问题
I cannot find out how to get rid of / solve the below errors, that occur when loading a Neural Network model using the DL4J method restoreMultiLayerNetwork using Android API >= 24:
The errors occur when the following line within the method restoreMultiLayerNetwork is called:
params = Nd4j.read(ins2);
with
InputStream ins2 = getResources().openRawResource(getResources().getIdentifier("coefficients", "raw", getPackageName()));
and
"coefficients.bin" is the coefficients file, created by the below method from DL4J, when exporting a DL4J neural network:
ModelSerializer.writeModel(model, locationToSave, saveUpdater);
Errors: Libraries not accessible for "classloader-namespace"
E/linker: library "/vendor/lib64/libcutils.so" ("/vendor/lib64/libcutils.so") needed or dlopened by "/data/app/com.arai.arai-1/lib/arm64/libjnind4jcpu.so" is not accessible for the namespace: [name="classloader-namespace", ld_library_paths="", default_library_paths="/data/app/com.arai.arai-1/lib/arm64:/system/fake-libs64:/data/app/com.arai.arai-1/base.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_dependencies_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_0_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_1_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_2_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_3_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_4_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_5_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_6_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_7_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_8_apk.apk!
library "/vendor/lib64/libutils.so" ("/vendor/lib64/libutils.so") needed or dlopened by "/data/app/com.arai.arai-1/lib/arm64/libjnind4jcpu.so" is not accessible for the namespace: [name="classloader-namespace", ld_library_paths="", default_library_paths="/data/app/com.arai.arai-1/lib/arm64:/system/fake-libs64:/data/app/com.arai.arai-1/base.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_dependencies_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_0_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_1_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_2_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_3_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_4_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_5_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_6_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_7_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_8_apk.apk!/l
W/linker: library "/system/lib64/libbinder.so" ("/system/lib64/libbinder.so") needed or dlopened by "/data/app/com.arai.arai-1/lib/arm64/libjnind4jcpu.so" is not accessible for the namespace "classloader-namespace" - the access is temporarily granted as a workaround for http://b/26394120, note that the access will be removed in future releases of Android.
E/linker: library "/vendor/lib64/libnativeloader.so" ("/vendor/lib64/libnativeloader.so") needed or dlopened by "/data/app/com.arai.arai-1/lib/arm64/libjnind4jcpu.so" is not accessible for the namespace: [name="classloader-namespace", ld_library_paths="", default_library_paths="/data/app/com.arai.arai-1/lib/arm64:/system/fake-libs64:/data/app/com.arai.arai-1/base.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_dependencies_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_0_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_1_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_2_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_3_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_4_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_5_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_6_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slice_7_apk.apk!/lib/arm64-v8a:/data/app/com.arai.arai-1/split_lib_slic
W/linker: library "/system/lib64/libandroid_runtime.so" ("/system/lib64/libandroid_runtime.so") needed or dlopened by "/data/app/com.arai.arai-1/lib/arm64/libjnind4jcpu.so" is not accessible for the namespace "classloader-namespace" - the access is temporarily granted as a workaround for http://b/26394120, note that the access will be removed in future releases of Android.
Version of Android: API >= 24
Extract from build.gradle, where ND4J dependencies are set:
android {
compileSdkVersion 26
buildToolsVersion "26.0.1"
defaultConfig {
applicationId "com.arai.arai"
minSdkVersion 15
targetSdkVersion 23
versionCode 1
versionName "1.0"
multiDexEnabled true
javaCompileOptions {
annotationProcessorOptions {
includeCompileClasspath false
}
}
buildTypes {
release {
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
buildscript {
configurations.all {
resolutionStrategy {
force 'net.sf.proguard:proguard-gradle:5.3.2'
}
}
}
packagingOptions {
exclude 'META-INF/DEPENDENCIES'
exclude 'META-INF/DEPENDENCIES.txt'
exclude 'META-INF/LICENSE'
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/license.txt'
exclude 'META-INF/NOTICE'
exclude 'META-INF/NOTICE.txt'
exclude 'META-INF/notice.txt'
exclude 'META-INF/INDEX.LIST'
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:27.1.0'
compile 'com.mcxiaoke.volley:library-aar:1.0.0'
compile 'com.android.support:design:27.1.0'
compile (group: 'org.deeplearning4j', name: 'deeplearning4j-core', version: '1.0.0-beta2') {
exclude group: 'org.bytedeco.javacpp-presets', module: 'opencv-platform'
exclude group: 'org.bytedeco.javacpp-presets', module: 'leptonica-platform'
exclude group: 'org.bytedeco.javacpp-presets', module: 'hdf5-platform'
}
compile group: 'org.nd4j', name: 'nd4j-native', version: '1.0.0-beta2'
compile group: 'org.nd4j', name: 'nd4j-native', version: '1.0.0-beta2', classifier: "android-arm"
compile group: 'org.nd4j', name: 'nd4j-native', version: '1.0.0-beta2', classifier: "android-arm64"
compile group: 'org.nd4j', name: 'nd4j-native', version: '1.0.0-beta2', classifier: "android-x86"
compile group: 'org.nd4j', name: 'nd4j-native', version: '1.0.0-beta2', classifier: "android-x86_64"
compile group: 'org.bytedeco.javacpp-presets', name: 'openblas', version: '0.3.0-1.4.2'
compile group: 'org.bytedeco.javacpp-presets', name: 'openblas', version: '0.3.0-1.4.2', classifier: "android-arm"
compile group: 'org.bytedeco.javacpp-presets', name: 'openblas', version: '0.3.0-1.4.2', classifier: "android-arm64"
compile group: 'org.bytedeco.javacpp-presets', name: 'openblas', version: '0.3.0-1.4.2', classifier: "android-x86"
compile group: 'org.bytedeco.javacpp-presets', name: 'openblas', version: '0.3.0-1.4.2', classifier: "android-x86_64"
compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.4.2-1.4.2'
compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.4.2-1.4.2', classifier: "android-arm"
compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.4.2-1.4.2', classifier: "android-arm64"
compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.4.2-1.4.2', classifier: "android-x86"
compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.4.2-1.4.2', classifier: "android-x86_64"
compile group: 'org.bytedeco.javacpp-presets', name: 'leptonica', version: '1.76.0-1.4.2'
compile group: 'org.bytedeco.javacpp-presets', name: 'leptonica', version: '1.76.0-1.4.2', classifier: "android-arm"
compile group: 'org.bytedeco.javacpp-presets', name: 'leptonica', version: '1.76.0-1.4.2', classifier: "android-arm64"
compile group: 'org.bytedeco.javacpp-presets', name: 'leptonica', version: '1.76.0-1.4.2', classifier: "android-x86"
compile group: 'org.bytedeco.javacpp-presets', name: 'leptonica', version: '1.76.0-1.4.2', classifier: "android-x86_64"
implementation 'com.google.code.gson:gson:2.8.2'
annotationProcessor 'org.projectlombok:lombok:1.16.16'
implementation 'com.google.code.findbugs:annotations:3.0.1', {
exclude module: 'jsr305'
exclude module: 'jcip-annotations'
}
//This corrects for a junit version conflict.
configurations.all {
resolutionStrategy.force 'junit:junit:4.12'
}
}}
来源：https://stackoverflow.com/questions/52515309/libraries-not-accessible-for-classloader-namespace-when-loading-dl4j-model-us