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/
| 模块 | lamemp3 |
|---|---|
| 最新版本 |  |
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开源lame 版本 3.100
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引入
compile 'com.zhang.lamemp3:lib_lame:1.0.0' -
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 ':lib_lame: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