AudioManager 录音 然后保存在本地及播放

调用系统的AudioManager 录音 然后保存在本地，点击播放录音
一个类搞定所有

需要权限：

package com.example.savesound;

import java.io.IOException;

import android.app.Activity;
import android.content.Context;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;

public class MainActivity extends Activity {
private static final String LOG_TAG = “MainActivity”;
private static String mFileName = null;

private RecordButton mRecordButton = null;
private MediaRecorder mRecorder = null;

private PlayButton mPlayButton = null;
private MediaPlayer mPlayer = null;

private void onRecord(boolean start) {
  if (start) {
    startRecording();
  } else {
    stopRecording();
  }
}

private void onPlay(boolean start) {
  if (start) {
    startPlaying();
  } else {
    stopPlaying();
  }
}


private static final int a = 0;

private void startPlaying() {
  mPlayer = new MediaPlayer();
  try {
    mPlayer.setDataSource(mFileName);
    mPlayer.prepare();
    AudioManager audioManager = (AudioManager) this.getSystemService(this.AUDIO_SERVICE);
    audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, 10, 0);
    mPlayer.start();
  } catch (IOException e) {
    Log.e(LOG_TAG, "prepare() failed");
  }
}

private void stopPlaying() {
  mPlayer.release();
  mPlayer = null;
}

private void startRecording() {
  mRecorder = new MediaRecorder();
  mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
  mRecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
  mRecorder.setOutputFile(mFileName);
  mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

  try {
    mRecorder.prepare();
  } catch (IOException e) {
    Log.e(LOG_TAG, "prepare() failed");
  }

  mRecorder.start();
}

private void stopRecording() {
  mRecorder.stop();
  mRecorder.release();
  mRecorder = null;
}

class RecordButton extends Button {
  boolean mStartRecording = true;

  OnClickListener clicker = new OnClickListener() {
    public void onClick(View v) {
      onRecord(mStartRecording);
      if (mStartRecording) {
        setText("停止记录");
      } else {
        setText("开始记录");
      }
      mStartRecording = !mStartRecording;
    }
  };

  public RecordButton(Context ctx) {
    super(ctx);
    setText("开始记录");
    setOnClickListener(clicker);
  }
}

class PlayButton extends Button {
  boolean mStartPlaying = true;

  OnClickListener clicker = new OnClickListener() {
    public void onClick(View v) {
      onPlay(mStartPlaying);
      if (mStartPlaying) {
        setText("停止播放");
      } else {
        setText("开始播放");
      }
      mStartPlaying = !mStartPlaying;
    }
  };

  public PlayButton(Context ctx) {
    super(ctx);
    setText("开始播放");
    setOnClickListener(clicker);
  }
}

public MainActivity() {
  mFileName = Environment.getExternalStorageDirectory().getAbsolutePath();
  mFileName += "/audiorecordtest.amr";
}

@Override
public void onCreate(Bundle icicle) {
  super.onCreate(icicle);

  LinearLayout ll = new LinearLayout(this);
  mRecordButton = new RecordButton(this);
  ll.addView(mRecordButton, new LinearLayout.LayoutParams(
      ViewGroup.LayoutParams.WRAP_CONTENT,
      ViewGroup.LayoutParams.WRAP_CONTENT, 0));
  mPlayButton = new PlayButton(this);
  ll.addView(mPlayButton, new LinearLayout.LayoutParams(
      ViewGroup.LayoutParams.WRAP_CONTENT,
      ViewGroup.LayoutParams.WRAP_CONTENT, 0));
  setContentView(ll);
}

@Override
public void onPause() {
  super.onPause();
  if (mRecorder != null) {
    mRecorder.release();
    mRecorder = null;
  }

  if (mPlayer != null) {
    mPlayer.release();
    mPlayer = null;
  }
}

}