Android Open Source - unmp Playlist

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Back to project page unmp.

License

The source code is released under:

MIT License

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Java Source Code

package com.parnswir.unmp.playlist;
//from w w  w .  j a v  a 2s. c o m
import java.util.ArrayList;
import java.util.Random;

import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;


public class Playlist extends PlaylistElement {
  
  private static final long serialVersionUID = 3196172024840309061L;
  
  private String name;
  private int current;
  
  private int cronCurrent;
  private ArrayList<Integer> chronology = new ArrayList<Integer>();
  
  public ArrayList<MediaFile> children = new ArrayList<MediaFile>();
  
  
  public Playlist() {
    chronology.add(0);
    cronCurrent = 0;
  }
  
  public void addItemsFromFilter(SQLiteDatabase db, String query) {
    Cursor cursor = db.rawQuery(query, null);
    boolean successful = cursor.moveToFirst();
    if (successful)
      while (! cursor.isAfterLast()) {
        children.add(new MediaFile(cursor.getString(0)));
        cursor.moveToNext();
      }
    cursor.close();
  }
  
  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public int getPosition() {
    return current;
  }
  
  public void setPosition(int position) {
    current = position;
  }
  
  public void nextSource() {
    cronCurrent += 1;
    if (chronology.size() > cronCurrent) {
      setPosition(chronology.get(cronCurrent));
    } else {
      if (isShuffled()) {
        Random random = new Random();
        setPosition(random.nextInt(children.size()));
      } else {
        setPosition(getPosition() + 1);
      }
      chronology.add(getPosition());
    }
  }
  
  public void previousSource() {
    cronCurrent -= 1;
    if (cronCurrent >= 0 && !chronology.isEmpty()) {
      setPosition(chronology.get(cronCurrent));
    } else {
      if (isShuffled()) {
        Random random = new Random();
        setPosition(random.nextInt(children.size()));
      } else {
        setPosition(getPosition() - 1);
      }
      chronology.add(0, getPosition());
      cronCurrent = 0;
    }
  }
  
  public boolean isAtEnd() {
    return getPosition() >= children.size();
  }
  
  public boolean isAtStart() {
    return getPosition() < 0;
  }
  
  public MediaFile getCurrentChild() {
    if (getPosition() < 0 || getPosition() >= children.size())
      return null;
    return children.get(getPosition());
  }

  @Override
  public String getCurrentFile() {
    if (getCurrentChild() == null) 
      return null;
    return getCurrentChild().getCurrentFile();
  }
  
  public void next() {
    if (isRepeating()) return;
    nextSource();
    if (isAtEnd() && isRepeatingAll()) 
      setPosition(0);
  }
  
  public void previous() {
    if (isRepeating()) return;
    previousSource();
    if (isAtStart() && isRepeatingAll())
      setPosition(children.size() - 1);
  }
  
  @Override
  public void setShuffled(boolean shuffled) {
    while (chronology.size() > cronCurrent + 1)
      chronology.remove(cronCurrent + 1);
    super.setShuffled(shuffled);
  }
}

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