AndroidStudio2.3 NDk Cmake配置

其他 2018-08-20 10:24:14 阅读次数: 0

最近使用移植一个项目，里面用到了NDK开发，然后把过程记录一下，
1、创建NativeUtils.java，里面写了一些本地方法
这里写图片描述
2、锤子一下，找到app目录下的classes文件夹，逐级打开，找到包名下的NativeUtils.class
这里写图片描述
3、打开下方的Teminal命令行工具，执行

    cd app\build\intermediates\classes\debug

然后：

    javah -jni com.vincent.sourvide.NativeUtils

如无错误，头文件已生成
这里写图片描述
4、在main下新建jni文件，当然也可以选中app右键新建jni文件夹,然后把头文件复制到jni目录，并创建一个.c源文件（NativeUtils.c)，把头文件中的方法复制到NativeUtils.c文件中，并实现里面的方法

NativeUtils.c内容：

#include <jni.h>
#include "TypeDef.h"
#include "com_vincent_sourvide_NativeUtils.h"

extern unsigned int g_printf_debug_on;
static  JavaVM *g_jvm = NULL; 
static  jobject g_obj = NULL; 
uint32 SendMsgToUi(int msgType, int DevId, uint8* buff, int len);

extern int UserInit(jint sn, jint group_id, int i);
extern int UserNetWorkExit(void);
extern int UserNetWorkPause(void);
extern int UserNetWorkResume(void);
extern int UserEntryScanMode(void);
extern int UserNetWorkResume(void);
extern int UserAddDevie(uint32 sn);
extern int UserDelDevie(uint32 sn);
extern int UserActiveDevice(uint32 sn);
extern int UserDisActiveDevice(uint32 sn);
extern int UserSendData(uint32 SN, uint16 datalen, uint8 *data);
extern int UserDisActiveAll(void);
extern int UserGetServiceLinkStatus(void);
extern int UserApConfig(uint8 *ssid, uint32 ssid_len, uint8 *password, uint32 ps_len, uint32 add_wifi_flg);
extern int UserCancelAPConfig(void);

JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniNetWorkInit
  (JNIEnv *env, jobject jo,  jint sn, jint group_id)
{

    JNI_LOGI("JNI_INTERFACE: JniNetWorkInit!!!!!!!!");
    //???????JVM???????????????
    (*env)->GetJavaVM(env,&g_jvm);

    //?????????(g_obj = obj)
    g_obj = (*env)->NewGlobalRef(env,jo);

    return UserInit(sn, group_id, 0);
}


JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniNetWorkApInit
  (JNIEnv *env, jobject jo,   jint sn, jint group_id)
{

    JNI_LOGI("JNI_INTERFACE: JniNetWorkApInit!!!!!!!!");
    //???????JVM??????????????? 
    (*env)->GetJavaVM(env,&g_jvm); 

    //?????????(g_obj = obj) 
    g_obj = (*env)->NewGlobalRef(env,jo); 

    g_printf_debug_on = 1;

    return UserInit(0, group_id, 1);
}


JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniNetWorkExit
  (JNIEnv *env, jobject jo)
{
    if(g_printf_debug_on != 0)
    {
        JNI_LOGI("JNI_INTERFACE: JniNetWorkExit!!!!!!!!");
    }

    (*env)->DeleteGlobalRef(env, g_obj);
    return UserNetWorkExit();
}


JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniNetWorkPause
  (JNIEnv *env, jobject jo)
{
    int rc = 0;

    if(g_printf_debug_on != 0)
    {
        JNI_LOGI("JNI_INTERFACE: JniNetWorkPause!!!!!!!!");
    }

    rc = UserNetWorkPause();
    return rc;
}

JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniNetWorkResume
  (JNIEnv *env, jobject jo)
{
    int rc = 0;

    if(g_printf_debug_on != 0)
    {
        JNI_LOGI("JNI_INTERFACE: JniNetWorkResume!!!!!!!!");
    }

    rc = UserNetWorkResume();
    return rc;
}

JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniEntryScanMode
  (JNIEnv *env, jobject jo)
{
    int rc = 0;

    if(g_printf_debug_on != 0)
    {
       JNI_LOGI("JNI_INTERFACE: JniEntryScanMode!!!!!!!!");
    }

   //rc = UserEntryScanMode();

    return rc;
}

JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniExitScanMode
  (JNIEnv *env, jobject jo)
{
    int rc = 0;

    if(g_printf_debug_on != 0)
    {
        JNI_LOGI("JNI_INTERFACE: JniExitScanMode!!!!!!!!");
    }

