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"/> 4.除了这些，我们还需要加入读取Sd的权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>