我已经设法从源代码编译 android 并安装在我的手机上。我可能应该从一开始就说我不是 C++ 开发人员，但我希望我能够弄清楚如何将变量中保存的数据输出到文件中。
经过一番谷歌搜索后，我想出了以下代码：
#include <iostream>
#include <fstream>
using namespace std;
ofstream myfile;
myfile.open ("/data/wav.raw");
myfile < mMixBuffer;
myfile.close();
frameworks/base/services/audioflinger/AudioFlinger.cpp: In member function 'virtual bool android::AudioFlinger::MixerThread::threadLoop()':
frameworks/base/services/audioflinger/AudioFlinger.cpp:1769: error: 'ofstream' was not declared in this scope
frameworks/base/services/audioflinger/AudioFlinger.cpp:1769: error: expected ';' before 'myfile'
frameworks/base/services/audioflinger/AudioFlinger.cpp:1770: error: 'myfile' was not declared in this scope
在这不起作用之后，我尝试了再次给出编译错误：
int fd;
fd = ::open("/data/wav.raw",O_WRONLY | O_APPEND);
::write(fd,mMixBuffer,minBufferSize);
::close(fd);
frameworks/base/services/audioflinger/AudioFlinger.cpp: In member function 'virtual bool android::AudioFlinger::MixerThread::threadLoop()':
frameworks/base/services/audioflinger/AudioFlinger.cpp:1770: error: '::open' has not been declared
frameworks/base/services/audioflinger/AudioFlinger.cpp:1770: error: 'O_WRONLY' was not declared in this scope
frameworks/base/services/audioflinger/AudioFlinger.cpp:1770: error: 'O_APPEND' was not declared in this scope
如果从上面不清楚，我正在尝试将变量的内容附加mMixBuffer到minBufferSize文件/data/wav.raw中。有谁知道我怎么能做到这一点？