   // rc = UserExitScanMode();

    return rc;
}


JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniAddDevie
  (JNIEnv *env, jobject jo, jint sn)
{
    int rc = 0;

    if(g_printf_debug_on != 0)
    {
        JNI_LOGI("JNI_INTERFACE: JniAddDevie SN = %X!!!!!!!!", sn);
    }

   // rc = UserAddDevie(sn);

    return rc;
}

JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniDelDevie
  (JNIEnv *env, jobject jo, jint sn)
{
    int rc = 0;

    if(g_printf_debug_on != 0)
    {
        JNI_LOGI("JNI_INTERFACE: JniDelDevie SN = %X!!!!!!!!", sn);
    }

   // rc = UserDelDevie(sn);

   return rc;
}

JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniActiveDevice
  (JNIEnv *env, jobject jo, jint sn)
{
    int rc = 0;

    if(g_printf_debug_on != 0)
    {
        JNI_LOGI("JNI_INTERFACE: JniActiveDevice SN = %X!!!!!!!!", sn);
    }

   // rc = UserActiveDevice(sn);

    return rc;
}


JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniDisActiveDevice
  (JNIEnv *env, jobject jo, jint sn)
{
    int rc = 0;

    if(g_printf_debug_on != 0)
    {
        JNI_LOGI("JNI_INTERFACE: JniDisActiveDevice SN = %X!!!!!!!!", sn);
    }

  // rc = UserDisActiveDevice(sn);

    return rc;
}



JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniDisActiveAll
  (JNIEnv *env, jobject jo)
{
    int rc = 0;

    if(g_printf_debug_on != 0)
    {
        JNI_LOGI("JNI_INTERFACE: JniDisActiveAll!!!!!!!!");
    }

   // rc = UserDisActiveAll();
    return rc;
}

JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniGetDeviceLinkStatus
  (JNIEnv *env, jobject jo, jint sn)
{
    int rc = 0;

   // rc = UserGetDeviceLinkStatus(sn);

    if(g_printf_debug_on != 0)
    {
        JNI_LOGI("JNI_INTERFACE: JniGetDeviceLinkStatus SN = %X, rc=%d !!", sn, rc);
    }

    return rc;
}


JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniGetServiceLinkStatus
  (JNIEnv *env, jobject jo)
{
    int rc = 0;

    rc = UserGetServiceLinkStatus();

    if(g_printf_debug_on != 0)
    {
           JNI_LOGI("JNI_INTERFACE: JniGetServiceLinkStatus, rc=%u!!!!!!!!", rc);
    }
    return rc;
}

//????????
JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniApConfig
    (JNIEnv *env, jobject jo, jbyteArray ssid, jbyteArray password,  jint add_wifi)
{
    int rc = 0;    
    jbyte *jb_ssid;
    jbyte *jb_password;
    int ssid_len;
    int ps_len;

    jb_ssid = (*env)-> GetByteArrayElements(env,ssid,0);
    jb_password = (*env)-> GetByteArrayElements(env,password,0);

    ssid_len =  (*env)->GetArrayLength(env, ssid);
    ps_len =  (*env)->GetArrayLength(env, password);

    if(g_printf_debug_on != 0)
    {
        JNI_LOGI("JNI_INTERFACE: JniApConfig, ssid_len=%d, ps_len=%d", ssid_len, ps_len);
    }

   // rc = UserApConfig(jb_ssid, ssid_len,  jb_password, ps_len, add_wifi);

    return rc;
}

JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniCancelAPConfig
(JNIEnv *env, jobject jo)
{
    int rc = 0;

    if(g_printf_debug_on != 0)
    {
        JNI_LOGI("JNI_INTERFACE: JniCancelAPConfig!!!!!!!!");
    }

   // UserCancelAPConfig();

    return rc;
}

JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_JniSendData
    (JNIEnv *env, jobject jo, jint sn, jint datalen, jbyteArray data)
{
    int rc = 0;
    jbyte *p;

    p = (*env)-> GetByteArrayElements(env,data,0);  

    rc = UserSendData(sn, datalen, p);

    if(g_printf_debug_on != 0)
    {
          JNI_LOGI("JNI_INTERFACE: send data: sn=%x, len=%d!", sn, datalen);
    }

    return rc;
}


JNIEXPORT jint JNICALL Java_com_vincent_sourvide_NativeUtils_registerUserInfo
    (JNIEnv *env, jobject jo, jstring user_sn, jstring name, jstring phone, jstring province, jstring city, jstring district, jstring other)
{
    int rc = 0;


