1、请求录制音频权限
<user-permission android:name="android.permission.RECORD_AUDIO"/>
RECORD_AUDIO 权限从6.0后需要进行用户授权，通过ActivityCompat.requestPermissions();
2、创建运行MediaRecorder
2.1 设置音频源setAudioSource(int audio_source) ，多少情况使用MediaRecorder.AudioSource.MIC
2.2 设置输出音频文件格式 setOutputFormat(int output_format)
*(Android 8.0 开始支持MPEG2_TS 格式)
2.4 设置音频编码器 setAudioEncoder(int audio_encoder)
2.5 通过完成初始化 prepare()
3 停止释放资源
MediaPlayer mediaPlayer=new MediaPlayer(); mediaPlayer.setDataSource(recordFile.getPath()); mediaPlayer.prepare(); mediaPlayer.start(); mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { mp.reset(); } }); package com.rexkell.mediaapplication; import android.media.MediaPlayer; import android.media.MediaRecorder; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import java.io.File; import java.io.IOException; /** * author: rexkell * explain:MediaRecord 录制音频 */ public class MediaRecordActivity extends AppCompatActivity { private boolean isRecording=false; MediaRecorder mediaRecorder; MediaPlayer mediaPlayer; File recordFile; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.ac_mediarecord); init(); } public void init(){ mediaRecorder=new MediaRecorder(); //设置音频的来源 mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); //设置音频的输出格式 mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_WB); //设置音频文件的编码 mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_WB); mediaPlayer=new MediaPlayer(); recordFile=new File(getExternalFilesDir(null).getPath()+"/test.amr"); } public void record(View v){ isRecording=!isRecording; String text=isRecording?"暂停":"录制"; ((Button)v).setText(text); if (isRecording){ startRecord(); }else { stopRecord(); } } public void play(View v){ if (mediaPlayer.isPlaying()){ return; } //设置数据源 try { mediaPlayer.setDataSource(recordFile.getPath()); mediaPlayer.prepare(); mediaPlayer.start(); mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { mp.reset(); } }); } catch (IOException e) { e.printStackTrace(); } } public void startRecord(){ if (recordFile.exists()){ recordFile.delete(); } try { recordFile.createNewFile(); } catch (IOException e) { e.printStackTrace(); } mediaRecorder.setOutputFile(recordFile.getPath()); try { mediaRecorder.prepare(); mediaRecorder.start(); } catch (IOException e) { e.printStackTrace(); } } public void stopRecord(){ if (mediaRecorder!=null&&isRecording){ mediaRecorder.stop(); mediaRecorder.release(); mediaRecorder=null; } } public void stopPlay(){ if(mediaPlayer!=null){ mediaPlayer.stop(); mediaPlayer.release(); mediaPlayer=null; } } }