我的应用程序正在使用2个本机库，我们称之为LibA.so和LibB.so.以前我的应用程序在kitkat操作系统下运行良好，没有任何问题。
现在它在Nexus 5中使用OS 5.0（棒棒糖）提供UnsatisfiedLinkError 两个.so库都在armeabi文件夹中。
所以请给我一个常用的解决方案文件夹结构。
我对android中的本机库很新。提前谢谢！
更新： 它现在工作正常。 通过更改我的LibA.so文件链接到Md5_init相关的调用获得解决方案。 在Os 5.0中谷歌已经对系统lib调用进行了一些更改 谢谢大家的支持
答案 0 :(得分：2)
从您的错误说明中我可以看到库 LibA.so 未加载，因为它使用了一些不可用的 MD5 代码 - 未链接。 例如，您可以使用其他本机共享库与在构建期间链接的MD5源（作为共享库） - 但您没有将此共享库复制到目标应用程序 libs 文件夹。
我不确定最近的Android NDK中是否包含 MD5 相关功能的实现。也可能是以前版本的某些Android系统共享库的一部分，它已从Android L中删除。
因此，您需要检查从C ++ / C代码到MD5相关函数的引用，并找到源存储/链接的位置。
我可以提供从 libc.so 导出的功能列表的链接，例如android-17和android-L： Android-17 LIBC functions vs Android-L LIBC functions
正如您可能也看到的那样 - 在L 的共享库中不存在与MD5相关的函数 - 所以我认为您必须将这些功能（MD5）的源包含到动态库中。
答案 1 :(得分：1)
更新：现在工作正常。通过更改我的LibA.so文件链接到Md5_init相关的调用获得解决方案。在Os 5.0中，google对md5_init文件的系统lib调用进行了一些更改 谢谢大家的支持
答案 2 :(得分：1)
我可以通过在我的项目中包含这3个文件并将md5.c添加到Android.mk LOCAL_SRC_FILES列表来使其工作。
md5.h，md5.c，hash.h
md5.h
/* $Heimdal: md5.h,v 1.8 2001/01/29 02:08:57 assar Exp $
$NetBSD: md5.h,v 1.1.1.4 2002/09/12 12:41:42 joda Exp $ */
#include <stdlib.h>
#include <sys/types.h>
#define MD5_DIGEST_LENGTH 16
struct md5 {
unsigned int sz[2];
u_int32_t counter[4];
unsigned char save[64];
};
typedef struct md5 MD5_CTX;
void MD5_Init (struct md5 *m);
void MD5_Update (struct md5 *m, const void *p, size_t len);
void MD5_Final (void *res, struct md5 *m); /* u_int32_t res[4] */
md5.c
/*
* Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
__RCSID("$Heimdal: md5.c,v 1.15 2001/01/29 04:33:44 assar Exp $"
"$NetBSD: md5.c,v 1.1.1.4 2002/09/12 12:41:42 joda Exp $");
#endif
#include <endian.h>
#include "md5.h"
#include "hash.h"
#define A m->counter[0]
#define B m->counter[1]
#define C m->counter[2]
#define D m->counter[3]
#define X data
void MD5_Init(struct md5 *m) {
m->sz[0] = 0;
m->sz[1] = 0;
D = 0x10325476;
C = 0x98badcfe;
B = 0xefcdab89;
A = 0x67452301;
}
#define F(x,y,z) CRAYFIX((x & y) | (~x & z))
#define G(x,y,z) CRAYFIX((x & z) | (y & ~z))
#define H(x,y,z) (x ^ y ^ z)
#define I(x,y,z) CRAYFIX(y ^ (x | ~z))
#define DOIT(a,b,c,d,k,s,i,OP) \
a = b + cshift(a + OP(b,c,d) + X[k] + (i), s)
#define DO1(a,b,c,d,k,s,i) DOIT(a,b,c,d,k,s,i,F)
#define DO2(a,b,c,d,k,s,i) DOIT(a,b,c,d,k,s,i,G)
#define DO3(a,b,c,d,k,s,i) DOIT(a,b,c,d,k,s,i,H)
#define DO4(a,b,c,d,k,s,i) DOIT(a,b,c,d,k,s,i,I)
static inline void calc(struct md5 *m, u_int32_t *data) {
u_int32_t AA, BB, CC, DD;
AA = A;
BB = B;
CC = C;
DD = D;
/* Round 1 */
DO1(A, B, C, D, 0, 7, 0xd76aa478);
DO1(D, A, B, C, 1, 12, 0xe8c7b756);
DO1(C, D, A, B, 2, 17, 0x242070db);
DO1(B, C, D, A, 3, 22, 0xc1bdceee);
DO1(A, B, C, D, 4, 7, 0xf57c0faf);
DO1(D, A, B, C, 5, 12, 0x4787c62a);
DO1(C, D, A, B, 6, 17, 0xa8304613);
DO1(B, C, D, A, 7, 22, 0xfd469501);
DO1(A, B, C, D, 8, 7, 0x698098d8);
DO1(D, A, B, C, 9, 12, 0x8b44f7af);
DO1(C, D, A, B, 10, 17, 0xffff5bb1);
DO1(B, C, D, A, 11, 22, 0x895cd7be);
DO1(A, B, C, D, 12, 7, 0x6b901122);
DO1(D, A, B, C, 13, 12, 0xfd987193);
DO1(C, D, A, B, 14, 17, 0xa679438e);
DO1(B, C, D, A, 15, 22, 0x49b40821);
/* Round 2 */
DO2(A, B, C, D, 1, 5, 0xf61e2562);
DO2(D, A, B, C, 6, 9, 0xc040b340);
DO2(C, D, A, B, 11, 14, 0x265e5a51);
DO2(B, C, D, A, 0, 20, 0xe9b6c7aa);
DO2(A, B, C, D, 5, 5, 0xd62f105d);
DO2(D, A, B, C, 10, 9, 0x2441453);
DO2(C, D, A, B, 15, 14, 0xd8a1e681);
DO2(B, C, D, A, 4, 20, 0xe7d3fbc8);
DO2(A, B, C, D, 9, 5, 0x21e1cde6);
DO2(D, A, B, C, 14, 9, 0xc33707d6);
DO2(C, D, A, B, 3, 14, 0xf4d50d87);
DO2(B, C, D, A, 8, 20, 0x455a14ed);
DO2(A, B, C, D, 13, 5, 0xa9e3e905);
DO2(D, A, B, C, 2, 9, 0xfcefa3f8);
DO2(C, D, A, B, 7, 14, 0x676f02d9);
DO2(B, C, D, A, 12, 20, 0x8d2a4c8a);
/* Round 3 */
DO3(A, B, C, D, 5, 4, 0xfffa3942);
DO3(D, A, B, C, 8, 11, 0x8771f681);
DO3(C, D, A, B, 11, 16, 0x6d9d6122);
DO3(B, C, D, A, 14, 23, 0xfde5380c);
DO3(A, B, C, D, 1, 4, 0xa4beea44);
DO3(D, A, B, C, 4, 11, 0x4bdecfa9);
DO3(C, D, A, B, 7, 16, 0xf6bb4b60);
DO3(B, C, D, A, 10, 23, 0xbebfbc70);
DO3(A, B, C, D, 13, 4, 0x289b7ec6);
DO3(D, A, B, C, 0, 11, 0xeaa127fa);
DO3(C, D, A, B, 3, 16, 0xd4ef3085);
DO3(B, C, D, A, 6, 23, 0x4881d05);
DO3(A, B, C, D, 9, 4, 0xd9d4d039);
DO3(D, A, B, C, 12, 11, 0xe6db99e5);
DO3(C, D, A, B, 15, 16, 0x1fa27cf8);
DO3(B, C, D, A, 2, 23, 0xc4ac5665);
/* Round 4 */
DO4(A, B, C, D, 0, 6, 0xf4292244);
DO4(D, A, B, C, 7, 10, 0x432aff97);
DO4(C, D, A, B, 14, 15, 0xab9423a7);
DO4(B, C, D, A, 5, 21, 0xfc93a039);
DO4(A, B, C, D, 12, 6, 0x655b59c3);
DO4(D, A, B, C, 3, 10, 0x8f0ccc92);
DO4(C, D, A, B, 10, 15, 0xffeff47d);
DO4(B, C, D, A, 1, 21, 0x85845dd1);
DO4(A, B, C, D, 8, 6, 0x6fa87e4f);
DO4(D, A, B, C, 15, 10, 0xfe2ce6e0);
DO4(C, D, A, B, 6, 15, 0xa3014314);
DO4(B, C, D, A, 13, 21, 0x4e0811a1);
DO4(A, B, C, D, 4, 6, 0xf7537e82);
DO4(D, A, B, C, 11, 10, 0xbd3af235);
DO4(C, D, A, B, 2, 15, 0x2ad7d2bb);
DO4(B, C, D, A, 9, 21, 0xeb86d391);
A += AA;
B += BB;
C += CC;
D += DD;
}
/*
* From `Performance analysis of MD5' by Joseph D. Touch <touch@isi.edu>
*/
#if !defined(__BYTE_ORDER) || !defined (__BIG_ENDIAN)
#error __BYTE_ORDER macros not defined
#endif
#if __BYTE_ORDER == __BIG_ENDIAN
static inline u_int32_t swap_u_int32_t(u_int32_t t) {
u_int32_t temp1, temp2;
temp1 = cshift(t, 16);
temp2 = temp1 >> 8;
temp1 &= 0x00ff00ff;
temp2 &= 0x00ff00ff;
temp1 <<= 8;
return temp1 | temp2;
}
#endif
struct x32 {
unsigned int a :32;
unsigned int b :32;
};
void MD5_Update(struct md5 *m, const void *v, size_t len) {
const unsigned char *p = v;
size_t old_sz = m->sz[0];
size_t offset;
m->sz[0] += len * 8;
