Use latest Lame-3.100 to transform PCM, WAV, AIFF and other uncompressed formats into MP3 format files.

//Project build.gradle
allprojects {
		repositories {
			...
			maven { url 'https://jitpack.io' }
		}
	}
//Module build.gradle
dependencies {
	        implementation 'com.github.Jay-Goo:Mp3Converter:v0.0.3'
	}

 /**
     * init lame
     * @param inSampleRate
     *              input sample rate in Hz
     * @param channel
     *              number of channels
     * @param mode
     *              0 = CBR, 1 = VBR, 2 = ABR.  default = 0
     * @param outSampleRate
     *              output sample rate in Hz
     * @param outBitRate
     *              rate compression ratio in KHz
     * @param quality
     *              quality=0..9. 0=best (very slow). 9=worst.<br />
     *              recommended:<br />
     *              2 near-best quality, not too slow<br />
     *              5 good quality, fast<br />
     *              7 ok quality, really fast
     */
 Mp3Converter.init(44100, 1, 0, 44100, 96, 7);

 /**
     * file convert to mp3
     * it may cost a lot of time and better put it in a thread
     * @param input
     *          file path to be converted
     * @param mp3
     *          mp3 output file path
     */
    Mp3Converter.convertMp3(inputPath, mp3Path);


  /**
     * get converted bytes in inputBuffer
     * @return
     *          converted bytes in inputBuffer
     *          to ignore the deviation of the file size,when return to -1 represents convert complete
     */
	Mp3Converter.getConvertBytes()

You can use Android Studio Make Module 'library'to create your *.so files, they will be created in your library/src/jniLibsFolder.

This library support armeabi-v7a, arm64-v8a, mips, mips64, x86, x86_64

You can learn how to build this library through this article.

Support amr format

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MIT License Copyright (c) 2018 Jay-Goo