I have a .so file from vendor which only support "arm". Currently it works perfectly fine for my Android application. Somehow I want to separate the implementation using Android Studio module, so I can export the module as Jar following this tutorial https://www.youtube.com/watch?v=1i4I-Nph-Cw.
When I export the JAR, the build process returns an error
/Users/zoom/android-ndk-r9d/toolchains/mipsel-linux-android-4.8/prebuilt/darwin-x86_64/bin/../lib/gcc/mipsel-linux-android/4.8/../../../../mipsel-linux-android/bin/ld: skipping incompatible src/main/jniLibs/armeabi/libremote_client.so when searching for -lremote_client
/Users/zoom/android-ndk-r9d/toolchains/mipsel-linux-android-4.8/prebuilt/darwin-x86_64/bin/../lib/gcc/mipsel-linux-android/4.8/../../../../mipsel-linux-android/bin/ld: cannot find -lremote_client
collect2: error: ld returned 1 exit status
:app:linkMipsDebugRemoteDesktopSharedLibrary FAILED
FAILURE: Build failed with an exception.
The logs says that gradle was trying to build against mips but failed due the incompatible library, since I only have arm library. My question how to skip the build process against mips? Or is it possible to target ARM only architecture?
build.gradle
apply plugin: 'com.android.model.library'
model {
android {
compileSdkVersion = 23
buildToolsVersion = "22.0.1"
defaultConfig.with {
//applicationId = "com.test.remote"
minSdkVersion.apiLevel = 19
targetSdkVersion.apiLevel = 21
//versionCode = 1
//versionName = "1.0"
}
}
android.ndk {
moduleName = "remote_client"
//CFlags += "-DANDROID_NDK"
CFlags += ['-std=c99', '-fstrict-aliasing']
ldLibs += ["log", "remoted_client"]
}
android.buildTypes {
release {
minifyEnabled = false
proguardFiles += file('proguard-rules.pro')
}
}
android.sources {
main {
jni {
source {
srcDir 'src/main/jni'
}
}
jniLibs {
source {
srcDir 'src/main/jniLibs'
}
}
}
}
android.productFlavors {
create("arm") {
ndk.with {
abiFilters += "armeabi"
ldFlags += "-Lsrc/main/jniLibs/armeabi"
}
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.0.1'
}
task clearJar(type: Delete) {
delete 'mylib.jar'
}
task makeJar(type: Copy) {
from('build/intermediates/bundles/release/')
into('release/')
include('classes.jar')
rename ('classes.jar', 'mylib.jar')
}
makeJar.dependsOn(clearJar, build)
Tested on Android SDK 26, NDK 15.2
On the file app/build.gradle
:
android {
defaultConfig {
ndk {
abiFilters 'arm64-v8a'
will build only for arm64-v8a
, or for all currently non-deprecated ARM targets:
abiFilters 'arm64-v8a', 'armeabi-v7a'
ABI list currently at: https://developer.android.com/ndk/guides/abis.html
Tested on Ubuntu 17.10 host, Android Studio 3, Android SDK 26, NDK 15.2, and an Android 6.0.1 device.
Sample project on GitHub.