NDK33_最全排查UnsatisfiedLinkError: No implementation found

NDK开发汇总
报错：No implementation found for java.lang.String

问题排查

1. build.gradle配置 abiFilters ‘armeabi-v7a’

android {
			...
			defaultConfig {
       		 ...
	       		 externalNativeBuild {
       	    		 cmake {
              			  cppFlags ""
              			  abiFilters 'armeabi-v7a'
         	   		}
        	}
    	}
    }

2. CmakeList配置实现方法的cpp路径:add_library

cmake_minimum_required(VERSION 3.4.1)

# 引入指定目录下的CMakeLists.txt
add_subdirectory(src/main/cpp/librtmp)

add_library(
             native-lib

             SHARED

             src/main/cpp/native-lib.cpp
             src/main/cpp/VideoChannel.cpp)
...

3. 检查包名路径与c/cpp中静态注册的是否一致
   java路径：com.cn.ray.rtmpdump.LivePusher
   cpp实现方法

#include <jni.h>
#include <string>
#include "safe_queue.h"

extern "C" JNIEXPORT void JNICALL
Java_com_cn_ray_rtmpdump_LivePusher_native_1init(JNIEnv *env, jobject instance) {



}

注意：

• 引入#include <jni.h>
• 方法中有_后面带1
• cpp中实现带extern “C”，extern "C"只针对当前这一个方法

3. loadLibrary 要在方法调用前（static）加载，注意是 System.loadLibrary

 static {
        System.loadLibrary("native-lib");
    }

4. 清除缓存
   Clean Project-> Rebuild Project -> Refresh Linked C++ Projects