if (m->sz[0] < old_sz)
++m->sz[1];
offset = (old_sz / 8) % 64;
while (len > 0) {
size_t l = min(len, 64 - offset);
memcpy(m->save + offset, p, l);
offset += l;
p += l;
len -= l;
if (offset == 64) {
#if __BYTE_ORDER == __BIG_ENDIAN
int i;
u_int32_t current[16];
struct x32 *u = (struct x32*) m->save;
for (i = 0; i < 8; i++) {
current[2 * i + 0] = swap_u_int32_t(u[i].a);
current[2 * i + 1] = swap_u_int32_t(u[i].b);
}
calc(m, current);
#else
calc(m, (u_int32_t*)m->save);
#endif
offset = 0;
}
}
}
void MD5_Final(void *res, struct md5 *m) {
unsigned char zeros[72];
unsigned offset = (m->sz[0] / 8) % 64;
unsigned int dstart = (120 - offset - 1) % 64 + 1;
*zeros = 0x80;
memset(zeros + 1, 0, sizeof(zeros) - 1);
zeros[dstart + 0] = (m->sz[0] >> 0) & 0xff;
zeros[dstart + 1] = (m->sz[0] >> 8) & 0xff;
zeros[dstart + 2] = (m->sz[0] >> 16) & 0xff;
zeros[dstart + 3] = (m->sz[0] >> 24) & 0xff;
zeros[dstart + 4] = (m->sz[1] >> 0) & 0xff;
zeros[dstart + 5] = (m->sz[1] >> 8) & 0xff;
zeros[dstart + 6] = (m->sz[1] >> 16) & 0xff;
zeros[dstart + 7] = (m->sz[1] >> 24) & 0xff;
MD5_Update(m, zeros, dstart + 8);
{
int i;
unsigned char *r = (unsigned char *) res;
for (i = 0; i < 4; ++i) {
r[4 * i] = m->counter[i] & 0xFF;
r[4 * i + 1] = (m->counter[i] >> 8) & 0xFF;
r[4 * i + 2] = (m->counter[i] >> 16) & 0xFF;
r[4 * i + 3] = (m->counter[i] >> 24) & 0xFF;
}
}
#if 0
{
int i;
u_int32_t *r = (u_int32_t *)res;
for (i = 0; i < 4; ++i)
r[i] = swap_u_int32_t (m->counter[i]);
}
#endif
}
hash.h
/*
* Copyright (c) 1999 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of KTH nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/* $Heimdal: hash.h,v 1.1 1999/03/22 19:16:25 joda Exp $
$NetBSD: hash.h,v 1.1.1.3 2002/09/12 12:41:42 joda Exp $ */
/* stuff in common between md4, md5, and sha1 */
#ifndef __hash_h__
#define __hash_h__
#include <stdlib.h>
#include <string.h>
#ifndef min
#define min(a,b) (((a)>(b))?(b):(a))
#endif
/* Vector Crays doesn't have a good 32-bit type, or more precisely,
int32_t as defined by <bind/bitypes.h> isn't 32 bits, and we don't
want to depend in being able to redefine this type. To cope with
this we have to clamp the result in some places to [0,2^32); no
need to do this on other machines. Did I say this was a mess?
*/
#ifdef _CRAY
#define CRAYFIX(X) ((X) & 0xffffffff)
#else
#define CRAYFIX(X) (X)
#endif
static inline u_int32_t
cshift (u_int32_t x, unsigned int n)
{
x = CRAYFIX(x);
return CRAYFIX((x << n) | (x >> (32 - n)));
}
#endif /* __hash_h__ */
答案 3 :(得分：0)
您可以从设备中提取libcrypto.so。没有必要寻找Lollipop版本。在 Android.mk 中，使用
LOCAL_LDLIBS += -lcrypto
忽略有关使用非官方库的NDK警告。您不应该使用您的APK发送此libcrypto.so，就像您不发送libm.so一样。点击此处了解详情： WARNING: …/Android.mk: non-system libraries in linker flags