Android studio, gradle and NDK

Question

I am very new to this whole gradle and Android Studio support. I have managed to convert my android project to gradle using the export option.

But I am looking for some documentation or start point how to integrate the NDK build into the gradle build process.

If possible I also need some sort of "after" stage that copies the build binaries (.so files) to the asset directory.

Answer 1

1. If your project exported from eclipse,add the codes below in gradle file：

   android {
      sourceSets{
           main{
              jniLibs.srcDir['libs']  
         }  
       }
   }
   

2.If you create a project in Android studio:

create a folder named jniLibs in src/main/ ，and put your *.so files in the jniLibs folder.

And copy code as below in your gradle file ：

android {
    sourceSets{  
       main{  
         jniLibs.srcDir['jniLibs']  
      }  
    }
}

Answer 2

An elegant workaround is shown in https://groups.google.com/d/msg/adt-dev/nQobKd2Gl_8/Z5yWAvCh4h4J.

Basically you create a jar which contains "lib/armeabi/yourlib.so" and then include the jar in the build.

Answer 3

I have used ndk.dir=/usr/shareData/android-ndk-r11b // path of ndk

in local.properties file in android studio project. and add this line :
android.useDeprecatedNdk=true

in gradle.properties file in android studio project.

More information here: http://tools.android.com/tech-docs/android-ndk-preview

Answer 4

configure project in android studio from eclipse: you have to import eclipse ndk project to android studio without exporting to gradle and it works , also you need to add path of ndk in local.properties ,if shows error then add

sourceSets.main {
        jniLibs.srcDir 'src/main/libs' 
        jni.srcDirs = [] //disable automatic ndk-build callenter code here
    }

in build.gradle file then create jni folder and file using terminal and run it will work

Answer 5

now.I can load the so success!

1.add the .so file to this path

Project:

|--src |--|--main |--|--|--java |--|--|--jniLibs |--|--|--|--armeabi |--|--|--|--|--.so files

2.add this code to gradle.build

android {
splits {
    abi {
        enable true
        reset()
        include 'x86', 'x86_64', 'arm64-v8a', 'armeabi-v7a', 'armeabi'
        universalApk false
    }
}

}

3.System.loadLibrary("yousoname");

4. goodluck for you,it is ok with gradle 1.2.3