I am developing an app requiring CPU information. I placed the cpuinfo library in the jni folder. but i got this error:
java.lang.UnsatisfiedLinkError: Couldn't load cpuinfo from loader dalvik.system.PathClassLoader[dexPath=/data/app/com.iman.marashi.deviceinfo-2.apk,libraryPath=/data/app-lib/com.iman.marashi.deviceinfo-2]: findLibrary returned null
that error got from this code:
static { try { System.loadLibrary("cpuinfo"); isAvailable = true; } catch (UnsatisfiedLinkError ule) { Log.e("Loading cpuinfo native library", "" + ule); } cpuinfo.c code:
#include <jni.h> #include <stdio.h> #include <stdlib.h> #include <cpu-features.h> #include <android/log.h> #define LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE, "jason", __VA_ARGS__) #define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG, "jason", __VA_ARGS__) #define LOGI(...) __android_log_print(ANDROID_LOG_INFO, "jason", __VA_ARGS__) #define LOGW(...) __android_log_print(ANDROID_LOG_WARN, "jason", __VA_ARGS__) #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, "jason", __VA_ARGS__) const int cpu_features_list[] = { ANDROID_CPU_ARM_FEATURE_ARMv7, ANDROID_CPU_ARM_FEATURE_VFPv3, ANDROID_CPU_ARM_FEATURE_NEON, ANDROID_CPU_ARM_FEATURE_LDREX_STREX, ANDROID_CPU_ARM_FEATURE_VFPv2, ANDROID_CPU_ARM_FEATURE_VFP_D32, ANDROID_CPU_ARM_FEATURE_VFP_FP16, ANDROID_CPU_ARM_FEATURE_VFP_FMA, ANDROID_CPU_ARM_FEATURE_NEON_FMA, ANDROID_CPU_ARM_FEATURE_IDIV_ARM, ANDROID_CPU_ARM_FEATURE_IDIV_THUMB2, ANDROID_CPU_ARM_FEATURE_iWMMXt, ANDROID_CPU_X86_FEATURE_SSSE3, ANDROID_CPU_X86_FEATURE_POPCNT, ANDROID_CPU_X86_FEATURE_MOVBE }; const char cpu_features_string_list[][20] = { "armv7", "vfpv3", "neon", "ldrex_strex", "vfpv2", "vfp_d32", "vfp_fp16", "vfp_fma", "neon_fma", "idiv_arm", "idiv_thumb2", "iwmmxt", "ssse3", "popcnt", "movbe" }; void appendString(char *strDestination, char *strSource) { strcat(strDestination, " "); strcat(strDestination, strSource); } char* get_cpu_family() { if (android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM) { return "ARM"; } else if (android_getCpuFamily() == ANDROID_CPU_FAMILY_X86) { return "X86"; } else if (android_getCpuFamily() == ANDROID_CPU_FAMILY_MIPS) { return "MIPS"; } else { return "Unknown"; } } char* get_cpu_features() { char cpu_features[256] = ""; uint64_t features = android_getCpuFeatures(); int i = 0; int features_length = sizeof(cpu_features_list) / sizeof(int); for (i = 0; i < features_length; i++) { if (features & cpu_features_list[i]) { appendString(cpu_features, cpu_features_string_list[i]); } } return cpu_features; } jstring Java_hardwareinfo_HardwareInfoActivity_getCpuFamilyFromJNI( JNIEnv* env, jobject thiz ) { return (*env)->NewStringUTF(env, get_cpu_family()); } jstring Java_hardwareinfo_HardwareInfoActivity_getCpuCountFromJNI( JNIEnv* env, jobject thiz ) { return android_getCpuCount(); } jstring Java_hardwareinfo_HardwareInfoActivity_getCpuFeaturesFromJNI( JNIEnv* env, jobject thiz ) { char buffer[256]; strlcpy(buffer, get_cpu_features(), sizeof buffer); return (*env)->NewStringUTF(env, buffer); } Application.mk code:
# Build both ARMv5TE and ARMv7-A machine code. APP_ABI := armeabi armeabi-v7a Android.mk code:
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := cpuinfo LOCAL_SRC_FILES := cpuinfo.c ifeq ($(TARGET_ARCH_ABI),armeabi-v7a) LOCAL_CFLAGS := -DHAVE_NEON=1 #LOCAL_SRC_FILES += cpuinfo-intrinsics.c.neon endif LOCAL_STATIC_LIBRARIES := cpufeatures LOCAL_LDLIBS := -llog include $(BUILD_SHARED_LIBRARY) $(call import-module,cpufeatures) 