Building on Android

There are two versions: with QT and without QT.

Pre-requesties

You need to install Android SDK, NDK and QT with android support.

SDK (choose command line tools only)
NDK
QT(for QT only). Choose one for your platform for android. For example QT 5.6 under Linux would be this file

You also need Java JDK and Ant.

QT-Creator (for QT only)

Open QT-creator that should be installed with QT.
Go to Settings/Anndroid and specify correct paths to SDK and NDK. If everything is correct you will see two set avaiable:
Android for armeabi-v7a (gcc, qt) and Android for x86 (gcc, qt).

Dependencies

Take following pre-compiled binaries from PurpleI2P's repositories.

git clone https://github.com/PurpleI2P/Boost-for-Android-Prebuilt.git  
git clone https://github.com/PurpleI2P/OpenSSL-for-Android-Prebuilt.git  
git clone https://github.com/PurpleI2P/MiniUPnP-for-Android-Prebuilt.git  
git clone https://github.com/PurpleI2P/android-ifaddrs.git

Building the app with QT

Open qt/i2pd_qt/i2pd_qt.pro in the QT-creator
Change line MAIN_PATH = /path/to/libraries to an actual path where you put the dependancies to
Select appropriate project (usually armeabi-v7a) and build
You will find an .apk file in android-build/bin folder

Building the app without QT

Change line I2PD_LIBS_PATH in android/jni/Application.mk to an actual path where you put the dependancies to
Run 'ndk-build -j4' from andorid folder
Create or edit file 'local.properties'. Place 'sdk.dir=' and 'ndk.dir='
Run 'ant clean debug'

Creating release .apk

In order to create release .apk you must obtain a Java keystore file(.jks). Either you have in already, or you can generate it yourself using keytool, or from one of you existing well-know ceritificates. For example, i2pd release are signed with this certificate.
Create file 'ant.propeties'
key.store='path to keystore file'
key.alias='alias name'
key.store.password='keystore password'
key.alias.password='alias password'
Run 'ant clean release'

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