Android音频录制MediaRecorder之简易的录音软件实现代码

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.DialogInterface;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener {

 private Button start;
 private Button stop;
 private ListView listView;
 // 录音文件播放
 private MediaPlayer myPlayer;
 // 录音
 private MediaRecorder myRecorder;
 // 音频文件保存地址
 private String path;
 private String paths = path;
 private File saveFilePath;
 // 所录音的文件
 String[] listFile = null;

 ShowRecorderAdpter showRecord;
 AlertDialog aler = null;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  start = (Button) findViewById(R.id.start);
  stop = (Button) findViewById(R.id.stop);
  listView = (ListView) findViewById(R.id.list);
  myPlayer = new MediaPlayer();
  myRecorder = new MediaRecorder();
  // 从麦克风源进行录音
  myRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
  // 设置输出格式
  myRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
  // 设置编码格式
  myRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
  showRecord = new ShowRecorderAdpter();
  if (Environment.getExternalStorageState().equals(
    Environment.MEDIA_MOUNTED)) {
   try {
    path = Environment.getExternalStorageDirectory()
      .getCanonicalPath().toString()
      + "/XIONGRECORDERS";
    File files = new File(path);
    if (!files.exists()) {
     files.mkdir();
    }
    listFile = files.list();
   } catch (IOException e) {
    e.printStackTrace();
   }
  }

  start.setOnClickListener(this);
  stop.setOnClickListener(this);
  if (listFile != null) {
   listView.setAdapter(showRecord);
  }

 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }

 class ShowRecorderAdpter extends BaseAdapter {

  @Override
  public int getCount() {
   return listFile.length;
  }

  @Override
  public Object getItem(int arg0) {
   return arg0;
  }

  @Override
  public long getItemId(int arg0) {
   return arg0;

  }

  @Override
  public View getView(final int postion, View arg1, ViewGroup arg2) {
   View views = LayoutInflater.from(MainActivity.this).inflate(
     R.layout.list_show_filerecorder, null);
   TextView filename = (TextView) views
     .findViewById(R.id.show_file_name);
   Button plays = (Button) views.findViewById(R.id.bt_list_play);
   Button stop = (Button) views.findViewById(R.id.bt_list_stop);

   filename.setText(listFile[postion]);
   // 播放录音
   plays.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View arg0) {
     try {
      myPlayer.reset();
      myPlayer.setDataSource(path + "/" + listFile[postion]);
      if (!myPlayer.isPlaying()) {

       myPlayer.prepare();
       myPlayer.start();
      } else {
       myPlayer.pause();
      }

     } catch (IOException e) {
      e.printStackTrace();
     }
    }
   });
   // 停止播放
   stop.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View arg0) {
     if (myPlayer.isPlaying()) {
      myPlayer.stop();
     }
    }
   });
   return views;
  }

 }

 @Override
 public void onClick(View v) {
  switch (v.getId()) {
  case R.id.start:
   final EditText filename = new EditText(this);
   Builder alerBuidler = new Builder(this);
   alerBuidler
     .setTitle("请输入要保存的文件名")
     .setView(filename)
     .setPositiveButton("确定",
       new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog,
          int which) {
         String text = filename.getText().toString();
         try {
          paths = path
            + "/"
            + text
            + new SimpleDateFormat(
              "yyyyMMddHHmmss").format(System
              .currentTimeMillis())
            + ".amr";
          saveFilePath = new File(paths);
          myRecorder.setOutputFile(saveFilePath
            .getAbsolutePath());
          saveFilePath.createNewFile();
          myRecorder.prepare();
          // 开始录音
          myRecorder.start();
          start.setText("正在录音中。。");
          start.setEnabled(false);
          aler.dismiss();
          // 重新读取 文件
          File files = new File(path);
          listFile = files.list();
          // 刷新ListView
          showRecord.notifyDataSetChanged();
         } catch (Exception e) {
          e.printStackTrace();
         }

        }
       });
   aler = alerBuidler.create();
   aler.setCanceledOnTouchOutside(false);
   aler.show();
   break;
  case R.id.stop:
   if (saveFilePath.exists() && saveFilePath != null) {
    myRecorder.stop();
    myRecorder.release();
    // 判断是否保存 如果不保存则删除
    new AlertDialog.Builder(this)
      .setTitle("是否保存该录音")
      .setPositiveButton("确定", null)
      .setNegativeButton("取消",
        new DialogInterface.OnClickListener() {
         @Override
         public void onClick(DialogInterface dialog,
           int which) {
          saveFilePath.delete();
          // 重新读取 文件
          File files = new File(path);
          listFile = files.list();
          // 刷新ListView
          showRecord.notifyDataSetChanged();
         }
        }).show();

   }
   start.setText("录音");
   start.setEnabled(true);
  default:
   break;
  }

 }

 @Override
 protected void onDestroy() {
  // 释放资源
  if (myPlayer.isPlaying()) {
   myPlayer.stop();
   myPlayer.release();
  }
  myPlayer.release();
  myRecorder.release();
  super.onDestroy();
 }

}