edwardstock/minter-android-sdk-java

Simple guide to help integrate Minter's SDK within pure Java/Kotlin project

minter-android-sdk-java

Simple guide to help integrate Minter's SDK within pure Java/Kotlin project

How to use Minter Android SDK within pure Java/Kotlin project

1. Download required SDK from official bintray repository: https://bintray.com/minterteam/android

2. There are 4 files:

   • *-javadoc.jar
   • *-sources.jar
   • *.aar
   • *.pom

   You need *.aar one.

3. AAR archive is an Android Archive. It's just a zip file, you can unzip it using unzip: unzip minter-android-core.aar, or just rename aar file to zip and do it with preferred tool.

4. After extraction, there will be stored some files. You need only classes.jar. Rename this file to library name. Example: we was download minter-android-core library, unpacked minter-android-core-0.4.0.zip; find in unpacked drectory classes.jar and rename it ito minter-android-core-0.4.0.jar

5. Important thing: if you're want to sign transactions with minter-android-blockchain SDK, you MUST build or just download native JNI libraries for your system:

   • OSX (darwin): link
   • Windows (64bit): link
   • Linux: link

6. Next: as android have some own classes, you should add it to your project as mocks (dummy classes with required names): link

7. Last important thing: to use native JNI libraries, java MUST know where are they located. You can try one of variants:

   • add JVM flag -Djava.library.path=/path/to/native_libs;
   • store libraries into system's library directory:
     • Linux: /usr/local/lib or /usr/lib
     • Darwin: /usr/local/lib
     • Windows: %windir%\System32 (??? - not sure)
   • try to add lib files directly to project dir (could work on windows, but not guaranteed)

8. Example projects for pure java:

   • Gradle: link
   • Maven: link

Common problems:

• UnsatisfiedLinkageException - Java can't find native libraries