LameMP3

采用lame开源库，通过JNI 调用本地方法实现MP3格式的录制 https://sourceforge.net/projects/lame/files/lame/

最新版本

模块	lamemp3
最新版本

开源lame 版本 3.100
引入
```
compile 'com.zhang.lamemp31.0.0'
```

使用方法

/**
 * 采样率：音频的采样频率，每秒钟能够采样的次数，
 *采样率越高，音质越高。给出的实例是44100、22050、11025但不限于这几个参数。
 */
recorder = new Mp3Player(this, 8000);
recorder.setFilePath(dir + "/" + fileName);//录音保存目录
//停止播放监听
btn_play_stop.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        recorder.stopPlay();
    }
});
//播放本地音乐
btn_play.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        recorder.play(dir + "/" + fileName);
    }
});
//播放回调 可以按需要封装
recorder.setOnPlayListener(new Mp3Player.AudioPlayerListener() {
    @Override
    public void AudioUpdate(int level, int time) {
        tv.setText(String.valueOf("播放  \n level = " + level + "\n time = " + time + "s"));
    }
});
//播放完成监听
recorder.setOnPlayFinishListener(new Mp3Player.AudioPlayerFinishListener() {
    @Override
    public void finish() {
        Toast.makeText(MainActivity.this, "播放结束", Toast.LENGTH_SHORT).show();
    }
});
//开始录制语音
btn_record.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        recorder.start();
    }
});
//停止录制
btn_stop.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        recorder.stop();
    }
});
//暂停录制
btn_pause.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        recorder.pause();
    }
});
//继续录制
btn_continue.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        recorder.restore();
    }
});
//录制时间回调
recorder.setAudioUpdateListener(new Mp3Player.AudioUpdateListener() {
    @Override
    public void AudioUpdate(int level, int time) {
        tv.setText(String.valueOf("录制  \nlevel = " + level + "\n time = " + time + "s"));
    }
});
//录制结束监听
recorder.setAudioFinishListener(new Mp3Player.AudioFinishListener() {
    @Override
    public void finish() {
        Toast.makeText(MainActivity.this, "录制结束", Toast.LENGTH_SHORT).show();
    }
});
//录制错误监听
recorder.setOnErrorListener(new Mp3Player.OnErrorListener() {
    @Override
    public void onErrorInfo(String message) {
        Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show();
    }
});

最后记得释放子线程

 @Override
protected void onDestroy() {
```
 super.onDestroy();
 recorder.onDestory();
```
}

cmakeList.txt

 #1.cmake verson，指定cmake版本
 cmake_minimum_required(VERSION 3.4.1)
 # Creates and names a library, sets it as either STATIC
 # or SHARED, and provides the relative paths to its source code.
 # You can define multiple libraries, and CMake builds them for you.
 # Gradle automatically packages shared libraries with your APK.

        #2.project name，指定项目的名称，一般和项目的文件夹名称对应
        PROJECT(LaneMp3)
        #3.head file path，头文件目录
        INCLUDE_DIRECTORIES(
        src/main/cpp/include
        )
        #4.source directory，源文件目录
        AUX_SOURCE_DIRECTORY(src/main/cpp DIR_SRCS)
        #5.set environment variable，设置环境变量，编译用到的源文件全部都要放到这里，否则编译能够通过，但是执行的时候会出现各种问题，比如"symbol lookup error xxxxx , undefined symbol"
        SET(TEST_MATH
        ${DIR_SRCS}
        )
        add_library( # Sets the name of the library.
                     native_lame_mp3
                     # Sets the library as a shared library.
                     SHARED
                     # Provides a relative path to your source file(s).
                     ${DIR_SRCS} )
        #6.add executable file，添加要编译的可执行文件
        ADD_EXECUTABLE(${PROJECT_NAME} ${TEST_MATH})
        #7.add link library，添加可执行文件所需要的库，比如我们用到了libm.so（命名规则：lib+name+.so），就添加该库的名称
        target_link_libraries(${PROJECT_NAME} native_lame_mp3)

混淆配置

 -keep class com.zhang.lamemp3.jni.lameMp3

常见问题

FAILURE: Build failed with an exception.
 * What went wrong:
 Execution failed for task 'externalNativeBuildRelease'.
 > Build command failed.
   Error while executing process D:\android\cmake\3.6.3155560\bin\cmake.exe with arguments {--build F:\git\LameMp3Demo\lib_lame\.externalNativeBuild\cmake\release\x86 --target LaneMp3}
   [1/1] Linking C executable LaneMp3
   FAILED: cmd.exe /C "cd . && D:\android\ndk-bundle\toolchains\llvm\prebuilt\windows-x86_64\bin\clang.exe  --target=i686-none-linux-android --gcc-toolchain=D:/android/ndk-bundle/toolchains/x86-4.9/prebuilt/windows-x86_64 --sysroot=D:/android/ndk-bundle/sysroot -isystem D:/android/ndk-bundle/sysroot/usr
 /include/i686-linux-android -D__ANDROID_API__=17 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -mstackrealign -Wa,--noexecstack -Wformat -Werror=format-security -DSTDC_HEADERS -O2 -DNDEBUG  -Wl,--exclude-libs,libgcc.a --sysroot D:/android/ndk-bundle/pl
 atforms/android-17/arch-x86 -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -Wl,--gc-sections -Wl,-z,nocopyreloc -pie -fPIE CMakeFiles/LaneMp3.dir/src/main/cpp/bitstream.c.o CMakeFiles/LaneMp3.dir/src/main/cp
 p/encoder.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/fft.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/gain_analysis.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/id3tag.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/lame.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/mpglib_interface.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/native
 -lib.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/newmdct.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/presets.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/psymodel.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/quantize.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/quantize_pvt.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/reservoir.c
 .o CMakeFiles/LaneMp3.dir/src/main/cpp/set_get.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/tables.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/takehiro.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/util.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/vbrquantize.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/VbrTag.c.o CMakeFiles/L
 aneMp3.dir/src/main/cpp/version.c.o CMakeFiles/LaneMp3.dir/src/main/cpp/xmm_quantize_sub.c.o  -o LaneMp3  ../../../../build/intermediates/cmake/release/obj/x86/libnative_lame_mp3.so -lm && cd ."
   D:/android/ndk-bundle/platforms/android-17/arch-x86/usr/lib\crtbegin_dynamic.o:crtbegin.c:function _start: error: undefined reference to 'main'
   clang.exe: error: linker command failed with exit code 1 (use -v to see invocation)
   ninja: build stopped: subcommand failed.

解决方法
```
  更新你的NDK 和Cmake工具
```

LameMP3

采用lame开源库，通过JNI 调用本地方法 实现MP3格式的录制 https://sourceforge.net/projects/lame/files/lame/

最新版本

采用lame开源库，通过JNI 调用本地方法实现MP3格式的录制 https://sourceforge.net/projects/lame/files/lame/