Android Media Recorder录音播放源代码

package irdc.ex07_11;



import java.io.File;

import java.io.IOException;

import java.util.ArrayList;



import android.app.Activity;

import android.content.Intent;

import android.media.MediaRecorder;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.CheckedTextView;

import android.widget.ImageButton;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;



public class EX07_11 extends Activity

{

  private ImageButton myButton1;

  private ImageButton myButton2;

  private ImageButton myButton3;

  private ImageButton myButton4;



  private ListView myListView1;

  private String strTempFile = "ex07_11_";

  private File myRecAudioFile;

  private File myRecAudioDir;// 得到Sd卡path

  private File myPlayFile;

  private MediaRecorder mMediaRecorder01;



  private ArrayList<String> recordFiles;

  private ArrayAdapter<String> adapter;// 用于ListView的适配器

  private TextView myTextView1;

  private boolean sdCardExit;

  private boolean isStopRecord;



  /** Called when the activity is first created. */

  @Override

  public void onCreate(Bundle savedInstanceState)

  {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);

    //主要是4个控制按钮(录制,停止,播放,删除)

    myButton1 = (ImageButton) findViewById(R.id.ImageButton01);

    myButton2 = (ImageButton) findViewById(R.id.ImageButton02);

    myButton3 = (ImageButton) findViewById(R.id.ImageButton03);

    myButton4 = (ImageButton) findViewById(R.id.ImageButton04);

    //列表出指定文件夹中所有amr格式音频文件

    myListView1 = (ListView) findViewById(R.id.ListView01);

    myTextView1 = (TextView) findViewById(R.id.TextView01);



    myButton2.setEnabled(false);

    myButton3.setEnabled(false);

    myButton4.setEnabled(false);

    /* 判断SD Card是否插入 */

    sdCardExit = Environment.getExternalStorageState().equals(

        android.os.Environment.MEDIA_MOUNTED);



    /* 取得SD Card路径作为录音的文件位置 */

    if (sdCardExit)

    {

      myRecAudioDir = Environment.getExternalStorageDirectory();

    }



    /* 取得SD Card目录里的所有.amr文件 */

    getRecordFiles();



    adapter = new ArrayAdapter<String>(this,

        R.layout.my_simple_list_item, recordFiles);



    /* 将ArrayAdapter添加ListView对象中 */

    myListView1.setAdapter(adapter);



    /* 录音 */

    myButton1.setOnClickListener(new ImageButton.OnClickListener()

    {

      @Override

      public void onClick(View arg0)

      {

        try

        {

          if (!sdCardExit)

          {

            Toast.makeText(EX07_11.this, "请插入SD Card",

                Toast.LENGTH_LONG).show();

            return;

          }

          // 创建录音频文件

          //这种创建方式生成的文件名是随机的,所以我本人不是很习惯

//          myRecAudioFile = File.createTempFile(strTempFile, ".amr",

//              myRecAudioDir);

           File sdcardDir = Environment.getExternalStorageDirectory();

           String path = sdcardDir.getParent() + sdcardDir.getName();

           String filePath = path + java.io.File.separator + "Demo";

          //创建文件，使用自己指定文件名(这里我手动创建好了,我们也可以利用mkdirs的方法来创建)

           myRecAudioFile = new File(filePath,"new.amr");



          mMediaRecorder01 = new MediaRecorder();



          /* 设置录音来源为麦克风 */

          mMediaRecorder01

              .setAudioSource(MediaRecorder.AudioSource.MIC);



          mMediaRecorder01

              .setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);



          mMediaRecorder01

              .setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);

          //文件保存位置

          mMediaRecorder01.setOutputFile(myRecAudioFile

              .getAbsolutePath());



          mMediaRecorder01.prepare();

          mMediaRecorder01.start();



          myTextView1.setText("录音中");



          myButton2.setEnabled(true);

          myButton3.setEnabled(false);

          myButton4.setEnabled(false);



          isStopRecord = false;

        } catch (IOException e)

        {

          // TODO Auto-generated catch block

          e.printStackTrace();

        }

      }

    });

    /* 停止 */

    myButton2.setOnClickListener(new ImageButton.OnClickListener()

    {

      @Override

      public void onClick(View arg0)

      {

        // TODO Auto-generated method stub

        if (myRecAudioFile != null)

        {

          /* 停止录音 */

          mMediaRecorder01.stop();

          mMediaRecorder01.release();



          mMediaRecorder01 = null;



          /* 将录音频文件名给Adapter */

          adapter.add(myRecAudioFile.getName());

          myTextView1.setText("停止：" + myRecAudioFile.getName());

          myButton2.setEnabled(false);



          isStopRecord = true;

        }

      }

    });

    /* 播放 */

    myButton3.setOnClickListener(new ImageButton.OnClickListener()

    {

      @Override

      public void onClick(View arg0)

      {

        // TODO Auto-generated method stub

        //if (myPlayFile != null && myPlayFile.exists())

        //{

          /* 打开播放的程序 */

         // openFile(myPlayFile);

          System.out.println("_________________"+myRecAudioFile.getAbsolutePath());

            //这里我们也可以加个判断:

