Android实现自制录音/播放录音程序

首先，让我们先看下实现的截图：

当有录音文件存在时，会显示在下面的ListView当中。

下面给出实现的完整代码：

1.主程序代码

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;    private File myPlayFile;    private MediaRecorder mMediaRecorder01;      private ArrayList<String> recordFiles;    private ArrayAdapter<String> adapter;    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);        myButton1 = (ImageButton) findViewById(R.id.ImageButton01);      myButton2 = (ImageButton) findViewById(R.id.ImageButton02);      myButton3 = (ImageButton) findViewById(R.id.ImageButton03);      myButton4 = (ImageButton) findViewById(R.id.ImageButton04);      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路径做为录音的文件位置 */      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存入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;            }              /* 建立录音档 */            myRecAudioFile = File.createTempFile(strTempFile, ".amr",                myRecAudioDir);              mMediaRecorder01 = new MediaRecorder();            /* 设定录音来源为麦克风 */            mMediaRecorder01                .setAudioSource(MediaRecorder.AudioSource.MIC);            mMediaRecorder01                .setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);            mMediaRecorder01                .setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);              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();            /* 将录音文件名给Adapter */            adapter.add(myRecAudioFile.getName());            mMediaRecorder01.release();            mMediaRecorder01 = null;            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())          {            /* 开启播放的程序 */            openFile(myPlayFile);          }          }      });      /* ?除 */      myButton4.setOnClickListener(new ImageButton.OnClickListener()      {          @Override        public void onClick(View arg0)        {          // TODO Auto-generated method stub          if (myPlayFile != null)          {            /* 因将Adapter移除文件名 */            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)            {              /* 当有点选文件名时将删除及播放按钮Enable */              myButton3.setEnabled(true);              myButton4.setEnabled(true);                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();    }      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)            {              /* 读取.amr文件 */              String fileS = files[i].getName().substring(                  files[i].getName().indexOf("."));              if (fileS.toLowerCase().equals(".amr"))                recordFiles.add(files[i].getName());              }          }        }      }    }      /* 开启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;    }  }

2.总体布局文件代码

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout     xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"     android:background="@drawable/white">    <LinearLayout     android:id="@+id/LinearLayout01"     android:layout_width="wrap_content"     android:layout_height="wrap_content">    <ImageButton     android:id="@+id/ImageButton01"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:src="@drawable/record">    </ImageButton>    <ImageButton     android:id="@+id/ImageButton02"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:src="@drawable/stop">    </ImageButton>    <ImageButton     android:id="@+id/ImageButton03"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:src="@drawable/play">    </ImageButton>    <ImageButton     android:id="@+id/ImageButton04"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:src="@drawable/delete">    </ImageButton>    </LinearLayout>    <TextView     android:id="@+id/TextView01"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:textColor="@drawable/black">    </TextView>    <ListView     android:id="@+id/ListView01"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:background="@drawable/black">    </ListView>  </LinearLayout>

3.ListView中的子View的布局

<?xml version="1.0" encoding="utf-8"?>   <CheckedTextView     xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/myCheckedTextView1"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:textColor="@drawable/white"/> 

来自：http://blog.csdn.net/dlutbrucezhang/article/details/8570490