Android studio配置jni打印

• cmakelists.txt 

add_library( # Specifies the name of the library.
            trans//你的库名称

        # Sets the library as a shared library.
            SHARED//可共享

        # Provides a relative path to your source file(s).
            src/main/jni/trans.c )//源码路径
//以下为打印
find_library( # Sets the name of the path variable.
        log-lib

        # Specifies the name of the NDK library that
        # you want CMake to locate.
        log )

target_link_libraries( # Specifies the target library.
        trans//你的库名称

        # Links the target library to the log library
        # included in the NDK.
        ${log-lib} )
//打印引入结束

 

• c代码

  #include <jni.h>
  #include <string.h>
  //引入打印库
  #include <android/log.h>
  //打印标签
  #define TAG "trans-jni"
  //定义打印
  #define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG,TAG ,__VA_ARGS__)
  调用
  LOGD("这是一条打印");
  其规则和c相同，支持使用占位符
  int mathNum= 10;
  LOGD("长度== %d",mathNum);