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Android - Which is best way to store the mp3 files

I am new to android. I am going to develop a simple mp3 application. There will be some mp3 tones in my app. I want to play the tones on click in the list item. Now my question is Which is the best way to store the mp3 files in my app.
1) SQLite
2) XML
3) folder
Please let me some good idea to me.
Thanks in advance.

You have to store them in a folder. There must be any resource the sqlite entrys refer to, because this is just a database. So storing them in a folder is not a question I think...
And XML is used to define UI Things like the interface.
This is because of the Model-View-Controller pattern if you want to know more about that look here
If you safed it in the raw folder(it´s located in the res folder, if you dont have one-> create one) of your project than this should be suitable for you
MediaPlayer mediaPlayer = MediaPlayer.create(context, R.raw.sound_file_1);
mediaPlayer.start();
If you got it somewhere else this should fit your needs
Uri myUri = Uri.parse("/path/to/file.mp3"); // initialize Uri here
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource(getApplicationContext(), myUri);
mediaPlayer.prepare();
mediaPlayer.start();
For more informations about MediaPlayer see here and here

sounds not playing with mediaplayer after playing some sounds

I'm developing an android application which is collection of 100 sound effects.
After I play for instance 25 of the sounds, I can't play anymore and I have to close the application and wait for some minutes then open the application and now I can play other sounds.
final MediaPlayer mp81 = MediaPlayer.create(MainActivity.this, R.raw.a81);
I play the sound using the below code:
mp81.start();
I stop the playing sound using the below code:
mp81.seekTo(0);
I also used stop() method but the problem were still existing.
is there any other method i have to add?

Please note: consider using SoundPool for playing short sounds.
Regarding your use-case: you initialize your MediaPlayer instance using the static create() method which means you create a new MediaPlayer object for each sound instead of reusing an existing instance and just changing the data source. This might negatively affect the performance of your app. I suggest that you create an array of paths to your sounds and then instantiate the MediaPlayer like this:
MediaPlayer mp = new MediaPlayer();
try {
mp.setDataSource(yourArray[x]);
mp.prepare();
mp.start();
} catch(Exception e){
e.printStackTrace();
}
Consult the MediaPlayer Document for more information.

Android : how to play multiple audios using single media player object

I need to create only one media player object Mediaplayer mp = new Mediaplayer();
Using this I need to play multiple audio files one after the other for that i am using handler
and getting the duration.
If i create multiple media player objects it shows error(1, -17)
I also need to display images related to audio files.

Did you rule out SoundPool?
http://developer.android.com/reference/android/media/SoundPool.html
It typically good for short audio clips.

Implement the OnCompletionListener and register it with your MediaPlayer instance.
After the media has been played out it will call this callback method onCompletion
void onCompletion(MediaPlayer mp){
//Here you stop it.
mp.stop();
//Reset the data source path to the new file
mp.setDataSource(<uri>);
mp.prepare(); // or mp.prepareAsync();
// start the mediaplayer after the prepare has completed.
}
Release the mediaplayer instance once you are done playing all the files.

Audio attachment with image in android

I have image is my Draw able folder.When I call this image I want to play an audio also which is in my raw folder.can I do this how??please help me.

You can achieve by creating image button and put image on it. and onClick of that button you can play the music using MediaPlayer api.
Refer this : http://developer.android.com/guide/topics/media/index.html
Example code for Play audio from Raw folder
: http://www.barebonescoder.com/2010/06/android-development-audio-playback-safely/

you can write this code at onResume:
MediaPlayer mp = MediaPlayer.create(getApplicationContext(),
R.raw.name);
mp.start();
while (mp.isPlaying()) { // donothing
}
;
mp.release();

play a simple .wav on a view page?

In android, is there a way I can conditionally play a small .wav file when a layout is displayed to the user (on load), like so:
if (randonGen == 3) {
//play small wav sound here
mTheMessage = (TextView) findViewById(R.id.resultText);
mTheImageButton = (ImageButton) findViewById(R.id.face_image);
mTheImageButton.setBackgroundDrawable(bitDraw);
mThePicture.setImageBitmap(cameraBitmap);
}
Where the code to call my sound.wav from my assets folder is called and played?

Actually - I figured out that a simple Media Play will do the trick with small wavs:
MediaPlayer mp = MediaPlayer.create(this, R.raw.your_wav);
mp.start();

android.media.SoundPool looks like it will do what you want.