If you want to individually enable LOGV in your code, just add the
following #define in your cpp class ::
#define LOG_NDEBUG 0
This will enable all log levels in your code (Not the entire Android
src) : LOGE, LOGI, LOGD, LOGV, LOGW
这个是为什么呢?阅读源码
/framework/system/core/include/cutils/log.h
可以看到注释
/*
* Normally we strip LOGV (VERBOSE messages) from release builds.
* You can modify this (for example with "#define LOG_NDEBUG 0"
* at the top of your source file) to change that behavior.
*/
#ifndef LOG_NDEBUG
#ifdef NDEBUG
#define LOG_NDEBUG 1
#else
#define LOG_NDEBUG 0
#endif
#endif
在DebugFlags.java上可以打开java层的代码