Android实现自制和播放录音程序

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; }}

<?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>

<?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"/>