MainActivity.java

package com.wigwamlabs.spotify.app;

import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SeekBar;
import android.widget.TextView;

import com.wigwamlabs.spotify.NativeItem;
import com.wigwamlabs.spotify.Playlist;
import com.wigwamlabs.spotify.PlaylistContainer;
import com.wigwamlabs.spotify.PlaylistQueue;
import com.wigwamlabs.spotify.Session;
import com.wigwamlabs.spotify.ui.PlaylistAdapter;
import com.wigwamlabs.spotify.ui.PlaylistContainerAdapter;
import com.wigwamlabs.spotify.ui.SpotifyPlayerActivity;

public class MainActivity extends SpotifyPlayerActivity {
    private TextView mConnectionState;
    private PlaylistContainer mPlaylistContainer;
    private ListView mPlaylistsList;
    private Playlist mPlaylist;
    private ListView mPlaylistList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mConnectionState = (TextView) findViewById(R.id.connectionState);

        mPlaylistsList = (ListView) findViewById(R.id.playlists);
        mPlaylistsList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                onPlaylistClicked(((PlaylistContainerAdapter) parent.getAdapter()).getItem(position));
            }
        });

        mPlaylistList = (ListView) findViewById(R.id.playlist);
        mPlaylistList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                onTrackClicked(position);
            }
        });

        setTrackArtists((TextView) findViewById(R.id.trackArtists));
        setTrackName((TextView) findViewById(R.id.trackName));
        setTrackProgress((SeekBar) findViewById(R.id.seekBar));
        setResumeButton(findViewById(R.id.resumeButton));
        setPauseButton(findViewById(R.id.pauseButton));
        setNextButton(findViewById(R.id.nextButton));

        bindSpotifyService();
    }

    @Override
    protected void onSpotifySessionAttached(Session spotifySession) {
        super.onSpotifySessionAttached(spotifySession);
        setAutoLogin(true);
    }

    @Override
    protected void onDestroy() {
        if (mPlaylist != null) {
            mPlaylist.destroy();
            mPlaylist = null;
        }
        if (mPlaylistContainer != null) {
            mPlaylistContainer.destroy();
            mPlaylistContainer = null;
        }

        super.onDestroy();
    }

    @Override
    public void onConnectionStateUpdated(int state) {
        super.onConnectionStateUpdated(state);

        final int res;
        switch (state) {
        case Session.CONNECTION_STATE_LOGGED_OUT:
            res = R.string.connectionStateLoggedOut;
            break;
        case Session.CONNECTION_STATE_LOGGED_IN:
            res = R.string.connectionStateLoggedIn;
            break;
        case Session.CONNECTION_STATE_DISCONNECTED:
            res = R.string.connectionStateDisconnected;
            break;
        case Session.CONNECTION_STATE_OFFLINE:
            res = R.string.connectionStateOffline;
            break;
        case Session.CONNECTION_STATE_UNDEFINED:
        default:
            res = R.string.connectionStateUndefined;
            break;
        }
        mConnectionState.setText(res);

        if (state != Session.CONNECTION_STATE_LOGGED_OUT && mPlaylistContainer == null) {
            mPlaylistContainer = getSpotifySession().getPlaylistContainer();
            mPlaylistsList.setAdapter(new PlaylistContainerAdapter(this, mPlaylistContainer));
        }
    }

    private void onPlaylistClicked(NativeItem item) {
        if (item instanceof Playlist) {
            final Playlist playlist = (Playlist) item;

            if (mPlaylist != null) {
                mPlaylist.destroy();
                mPlaylist = null;
            }
            mPlaylist = playlist.clone();
            mPlaylistList.setAdapter(new PlaylistAdapter(this, mPlaylist));
        }
    }

    private void onTrackClicked(int position) {
        //TODO change queue if current queue is using the same playlist, instead of always creating a new queue
        getSpotifyService().setPlayIntent(PendingIntent.getActivity(this, 0, new Intent(this, MainActivity.class), 0));
        getPlayer().play(new PlaylistQueue(mPlaylist, position, false));
    }
}