    return rc;
}



char MainCmdString[16][64] = {
      "MAIN_MSG_TYPE_GET_APP_SN",
      "MAIN_MSG_TYPE_DATA",
      "MAIN_MSG_TYPE_NETWORK_UP",
      "MAIN_MSG_TYPE_NETWORK_DOWN",
      "MAIN_MSG_TYPE_FIND_NEW_WIFI_DEV",
      "MAIN_MSG_TYPE_MISS_NEW_WIFI_DEV",
      "MAIN_MSG_TYPE_ADD_NEW_WIFI_DEV_SUCCESS",
      "MAIN_MSG_TYPE_DEL_WIFI_DEV_SUCCESS",
      "MAIN_MSG_TYPE_SET_WIFI_PASSWORD_SUCCESS",
      "MAIN_MSG_NULL",
      "MAIN_MSG_TYPE_ONE_SECOND",
      "MAIN_MSG_NULL",
      "MAIN_MSG_NULL",
      "MAIN_MSG_NULL",
      "MAIN_MSG_NULL",
      "MAIN_MSG_NULL"};

 uint32 SendMsgToUi(int msgType, int DevId, uint8* buff, int len)
 {
    #if 1
     int i;
     JNIEnv *JniEnv; 
     jclass JNIJavacClass; 
     jfieldID   JvBuffId;
     jmethodID CtoJavaId;

      //Attach????? 
     if((*g_jvm)->AttachCurrentThread(g_jvm, &JniEnv, NULL) != JNI_OK) 
     { 
         LOGI("%s: AttachCurrentThread() failed", __FUNCTION__); 
         return false;
     } 

      //?????????? 
     JNIJavacClass = (*JniEnv)->GetObjectClass(JniEnv,g_obj);
     if(JNIJavacClass == NULL) 
     { 
         LOGI("FindClass() Error....."); 
         goto error; 
     } 

     CtoJavaId = (*JniEnv)->GetStaticMethodID(JniEnv, JNIJavacClass,"SendMsgToUi","(III[B)V");//????java?е?show??????ID??????????????void????  
     JvBuffId  = (*JniEnv)->GetFieldID(JniEnv,  JNIJavacClass, "CtoJvBuff", "[B");

     jbyteArray  array =   (*JniEnv)->GetObjectField(JniEnv, g_obj, JvBuffId);

      jsize length = (*JniEnv)->GetArrayLength(JniEnv, array);

      if(length < len)
      {
          goto error;
      }

      (*JniEnv)->SetByteArrayRegion(JniEnv, array, 0, len, (jbyte*)buff);

    // jbyte *pointer = (*JniEnv)->GetByteArrayElements(JniEnv, array, NULL); //??????????

    //for (i=0; i<len; i++)
    //{
    //    pointer[i] = buff[i]; //?????????????
    //}

    //(*JniEnv)->ReleaseByteArrayElements(JniEnv, array, pointer, 0); //?????棬???????????

    (*JniEnv)->CallStaticVoidMethod(JniEnv, JNIJavacClass,CtoJavaId,msgType,DevId, len, array);

    if(g_printf_debug_on != 0)
    {
            JNI_LOGI("SendMsgToUi: msgType=%s, DevId=%X, len=%d", MainCmdString[msgType], DevId, len);
    }

error:   

      if((*g_jvm)->DetachCurrentThread(g_jvm) != JNI_OK) 
     { 
         LOGI("%s: DetachCurrentThread() failed", __FUNCTION__); 
     } 

     #endif
     return true;
 }

5、我这里还有别的文件就不列举了。在app的build.gradle中的defaultConfig{}中配置，我只生成一个通用的so库

    android {
    .....
    defaultConfig {
       ......
       .....
        ndk {
            // 设置支持的 SO 库构架，注意这里要根据你的实际情况来设置
            abiFilters 'armeabi'// 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64', 'mips', 'mips64'
        }
    }
 }

6、在CMakeLists.txt文件重配置，这个文件是专门配置NDK相关的东西，类似gradle.build中配置Android编译相关的东西一样。。

    # For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html

# Sets the minimum version of CMake required to build the native library.

cmake_minimum_required(VERSION 3.4.1)

add_library(    # 需要生成的so文件名
                NativeUtils
                SHARED
                src/main/cpp/NetSocket.c # 配置源文件路径，
                src/main/cpp/NativeUtils.c)

find_library(
              log-lib
              log )



target_link_libraries( # 注意：这里的名称要和add_library的名称一致，否则会报错，无法生成so库
                        NativeUtils
                       # src/main/cpp/NetSocket.c
                       ${log-lib} )

7、编译一下，生成so…
这里写图片描述

ps:本来之前还有.a静态库的，一直没有配置正确，就没有引用静态库了，后续再研究一下。。。

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