Answer

R8 is the successor to ProGuard, integrated directly into the Android Gradle Plugin (from version 3.4+). It combines shrinking, obfuscation, and optimization in a single step, making it faster and more efficient. R8 is backward-compatible with ProGuard rules and enabled by default for release builds.

Question 2

What does code obfuscation do?

Accepted Answer

Code obfuscation renames classes, methods, and fields with short, meaningless names (a, b, c) to make reverse engineering significantly harder. It also helps reduce the APK size. It is configured through the proguard-rules.pro file.

Question 3

What is the Android Keystore System?

Accepted Answer

The Android Keystore System securely stores cryptographic keys, either in hardware (TEE or Secure Element) or in a software container depending on the device. Generated keys cannot be extracted, enhancing security. It is used via KeyStore.getInstance("AndroidKeyStore") with KeyGenerator or KeyPairGenerator.

Android Security and Privacy

What's the difference between ProGuard and R8?

Antwort

What does code obfuscation do?

Antwort

What is the Android Keystore System?

Antwort

How to implement biometric authentication?

What is Certificate Pinning?

Weitere Android-Interviewthemen

Android Fundamentals

Android UI and Resources

Android Lifecycle

Android Navigation

Android Data Management

Android Networking

Android Testing

Android Gradle

Kotlin Language Essentials for Android

Room Database

Background Work

Jetpack Compose

Permissions and Device Features

Firebase for Android

Android MVVM Architecture

Advanced Android Networking

Kotlin Collections and Operators

Kotlin Coroutines and Flow

Android Dependency Injection

Android MVI Architecture

Android Clean Architecture

Android Compose Advanced

Android Performance and Monitoring

Android CI/CD and Release

Android UX and Form Factors

Android Testing Advanced

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