            //if(是否存在音频文件) myRecAudioFile.exists()

          openFile(myRecAudioFile);

          

        //}

      }

    });

    /* 删除 */

    myButton4.setOnClickListener(new ImageButton.OnClickListener()

    {

      @Override

      public void onClick(View arg0)

      {

        // TODO Auto-generated method stub

        if (myPlayFile != null)

        {

          /* 先将Adapter删除文件名 */

          adapter.remove(myPlayFile.getName());

          /* 删除文件 */

          if (myPlayFile.exists())

            myPlayFile.delete();

          myTextView1.setText("完成删除");

        }

      }

    });



    myListView1

        .setOnItemClickListener(new AdapterView.OnItemClickListener()

        {

          @Override

          public void onItemClick(AdapterView<?> arg0, View arg1,

              int arg2, long arg3)

          {

            /* 当有点击档名时将删除及播放按钮Enable */

            myButton3.setEnabled(true);

            myButton4.setEnabled(true);



            System.out.println("_______________"

                + myRecAudioDir.getAbsolutePath());

//            myPlayFile = new File(myRecAudioDir.getAbsolutePath()

//                + File.separator

//                + ((CheckedTextView) arg1).getText());

            myTextView1.setText("你选的是："

                + ((CheckedTextView) arg1).getText());

          }

        });

  }



  @Override

  protected void onStop()

  {

    if (mMediaRecorder01 != null && !isStopRecord)

    {

      /* 停止录音 */

      mMediaRecorder01.stop();

      mMediaRecorder01.release();

      mMediaRecorder01 = null;

    }

    super.onStop();

  }



  // 存储一个音频文件数组到list当中

  private void getRecordFiles()

  {

    recordFiles = new ArrayList<String>();

    if (sdCardExit)

    {

      File files[] = myRecAudioDir.listFiles();

      if (files != null)

      {

        for (int i = 0; i < files.length; i++)

        {

          if (files[i].getName().indexOf(".") >= 0)

          {

            /* 只取.amr文件 */

            String fileS = files[i].getName().substring(

                files[i].getName().indexOf("."));

            if (fileS.toLowerCase().equals(".amr"))

              recordFiles.add(files[i].getName());

          }

        }

      }

    }

  }



  /* 打开播放录音文件的程序 */

  private void openFile(File f)

  {

    Intent intent = new Intent();

    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

    intent.setAction(android.content.Intent.ACTION_VIEW);

    String type = getMIMEType(f);

    intent.setDataAndType(Uri.fromFile(f), type);

    startActivity(intent);

  }



  private String getMIMEType(File f)

  {

    String end = f

        .getName()

        .substring(f.getName().lastIndexOf(".") + 1,

            f.getName().length()).toLowerCase();

    String type = "";

    if (end.equals("mp3") || end.equals("aac") || end.equals("aac")

        || end.equals("amr") || end.equals("mpeg")

        || end.equals("mp4"))

    {

      type = "audio";

    } else if (end.equals("jpg") || end.equals("gif")

        || end.equals("png") || end.equals("jpeg"))

    {

      type = "image";

    } else

    {

      type = "*";

    }

    type += "/*";

    return type;

  }

}

 

布局文件main.xml

View Code

 1 <?xml version="1.0" encoding="utf-8"?>

 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

 3     android:orientation="vertical" android:layout_width="fill_parent"

 4     android:layout_height="fill_parent" android:background="@drawable/white">

 5     <LinearLayout android:id="@+id/LinearLayout01"

 6         android:layout_width="wrap_content" android:layout_height="wrap_content">

 7         <ImageButton android:id="@+id/ImageButton01"

 8             android:layout_width="wrap_content" android:layout_height="wrap_content"

 9             android:src="@drawable/record">

10         </ImageButton>

11         <ImageButton android:id="@+id/ImageButton02"

12             android:layout_width="wrap_content" android:layout_height="wrap_content"

13             android:src="@drawable/stop">

14         </ImageButton>

15         <ImageButton android:id="@+id/ImageButton03"

16             android:layout_width="wrap_content" android:layout_height="wrap_content"

17             android:src="@drawable/play">

18         </ImageButton>

19         <ImageButton android:id="@+id/ImageButton04"

20             android:layout_width="wrap_content" android:layout_height="wrap_content"

21             android:src="@drawable/delete">

22         </ImageButton>

23     </LinearLayout>

24     <TextView android:id="@+id/TextView01" android:layout_width="wrap_content"

25         android:layout_height="wrap_content" android:textColor="@drawable/black">

26     </TextView>

27     <ListView android:id="@+id/ListView01" android:layout_width="wrap_content"

28         android:layout_height="wrap_content" android:background="@drawable/black">

29     </ListView>

30 </LinearLayout>

my_simple_list_item.xml文件

View Code

1 <?xml version="1.0" encoding="utf-8"?>

2 <CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"

3     android:id="@+id/myCheckedTextView1" android:layout_width="fill_parent"

4     android:layout_height="fill_parent" android:textColor="@drawable/white" /> 

权限设置

<uses-permission android:name="android.permission.RECORD_AUDIO" />