Hello Friends, I make one app in android, in which i take three radio button in radiogroup and take two buttons "play" and "stop". my problem is that when i play the song it is playing well but when i click on stop button and then click on play button then song is not playing, how to do that ? please help me if anybody know. below is code that i write:

 package com.mediaplayer;

import java.io.IOException;

import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;

public class MediaplayerActivity extends Activity implements OnCheckedChangeListener {

MediaPlayer song1,song2,song3;
int whatsong = 0;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);



    RadioGroup rgMusic = (RadioGroup) findViewById(R.id.radioGroup1);

    song1 = MediaPlayer.create(MediaplayerActivity.this, R.raw.fluet);
    song2 = MediaPlayer.create(MediaplayerActivity.this, R.raw.mogra_na_phool);
    song3 = MediaPlayer.create(MediaplayerActivity.this, R.raw.airtel);


    Button bPlay = (Button) findViewById(R.id.bPlay);
    Button bStop = (Button) findViewById(R.id.bStop);

    rgMusic.setOnCheckedChangeListener(this);

    bPlay.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {           

            if(song1.isPlaying())
            {
                song1.pause();
                song1.seekTo(0);
            }

            if(song2.isPlaying())
            {
                song2.pause();
                song2.seekTo(0);
            }

            if(song3.isPlaying())
            {
                song3.pause();
                song3.seekTo(0);
            }

            switch (whatsong) {

            case 1:
                try {
                    song1.prepare();
                } catch (IllegalStateException e) {                 
                    e.printStackTrace();
                } catch (IOException e) {                   
                    e.printStackTrace();
                }
                song1.start();
                break;  

            case 2:
                try {
                    song2.prepare();
                } catch (IllegalStateException e) {                 
                    e.printStackTrace();
                } catch (IOException e) {                   
                    e.printStackTrace();
                }
                song2.start();
                break;

            case 3:
                try {
                    song3.prepare();
                } catch (IllegalStateException e) {                     
                    e.printStackTrace();
                } catch (IOException e) {               
                    e.printStackTrace();
                }
                song3.start();
                break;
            }
        }
    });

    bStop.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {       

            switch (whatsong) {

            case 1:
                song1.stop();
                break;  

            case 2:
                song2.stop();
                break;

            case 3:
                song3.stop();
                break;
            }           
        }
    });                                      
}

@Override
public void onCheckedChanged(RadioGroup group, int rbId) {      

    switch (rbId) {
    case R.id.rbMusic1:
        whatsong = 1;           
        break;
    case R.id.rbMusic2:
        whatson开发者_运维问答g = 2;           
        break;
    case R.id.rbMusic3:
        whatsong = 3;           
        break;

    }

}

}

now use this edited code. This code will help you. If it is not running properly inform me.

package com.mediaplayer;

import java.io.IOException;
import java.util.ArrayList;

import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;

public class MediaplayerActivity extends Activity implements OnCheckedChangeListener {

MediaPlayer song1;
int whatsong = 0;

private ArrayList<Integer> songIds;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);



    RadioGroup rgMusic = (RadioGroup) findViewById(R.id.radioGroup1);


    songIds=new ArrayList<Integer>();

    songIds.add(R.raw.fluet);
    songIds.add(R.raw.mogra_na_phool);
    songIds.add(R.raw.airtel);

    song1 = MediaPlayer.create(Nothing.this, R.raw.fluet);


    Button bPlay = (Button) findViewById(R.id.bPlay);
    Button bStop = (Button) findViewById(R.id.bStop);

    rgMusic.setOnCheckedChangeListener(this);

    bPlay.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {           



            if(song1!=null)
            {
               song1.release();
            }


            switch (whatsong) {

            case 1:
                try {
                    song1 = MediaPlayer.create(Nothing.this, songIds.get(0));
                    song1.prepare();
                } catch (IllegalStateException e) {                 
                    e.printStackTrace();
                } catch (IOException e) {                   
                    e.printStackTrace();
                }
                song1.start();
                break;  

            case 2:
                try {
                    song1 = MediaPlayer.create(Nothing.this, songIds.get(1));
                    song1.prepare();
                } catch (IllegalStateException e) {                 
                    e.printStackTrace();
                } catch (IOException e) {                   
                    e.printStackTrace();
                }
                song1.start();
                break;

            case 3:
                try {
                    song1 = MediaPlayer.create(Nothing.this, songIds.get(2));
                    song1.prepare();
                } catch (IllegalStateException e) {                     
                    e.printStackTrace();
                } catch (IOException e) {               
                    e.printStackTrace();
                }
                song1.start();
                break;
            }
        }
    });

    bStop.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {       

           if(song1!=null){
               song1.release();
           }
        }
    });                                      
}

@Override
public void onCheckedChanged(RadioGroup group, int rbId) {      

    switch (rbId) {
    case R.id.rbMusic1:
        whatsong = 1;           
        break;
    case R.id.rbMusic2:
        whatsong = 2;           
        break;
    case R.id.rbMusic3:
        whatsong = 3;           
        break;

    }

}

}

this problem is raise because you just detect whether song is play ? but you have also detect with true or false ?

like ::

if(song1.isPlaying()==true)
 {
    song1.pause(); //or
    song1.stop():
 }
 else{
       song1.start();
     }

Update

for pausing the mediaplayer i used...

Mediaplayer.pause();
length=Mediaplayer.getCurrentPosition();

and for resuming the player from the position wer it stopped lately is by......

Mediaplayer.seekTo(length);
Mediaplayer.start();

for pausing and resuming media player you use this. i think it helped you.

if(song1.isPlaying()==true)
{
   Mediaplayer.pause();
   length=Mediaplayer.getCurrentPosition();
}

else
{
  Mediaplayer.seekTo(length);
  Mediaplayer.start();
}

         mp.stop();
            try {
                mp.prepare();
            } catch (IllegalStateException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            mp.seekTo(0);