Android Play mp3 เล่น Music media ไฟล์ mp3 และไฟล์อื่น ๆ ด้วย MediaPlayer

package com.myapp;

import java.util.ArrayList;
import java.util.HashMap;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.TextView;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;

public class MainActivity extends Activity {

	ArrayList<HashMap<String, String>> MyArrList;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
    	MyArrList = new ArrayList<HashMap<String, String>>();
		HashMap<String, String> map;
		
		/*** Rows 1 ***/
		map = new HashMap<String, String>();
		map.put("MusicID", "1");
		map.put("MusicName", "Usher Feat Pitbull Ludacris");
		map.put("MusicPath", "music1.mp3");
		MyArrList.add(map);
		
		/*** Rows 2 ***/
		map = new HashMap<String, String>();
		map.put("MusicID", "2");
		map.put("MusicName", "Jeremih Featuring Chris Brown");
		map.put("MusicPath", "music2.mp3");
		MyArrList.add(map);	
		
		/*** Rows 3 ***/
		map = new HashMap<String, String>();
		map.put("MusicID", "3");
		map.put("MusicName", "Pleasure P Feat Omarion & Drake");
		map.put("MusicPath", "music3.mp3");
		MyArrList.add(map);	
		
		/*** Rows 3 ***/
		map = new HashMap<String, String>();
		map.put("MusicID", "4");
		map.put("MusicName", "R.Kelly Feat Keri Hilson");
		map.put("MusicPath", "music4.mp3");
		MyArrList.add(map);		
		
        // listView1
        final ListView lstView1 = (ListView)findViewById(R.id.listView1); 
        	
        lstView1.setAdapter(new ImageAdapter(this));
      
    }
             
    
    public class ImageAdapter extends BaseAdapter 
    {
        private Context context;

        public ImageAdapter(Context c) 
        {
        	// TODO Auto-generated method stub
            context = c;
        }
 
        public int getCount() {
        	// TODO Auto-generated method stub
            return MyArrList.size();
        }
 
        public Object getItem(int position) {
        	// TODO Auto-generated method stub
            return position;
        }
 
        public long getItemId(int position) {
        	// TODO Auto-generated method stub
            return position;
        }
		public View getView(final int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			
			LayoutInflater inflater = (LayoutInflater) context
					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		 
			if (convertView == null) {
				convertView = inflater.inflate(R.layout.activity_column, null); 
			}


			//imgCmdPlay
			ImageButton cmdPlay = (ImageButton) convertView.findViewById(R.id.imgCmdPlay);
			cmdPlay.setBackgroundColor(Color.TRANSPARENT);
			cmdPlay.setOnClickListener(new View.OnClickListener() {
	            public void onClick(View v) {

	            	    Intent newActivity = new Intent(MainActivity.this,PlayActivity.class);
	            	    newActivity.putExtra("vMusicID", MyArrList.get(position).get("MusicID"));
	            	    newActivity.putExtra("vMusicName", MyArrList.get(position).get("MusicName"));
	            	    newActivity.putExtra("vMusicPath", MyArrList.get(position).get("MusicPath"));
	            	    startActivity(newActivity);

	            }
	        });
			
			// ColID
			TextView txtID = (TextView) convertView.findViewById(R.id.ColID);
			txtID.setPadding(10, 0, 0, 0);
			txtID.setText(MyArrList.get(position).get("MusicID") +".");
			
			// ColMusic
			TextView txtMusic = (TextView) convertView.findViewById(R.id.ColMusic);
			txtMusic.setPadding(5, 0, 0, 0);
			txtMusic.setText(MyArrList.get(position).get("MusicName"));
					
		 
			return convertView;
				
		}

    } 
    
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

}

package com.myapp;


import java.io.IOException;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.Button;
import android.view.MotionEvent;
import android.widget.SeekBar;
import android.widget.TextView;

public class PlayActivity extends Activity {

	private MediaPlayer mMedia;
	private Handler handler = new Handler();
	private SeekBar seekBar;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_play);
        
        if(mMedia != null){
       	 mMedia.release();  
        }
        
        Intent intent= getIntent();
        final String MusicID = intent.getStringExtra("vMusicID"); 
        final String MusicName = intent.getStringExtra("vMusicName"); 
        final String MusicPath = intent.getStringExtra("vMusicPath"); 

        
        final TextView txtView = (TextView)findViewById(R.id.textView1);
        txtView.setText("(" + MusicID + ")" + MusicName);
        
        /* Resource in R.
         * mMedia = MediaPlayer.create(this, R.raw.music);
         * mMedia.start();
         */
        
        /*
         * from DataSource
         * mMedia = new MediaPlayer();
         * mMedia.setDataSource("https://www.thaicreate.com/music/mymusic.mp3");
         * mMedia.start();
         * 
         */
        mMedia = new MediaPlayer();
        try {
        	Log.d("Path","/mnt/sdcard/mymusic/" + MusicPath);
			mMedia.setDataSource("/mnt/sdcard/mymusic/" + MusicPath);
			mMedia.prepare();
		
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
            
        seekBar = (SeekBar)findViewById(R.id.seekBar1);
        seekBar.setMax(mMedia.getDuration());
        seekBar.setOnTouchListener(new OnTouchListener() {
        	public boolean onTouch(View v, MotionEvent event) {
        		UpdateseekChange(v);
			return false; 
			}
		});

        
        final Button btn1 = (Button) findViewById(R.id.button1); // Start
        final Button btn2 = (Button) findViewById(R.id.button2); // Pause
        final Button btn3 = (Button) findViewById(R.id.button3); // Stop
        final Button btn4 = (Button) findViewById(R.id.button4); // Back
        
        
        // Start
        btn1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	txtView.setText("Playing music...");
            	mMedia.start();
            	startPlayProgressUpdater();
            	btn1.setEnabled(false);
            	btn2.setEnabled(true);
            	btn3.setEnabled(true);
            }
        });
        
        // Pause
        btn2.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	txtView.setText("Pause!");
            	mMedia.pause();
            	btn1.setEnabled(true);
            	btn2.setEnabled(false);
            	btn3.setEnabled(false);
            }
        });  
        
        // Stop
        btn3.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	txtView.setText("Stop!");
            	mMedia.stop();
            	btn1.setEnabled(true);
            	btn2.setEnabled(false);
            	btn3.setEnabled(false);
            	try {
					mMedia.prepare();
					mMedia.seekTo(0);
				} catch (IllegalStateException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
            	
            }
        }); 
        
        // Back
        btn4.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	if(mMedia.isPlaying()){
            		mMedia.stop();
        		}
        	    Intent newActivity = new Intent(PlayActivity.this,MainActivity.class);
        	    startActivity(newActivity);	
            }
        }); 
        
    }
    
    private void UpdateseekChange(View v){
    	if(mMedia.isPlaying()){
	    	SeekBar sb = (SeekBar)v;
	    	mMedia.seekTo(sb.getProgress());
		}
    }
    
    public void startPlayProgressUpdater() {
    	seekBar.setProgress(mMedia.getCurrentPosition());

		if (mMedia.isPlaying()) {
			Runnable notification = new Runnable() {
		        public void run() {
		        	startPlayProgressUpdater();
				}
		    };
		    handler.postDelayed(notification,1000);
    	}
    } 
    
    
    @Override
    protected void onDestroy() {
   // TODO Auto-generated method stub
     super.onDestroy();
     if(mMedia != null){
    	 mMedia.release();  
     }
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
	
}

		<activity 
		    android:name="PlayActivity"
		    android:theme="@style/AppTheme"
		    android:screenOrientation="portrait"            
		    android:label="@string/title_activity_main" />