Recording songs in Android...

Package com. king. android. media;

Import java. io. File;
Import java. io. FilenameFilter;
Import java. io. IOException;
Import java. util. ArrayList;
Import java. util. List;

Import android. app. ListActivity;
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. view. View. OnClickListener;
Import android. widget. ArrayAdapter;
Import android. widget. Button;
Import android. widget. ListView;

Import com. king. android. R;

/**

* Description: audio recording.
* Author: Andy. Liu
* Time: 07:27:06
**/
Public class RecordActivity extends ListActivity implements OnClickListener {
// The recorded audio file
Private File mRecAudioFile, mRecAudioPath;

Private MediaRecorder mMediaRecoder; // MediaRecorder object

Private List <String> mMusicList = new ArrayList <String> (); // List of Recording files

Private String strTempFile = "recaudio _"; // temporary file prefix

@ Override
Protected void onCreate (Bundle savedInstanceState ){

Super. onCreate (savedInstanceState );
SetContentView (R. layout. mediarecore_layout );

Button btnOperate = (Button) findViewById (R. id. btnStart );
BtnOperate. setOnClickListener (this );
BtnOperate = (Button) findViewById (R. id. btnStop );
BtnOperate. setOnClickListener (this );
MRecAudioPath = Environment. getExternalStorageDirectory ();

RefreshFile (mRecAudioPath. getAbsolutePath (), ". amr ");
// MusicList ();
}

@ Override
Public void onClick (View v ){
Switch (v. getId ()){
Case R. id. btnStop:
DoStop ();
Break;

Case R. id. btnStart:
DoStart ();
Break;
}
}

// Start recording
Private void doStart (){
Try {
// Create a recording file
MRecAudioFile = File. createTempFile (strTempFile, ". amr", mRecAudioPath );

// Instantiate the MediaRecorder object
MMediaRecoder = new MediaRecorder ();
// Set the microphone
MMediaRecoder. setAudioSource (MediaRecorder. AudioSource. MIC );
// Set the output file format
MMediaRecoder. setOutputFormat (MediaRecorder. OutputFormat. DEFAULT );
// Set the encoding of the audio file
MMediaRecoder. setAudioEncoder (MediaRecorder. AudioEncoder. DEFAULT );
// File output path
MMediaRecoder. setOutputFile (mRecAudioFile. getAbsolutePath ());
// Prepare
MMediaRecoder. prepare ();
// Start
MMediaRecoder. start ();
} Catch (IOException e ){

E. printStackTrace ();
} Finally {
}
}

Private void doStop (){
If (null! = MRecAudioFile ){
MMediaRecoder. stop (); // stop the recording
MMusicList. add (mRecAudioFile. getName ());
ArrayAdapter <String> musicList = new ArrayAdapter <String> (RecordActivity. this, R. layout. list, mMusicList );
SetListAdapter (musicList );
MMediaRecoder. release ();
MMediaRecoder = null;
}
}

/* Play the recording file */
Private void playMusic (File file)
{
Intent intent = new Intent ();
Intent. addFlags (Intent. FLAG_ACTIVITY_NEW_TASK );
Intent. setAction (android. content. Intent. ACTION_VIEW );
/* Set the file type */
Intent. setDataAndType (Uri. fromFile (file), "audio ");
StartActivity (intent );
}
@ Override
/* When we click the list, play the clicked music */
Protected void onListItemClick (ListView l, View v, int position, long id)
{
/* Get the clicked file */
File playfile = new File (mRecAudioPath. getAbsolutePath () + File. separator + mMusicList. get (position ));
/* Play */
PlayMusic (playfile );
}

/**
*
* TODO: playlist
* Author: Andy. Liu
* Create Time: 11:27:26
* TAG:
* Return: void
*/

Public void musicList (){
// Obtain the file at the specified position and display it to the playback list.
File home = mRecAudioPath;
If (home. listFiles (new MusicFilter (). length> 0 ){
For (File file: home. listFiles (new MusicFilter ())){
MMusicList. add (file. getName ());
}
ArrayAdapter <String> musicList = new ArrayAdapter <String> (RecordActivity. this, R. layout. list, mMusicList );
SetListAdapter (musicList );
}
}

/**
*
Recursively retrieve folder files
* TODO: TODO
* Author: Andy. Liu
* Create Time: 11:40:33
* TAG: @ param path: Specifies the file path. Generally, select the root directory.
* TAG: @ param fileType file type.
* Return: void
*/
Public void refreshFile (String path, String fileType ){
File file = new File (path );
File [] files = file. listFiles ();
If (null = files)
Return;

For (int I = 0; I <files. length; I ++ ){
If (files [I]. isDirectory ()){
RefreshFile (files [I]. getAbsolutePath (), fileType); // note the Recursive Method
} Else {
If (files [I]. getName (). endsWith (fileType ))
// AllFiles. add (files [I]);
MMusicList. add (file. getName ());
}
}
}


// Transition file type
Class MusicFilter implements FilenameFilter {

@ Override
Public boolean accept (File dir, String filename ){
Return filename. endsWith (". amr ");
}
}

}