Android Open Source - MOA-Player Main Activity

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Back to project page MOA-Player.

License

The source code is released under:

MIT License

Java Source Code

/*
 * http://code.tutsplus.com/tutorials/create-a-music-player-on-android-project-setup--mobile-22764
 * http://code.tutsplus.com/tutorials/create-a-music-player-on-android-song-playback--mobile-22778
 * http://code.tutsplus.com/tutorials/create-a-music-player-on-android-user-controls--mobile-22787
 *//*from   w ww  . j  a v  a  2  s  .c  o m*/

package us.reimus.moaplayer;

import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;

import us.reimus.moaplayer.MusicService.MusicBinder;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.IBinder;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.ListView;
import android.widget.MediaController.MediaPlayerControl;
//import android.support.v7.app.ActionBarActivity;

public class MainActivity extends Activity implements MediaPlayerControl {
  private ArrayList<Song> songList;     // Used to store songs.
  private ArrayList<String> directoryList; // Used to store directories.
  private ListView songView;         // Used to display song.
  private ListView directoryView;       // Used to display directories.
  private MusicService musicSrv;
  private Intent playIntent;
  private boolean musicBound = false;
  private MusicController controller;
  private boolean paused = false;
  private boolean playbackPaused = false;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    // Get, sort, and display songs.
    songView = (ListView)findViewById(R.id.song_list);
    songList = new ArrayList<Song>();
    getSongList();
    Collections.sort(songList, new Comparator<Song>() {
      public int compare(Song a, Song b){
          return a.getTitle().compareTo(b.getTitle());
        }
    });
    
    // Setup the ability to play songs.
    SongAdapter songAdt = new SongAdapter(this, songList);
    songView.setAdapter(songAdt);
    
    // Setup a listview for the directories. Get the directories. Setup the handling of directories.
    directoryView = (ListView)findViewById(R.id.directory_list);
    directoryView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
    directoryList = new ArrayList<String>();
    getDirectoryList();
    DirectoryAdapter directoryAdt = new DirectoryAdapter(this, directoryList);
    directoryView.setAdapter(directoryAdt);
    
    setController();
  }
  
  @Override
  protected void onStart() {
    super.onStart();
    if(playIntent==null){
      playIntent = new Intent(this, MusicService.class);
      bindService(playIntent, musicConnection, Context.BIND_AUTO_CREATE);
      startService(playIntent);
    }
  }
  
  // Connect to the MusicService.
  private ServiceConnection musicConnection = new ServiceConnection() {
    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
      MusicBinder binder = (MusicBinder)service;
      musicSrv = binder.getService(); // Get service
      musicSrv.setList(songList); // Pass the list.
      musicBound = true; 
    }
    
    @Override
    public void onServiceDisconnected(ComponentName name) {
      musicBound = false;
    }
  };

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    MenuInflater inflater = getMenuInflater();
      inflater.inflate(R.menu.main_activity_actions, menu);
      return super.onCreateOptionsMenu(menu);
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    switch (item.getItemId()) {
    case R.id.action_shuffle:
      musicSrv.setShuffle();
      break;
    case R.id.action_end:
      stopService(playIntent);
      musicSrv=null;
      System.exit(0);
      break;
    }
    
    return super.onOptionsItemSelected(item);
  }
  
  @Override
  protected void onDestroy() {
    stopService(playIntent);
    musicSrv=null;
    super.onDestroy();
  }
  
  public void getSongList() {
    ArrayList<String> fileList = new ArrayList<String>();
    // Retrieve song info.
    // Queries the Music Files.
    Uri musicUri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
    Cursor musicCursor = getMusicCursor(this, null, musicUri, "Music");
    
    // Iterate through music.
    if (musicCursor!=null && musicCursor.moveToFirst()) {
      // Get columns
      int titleColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media.TITLE);
      int idColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media._ID);
      int artistColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media.ARTIST);
      
      // Get ArrayList of file locations
      fileList = getRealPathFromURI(this, musicUri);
      
      // Add songs to list.
      int i = 0;
      do {
        long thisId = musicCursor.getLong(idColumn);
        String thisTitle = musicCursor.getString(titleColumn);
        String thisArtist = musicCursor.getString(artistColumn);
        String thisFile = fileList.get(i);
        songList.add(new Song(thisId, thisTitle, thisArtist, thisFile));
        i++;
      } while (musicCursor.moveToNext());
    }

  }
  
  private Cursor getMusicCursor(Context context, String[] projection, Uri contentUri, String searchDir) {
    Cursor cursor = null;
    String searchString = android.provider.MediaStore.Audio.Media.DATA + " LIKE '%" + searchDir + "%'";
    
    try {
      cursor = context.getContentResolver().query(
          contentUri,
          projection,
          searchString,
          null,      // I cannot get searchArgs to work. App crashes when String[] used.
          null);

      return cursor;
    } finally {
      if (cursor != null) {
        //cursor.close();
      }
    }
  }
  
  // From: http://stackoverflow.com/questions/3401579/get-filename-and-path-from-uri-from-mediastore
  private ArrayList<String> getRealPathFromURI(Context context, Uri contentUri) {
    String[] projection = { android.provider.MediaStore.Audio.Media.DATA };
    Cursor cursor = getMusicCursor(context, projection, contentUri, "Music");
    ArrayList<String> array = new ArrayList<String>();
    int column_index = cursor.getColumnIndexOrThrow(android.provider.MediaStore.Audio.Media.DATA);
      
    do {
      array.add(cursor.getString(column_index));
    } while (cursor.moveToNext());
    
    return array;
  }
  
  public void getDirectoryList() {
    File sdcard = Environment.getExternalStorageDirectory();
    File f = new File(sdcard, "Music/");
    File[] files = f.listFiles();
    for (File inFile : files) {
      if (inFile.isDirectory()) {
        directoryList.add(inFile.getName());
      }
    }
  }
  
  public void songPicked(View view) {
    musicSrv.setSong(Integer.parseInt(view.getTag().toString()));
    musicSrv.playSong();
    if (playbackPaused) {
      setController();
      playbackPaused = false;
    }
    controller.show();
  }
  
  public void directoryPicked(View view) {
    int selectedDirectory = Integer.parseInt(view.getTag().toString());

    directoryView.requestFocusFromTouch();
    directoryView.setSelection(selectedDirectory);
    musicSrv.setDirectory(directoryList.get(selectedDirectory));
  }

  @Override
  public void start() {
    musicSrv.go();    
  }

  @Override
  public void pause() {
    playbackPaused = true;
    musicSrv.pausePlayer();
  }

  @Override
  public int getDuration() {
    // The conditional tests are to avoid various exceptions 
    // that may occur when using the MediaPlayer and MediaController 
    // classes.
    if (musicSrv != null && musicBound && musicSrv.isPng())
      return musicSrv.getDur();
    else return 0;
  }

  @Override
  public int getCurrentPosition() {
    // The conditional tests are to avoid various exceptions 
    // that may occur when using the MediaPlayer and MediaController 
    // classes.
    if (musicSrv != null && musicBound && musicSrv.isPng())
      return musicSrv.getPosn();
    else return 0;
  }

  @Override
  public void seekTo(int pos) {
    musicSrv.seek(pos);
  }

  @Override
  public boolean isPlaying() {
    if (musicSrv != null && musicBound)
      return musicSrv.isPng();
    return false;
  }

  @Override
  public int getBufferPercentage() {
    // TODO Auto-generated method stub
    return 0;
  }

  @Override
  public boolean canPause() {
    return true;
  }

  @Override
  public boolean canSeekBackward() {
    // TODO Auto-generated method stub
    return true;
  }

  @Override
  public boolean canSeekForward() {
    // TODO Auto-generated method stub
    return true;
  }
  
  private void setController(){
    // Sets the controller up.
    controller = new MusicController(this);
    
    // Add listeners for the click events on the next and prev buttons.
    controller.setPrevNextListeners(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        playNext();
      }
    }, new View.OnClickListener() {
      @Override
      public void onClick(View v) {
          playPrev();
      }
    });
    
    // Setup controller to work on media playback.
    controller.setMediaPlayer(this);
    controller.setAnchorView(findViewById(R.id.song_list));
    controller.setEnabled(true);
  }
  
  private void playNext() {
    musicSrv.playNext();
    if (playbackPaused) {
      setController();
      playbackPaused = false;
    }
    controller.show();
  }
   
  private void playPrev() {
    musicSrv.playPrev();
    if (playbackPaused) {
      setController();
      playbackPaused = false;
    }
    controller.show();
  }
  
  @Override
  protected void onPause() {
    super.onPause();
    paused = true;
  }
  
  @Override
  protected void onResume() {
    super.onResume();
    if (paused) {
      setController();
      paused = false;
    }
  }
  
  @Override
  protected void onStop() {
    controller.hide();
    super.onStop();
  }
}

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