实现类似微信中说话功能的录音处理代码实例

实现类似微信中说话功能的录音处理代码实例
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package com.example.testaudio; import java.io.File; import android.app.Activity;import android.media.MediaPlayer;import android.media.MediaPlayer.OnCompletionListener;import android.media.MediaRecorder;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.Menu;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnTouchListener;import android.widget.Button;import android.widget.TextView; public class MainActivity extends Activity { private MediaRecorder recoder = null; private MediaPlayer player = null; private String theMediaPath; TextView tv = null; TextView tvRecord = null; Button testBtn = null; Button testBtn2 = null; Button stopBtn = null; Button playBtn = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tv = (TextView)findViewById(R.id.textView1); tvRecord = (TextView)findViewById(R.id.tvRecord); testBtn = (Button)findViewById(R.id.button1); testBtn2 = (Button)findViewById(R.id.button2); stopBtn = (Button)findViewById(R.id.buttonStop); playBtn = (Button)findViewById(R.id.buttonPlay); testBtn2.setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { Log.i("testactivity", "setOnTouchListener:"+event.getAction()); switch(event.getAction()) { case MotionEvent.ACTION_UP: { Log.i("testactivity", "停止录音"); stopRecording(); break; } case MotionEvent.ACTION_DOWN: { Log.i("testactivity", "开始录音"); startRecording(); break; } default: break; } return false; } }); testBtn.setOnClickListener(new OnClickListener() { public void onClick(View arg0) { startRecording(); testBtn.setEnabled(false); stopBtn.setEnabled(true); } }); stopBtn.setEnabled(false); stopBtn.setOnClickListener(new OnClickListener() { public void onClick(View arg0) { stopRecording(); testBtn.setEnabled(true); playBtn.setEnabled(true); stopBtn.setEnabled(false); } }); playBtn.setOnClickListener(new OnClickListener() { public void onClick(View arg0) { playRecordFile(theMediaPath); stopBtn.setEnabled(true); } }); } protected void playRecordFile(String _file) { try { File f = new File(_file); if(!f.exists()) { tv.setText("文件不存在:" + _file); return; } } catch(Exception e) { Log.i("testactivity", e.getMessage()); } try { player = new MediaPlayer(); player.setDataSource(_file); player.prepare(); player.setOnCompletionListener(new OnCompletionListener() { public void onCompletion(MediaPlayer arg0) { tv.setText("播放完毕"); stopBtn.setEnabled(false); } }); player.start(); } catch(Exception e) { Log.e("testactivity", "play failed:" + e.getMessage()); } } /** * 停止录音处理 */ protected void stopRecording() { if(recoder != null) { Log.i("testactivity", "停止录音"); recoder.stop(); recoder.release(); recoder = null; endtime = System.currentTimeMillis(); _handleRecordComplete(); } if(player != null) { Log.i("testactivity", "停止播放"); player.stop(); player.release(); player = null; } } /** * 开始录音处理 */ protected void startRecording() { theMediaPath = Environment.getExternalStorageDirectory().getAbsolutePath(); theMediaPath += "/audiotest.3gp"; recoder = new MediaRecorder(); recoder.setAudioSource(MediaRecorder.AudioSource.MIC); recoder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); recoder.setOutputFile(theMediaPath); recoder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); starttime = System.currentTimeMillis(); updateMicStatus(); try { recoder.prepare(); recoder.start(); _handleRecordStart(); } catch (Exception e) { Log.e("testactivity", "prepared failed:" + e.getMessage()); _handleRecordStartError(e); } } //定时器 private static long maxtime = 30*1000; //30秒 private long starttime = 0l; private long endtime = 0l; private final Handler mHandler = new Handler(); private Runnable mUpdateMicStatusTimer = new Runnable() { public void run() { //判断是否超时 if(starttime > 0 && System.currentTimeMillis() - starttime > maxtime) { Log.e("testactivity", "超时的录音时间，直接停止"); stopRecording(); return; } //更新分贝状态 updateMicStatus(); } }; /** * 更新话筒状态 分贝是也就是相对响度 分贝的计算公式K=20lg(Vo/Vi) Vo当前振幅值 Vi基准值为600：我是怎么制定基准值的呢？ 当20 * * Math.log10(mMediaRecorder.getMaxAmplitude() / Vi)==0的时候vi就是我所需要的基准值 * 当我不对着麦克风说任何话的时候，测试获得的mMediaRecorder.getMaxAmplitude()值即为基准值。 * Log.i("mic_", "麦克风的基准值：" + mMediaRecorder.getMaxAmplitude());前提时不对麦克风说任何话 */ private int BASE = 600; private int SPACE = 300;// 间隔取样时间 private void updateMicStatus() { if (recoder != null) { // int vuSize = 10 * mMediaRecorder.getMaxAmplitude() / 32768; int ratio = recoder.getMaxAmplitude() / BASE; int db = 0;// 分贝 if (ratio > 1) db = (int) (20 * Math.log10(ratio)); _handleRecordVoice(db); mHandler.postDelayed(mUpdateMicStatusTimer, SPACE); /* * if (db > 1) { vuSize = (int) (20 * Math.log10(db)); Log.i("mic_", * "麦克风的音量的大小：" + vuSize); } else Log.i("mic_", "麦克风的音量的大小：" + 0); */ } } private void _handleRecordStart() { //开始录音的接收函数 tv.setText("开始录音..."); //starttime 开始时间 } private void _handleRecordStartError(Exception e) { //开始录音的接收函数失败 tv.setText("开始录音失败:" + e.getMessage()); } private void _handleRecordComplete() { //结束录音 tv.setText("停止录音:" + theMediaPath); } private void _handleRecordVoice(int _db) { //声音事件侦听，转换成分贝 tvRecord.setText(""+_db); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } }