Build Android

Prerequisites:

Stable rust toolchain.
Android SDK. The version mentioned in this build.gradle, at the targetSdkVersion field.
Android NDK. Set the environment variable ANDROID_NDK_HOME to the NDK's location.
Native development support for cargo:

cargo install cargo-ndk

Android targets for cargo:

rustup target add aarch64-linux-android armv7-linux-androideabi i686-linux-android x86_64-linux-android

Steps:

In /libs/lb/lb_external_interface run make android.
Choose one:
1. Command Line
  - In clients/android run ./gradlew assemble.
  - The APK will be located at clients/android/app/build/outputs/apk/debug.
2. Android Studio
  - Download and install Android Studio.
  - In Android Studio open Lockbook Android at the /clients/android.
  - Configure Android Studio to use the SDK installed.
  - Build the APK using the hammer button on the toolbar. Once built, the bottom information bar will give you the option to locate the APK (clients/android/app/build/outputs/apk/debug/).
  - You can also run the APK directly on your device:
    - Enable USB debugging on your Android device.
    - Connect it to the machine running Android Studio.
    - On the toolbar, you will be given the option to directly run the APK on your device.