android - java.lang.UnsatisfiedLinkError : Native method not found: soundtouch. ST.setup :(IIIIFF)V at soundtouch. ST.setup(本地方法)

Question

我已经搜索过堆栈溢出，但没有一个能真正解决我的问题。

我能够为我的库构建 .so 文件并将其加载到 jniLibs 目录中。当我运行应用程序时，我得到了这个

java.lang.UnsatisfiedLinkError: Native method not found: soundtouch.ST.setup:(IIIIFF)V 在 soundtouch.ST.setup( native 方法)

我折腾了2天，还是没搞清楚问题所在。请有人指导我解决这个问题。

我在这里错过了什么？

谢谢!我的构建.gradle:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

defaultConfig {
    applicationId "com.examples.anu.soundtouchexamplewithseekbar"
    minSdkVersion 19
    targetSdkVersion 21
    versionCode 1
    versionName "1.0"

    ndk {
        moduleName "soundtouch-jni"
    }
}

buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
    }
}

sourceSets.main {
    jniLibs.srcDir 'src/main' //set .so files location to libs
    jni.srcDirs = [] //disable automatic ndk-build call
}

tasks.withType(JavaCompile) {
    compileTask -> compileTask.dependsOn ndkBuild
}

task ndkBuild(type: Exec, description: 'Compile JNI source via NDK')            {
    def ndkDir = project.plugins.findPlugin('com.android.application').getNdkFolder()

    commandLine "$ndkDir/ndk-build",
            'NDK_PROJECT_PATH=build/intermediates/ndk',
            'NDK_LIBS_OUT=src/main/jniLibs',
            'APP_BUILD_SCRIPT=src/main/jni/Android.mk',
            'NDK_APPLICATION_MK=src/main/jni/Application.mk'
    }
}

dependencies 
{
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile fileTree(include: ['*.jar'], dir: 'src/main/jniLibs')
    compile 'com.android.support:appcompat-v7:21.0.3'
}

我的 Android.mk:

LOCAL_PATH := $(call my-dir)
APP_STL := stlport_shared

include $(CLEAR_VARS)

MY_SOURCE_DIR:=soundtouch

LOCAL_MODULE:=soundtouch-jni
LOCAL_C_INCLUDES:=$(LOCAL_PATH)/soundtouch/include
LOCAL_SRC_FILES:= soundtouch_ST.cpp\
              soundtouch-jni.cpp\
               $(MY_SOURCE_DIR)/source/SoundTouch/AAFilter.cpp\

LOCAL_ARM_MODE:=arm 
LOCAL_LDLIBS+=-lz -llog

LOCAL_CFLAGS += -Wall -fvisibility=hidden -I soundtouch/source/../include -D ST_NO_EXCEPTION_HANDLING -fdata-sections -ffunction-sections 

include $(BUILD_SHARED_LIBRARY)

========部分添加我的 java 和 JNI 签名:

import android.util.Log;

public class ST implements AudioProcessor
{

    private static final int DEFAULT_BUFFER_SIZE = 2048;
   private static synchronized native final void putBytes(int track,
                                                       byte[] input,    int length);

private static synchronized native  final void setup(int track,
                                                     int channels, int samplingRate, int bytesPerSample, float tempo,float pitchSemi);

==========我的自动生成:.h 文件: /* 不要编辑这个文件 - 它是机器生成的 / ＃包括 / 类 soundtouch_ST 的标题 */

#ifndef _Included_soundtouch_ST
#define _Included_soundtouch_ST
#ifdef __cplusplus
extern "C" {
#endif
#undef soundtouch_ST_DEFAULT_BUFFER_SIZE
#define soundtouch_ST_DEFAULT_BUFFER_SIZE 2048L
/*
 * Class:     soundtouch_ST
 * Method:    clearBytes
 * Signature: (I)V
 */
 JNIEXPORT void JNICALL Java_soundtouch_ST_clearBytes
 (JNIEnv *, jclass, jint);

 /*
  * Class:     soundtouch_ST
  * Method:    finish
  * Signature: (II)V
  */
  JNIEXPORT void JNICALL Java_soundtouch_ST_finish
  (JNIEnv *, jclass, jint, jint);

  /*
  * Class:     soundtouch_ST
  * Method:    getBytes
  * Signature: (I[BI)I
  */
 JNIEXPORT jint JNICALL Java_soundtouch_ST_getBytes
  (JNIEnv *, jclass, jint, jbyteArray, jint);

 /*
  * Class:     soundtouch_ST
  * Method:    putBytes
  * Signature: (I[BI)V
  */
 JNIEXPORT void JNICALL Java_soundtouch_ST_putBytes
(JNIEnv *, jclass, jint, jbyteArray, jint);

 /*
  * Class:     soundtouch_ST
  * Method:    setup
  * Signature: (IIIIFF)V
  */
 JNIEXPORT void JNICALL Java_soundtouch_ST_setup
 (JNIEnv *, jclass, jint, jint, jint, jint, jfloat, jfloat);

====== 我的实现:soundtouch_ST.cpp

   #include "soundtouch_ST.h"
   #include "soundtouch-jni.h"

  /* cpp for class soundtouch_ST */

  #ifndef _Included_soundtouch_ST
  #define _Included_soundtouch_ST
  #ifdef __cplusplus
  extern "C" {
  SoundTouchStream sts = new SoundTouchStream();
  #endif
 / *
  * Class:     soundtouch_ST
  * Method:    clearBytes
  * Signature: (I)V
  */
  JNIEXPORT void JNICALL Java_soundtouch_ST_clearBytes
 (JNIEnv *env, jclass obj, jint track) {
    sts->clearBytes(env,obj,track);
  }

 /*
  * Class:     soundtouch_ST
  * Method:    finish
  * Signature: (II)V
  */
  JNIEXPORT void JNICALL Java_soundtouch_ST_finish
  (JNIEnv *, jclass obj, jint track, jint length){
     sts->finish(env,obj,track,length);
  }

 /*
 * Class:     soundtouch_ST
 * Method:    getBytes
 * Signature: (I[BI)I
 */
JNIEXPORT jint JNICALL Java_soundtouch_ST_getBytes
 (JNIEnv *env, jclass obj, jint a, jbyteArray x, jint b) {
 (*env)->sts->getBytes(env,obj,a,x,b);
 }

/*
 * Class:     soundtouch_ST
 * Method:    putBytes
 * Signature: (I[BI)V
 */
 JNIEXPORT void JNICALL Java_soundtouch_ST_putBytes
 (JNIEnv *env, jclass obj, jint a, jbyteArray x, jint b) {
  sts->putBytes(env,obj,a,x,b);
 }

/*
 * Class:     soundtouch_ST
 * Method:    setup
 * Signature: (IIIIFF)V
 */
JNIEXPORT void JNICALL Java_soundtouch_ST_setup
(JNIEnv *env, jclass obj, jint a, jint b, jint c, jint d, jfloat f,    jfloat g) {
 sts->setup(env,obj,a,b,c,d,f,g)
  }

Answer 1

它是以下之一:

1) 不包括您的图书馆。解压缩 apk 并确保它在里面。

2)你没有加载.so文件

3)C 端和 Java 端的 JNI 函数签名不匹配(错误是期望它按顺序接受 4 个整数和 2 个 float 并返回 void)。

4)您在 Java 或 C 中打错了名称，因此它们不匹配。