SongListAdapter.java

package com.architjn.acjmusicplayer.utils.adapters;

import android.animation.ArgbEvaluator;
import android.animation.ValueAnimator;
import android.content.Context;
import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.PopupMenu;
import android.support.v7.widget.RecyclerView;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.DecelerateInterpolator;
import android.widget.ImageView;
import android.widget.TextView;

import com.afollestad.async.Action;
import com.architjn.acjmusicplayer.R;
import com.architjn.acjmusicplayer.service.PlayerService;
import com.architjn.acjmusicplayer.ui.layouts.activity.MainActivity;
import com.architjn.acjmusicplayer.ui.layouts.fragments.SongsListFragment;
import com.architjn.acjmusicplayer.utils.ListSongs;
import com.architjn.acjmusicplayer.utils.PermissionChecker;
import com.architjn.acjmusicplayer.utils.Utils;
import com.architjn.acjmusicplayer.utils.items.Song;
import com.squareup.picasso.Picasso;

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

/**
 * Created by architjn on 28/11/15.
 */
public class SongListAdapter extends RecyclerView.Adapter<SongListAdapter.SimpleItemViewHolder> {

    private static final String TAG = "SongListAdapter-TAG";
    private ArrayList<Song> items;
    private PermissionChecker permissionChecker;
    private int selectedSongId = -1;
    private SimpleItemViewHolder selectedHolder;
    private Context context;
    private SongsListFragment fragment;

    public SongListAdapter(Context context, SongsListFragment fragment,
                           ArrayList<Song> items, PermissionChecker permissionChecker) {
        this.context = context;
        this.fragment = fragment;
        this.items = items;
        this.permissionChecker = permissionChecker;
    }

    @Override
    public SongListAdapter.SimpleItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext()).
                inflate(R.layout.songs_list_item, parent, false);
        return new SimpleItemViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(final SongListAdapter.SimpleItemViewHolder holder, final int position) {
        holder.name.setText(items.get(position).getName());
        holder.artistName.setText(items.get(position).getArtist());
        holder.mainView.setElevation(0);
        setAlbumArt(position, holder);
        if (selectedHolder != null)
            selectedHolder.mainView.setBackgroundColor(ContextCompat
                    .getColor(context, R.color.appBackground));
        selectedSongId = -1;
        selectedHolder = null;
        setOnClicks(holder, position);
    }

    private void setAlbumArt(int position, SimpleItemViewHolder holder) {
        String path = ListSongs.getAlbumArt(context,
                items.get(position).getAlbumId());
        if (path != null)
            Picasso.with(context).load(new File(path)).resize(dpToPx(50),
                    dpToPx(50)).centerCrop().into(holder.img);
        else
            setDefaultArt(holder, dpToPx(50));
    }

    private void setDefaultArt(SimpleItemViewHolder holder, int size) {
        holder.img.setImageBitmap(new Utils(context).getBitmapOfVector(R.drawable.default_art,
                size, size));
    }

    private void setOnClicks(final SimpleItemViewHolder holder, final int position) {
        holder.mainView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //Play all the songs starting from this
                animate(holder);
                Intent i = new Intent();
                i.setAction(PlayerService.ACTION_PLAY_ALL_SONGS);
                i.putExtra("songId", items.get(position).getSongId());
                i.putExtra("pos", position);
                context.sendBroadcast(i);
//                }
            }
        });
        holder.menu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                PopupMenu pm = new PopupMenu(context, view);
                final Intent intent = new Intent();
                pm.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                    @Override
                    public boolean onMenuItemClick(MenuItem item) {
                        new Utils(context).handleSongMenuClick(item, items,
                                intent, position, fragment.getActivity(), permissionChecker);
                        items = ListSongs.getSongList(context);
                        notifyDataSetChanged();
                        return false;
                    }
                });
                pm.inflate(R.menu.popup_song);
                pm.show();
            }
        });
    }

    public void animate(final SimpleItemViewHolder holder) {
        //using action for smooth animation
        new Action() {

            @NonNull
            @Override
            public String id() {
                return TAG;
            }

            @Nullable
            @Override
            protected Object run() throws InterruptedException {
                return null;
            }

            @Override
            protected void done(@Nullable Object result) {
                animateElevation(0, dpToPx(4), holder);
                animateElevation(dpToPx(4), 0, holder);
            }
        }.execute();
    }

    public int dpToPx(int dp) {
        DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
        return Math.round(dp * (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
    }

    @Override
    public void onViewRecycled(SimpleItemViewHolder holder) {
        super.onViewRecycled(holder);
        holder.img.setImageDrawable(null);
    }

    @Override
    public int getItemCount() {
        return items.size();
    }

    private ValueAnimator animateElevation(int from, int to, final SimpleItemViewHolder holder) {
        Integer elevationFrom = from;
        Integer elevationTo = to;
        ValueAnimator colorAnimation =
                ValueAnimator.ofObject(
                        new ArgbEvaluator(), elevationFrom, elevationTo);
        colorAnimation.setInterpolator(new DecelerateInterpolator());
        colorAnimation.addUpdateListener(
                new ValueAnimator.AnimatorUpdateListener() {
                    @Override
                    public void onAnimationUpdate(ValueAnimator animator) {
                        holder.mainView.setElevation(
                                (Integer) animator.getAnimatedValue());
                    }

                });
        colorAnimation.setDuration(500);
        if (from != 0)
            colorAnimation.setStartDelay(colorAnimation.getDuration() + 300);
        colorAnimation.start();
        return colorAnimation;
    }

    public void recyclerScrolled() {
        if (selectedHolder != null && selectedSongId != -1) {
            animateElevation(12, 0, selectedHolder);
            selectedSongId = -1;
            selectedHolder.mainView.setBackgroundColor(ContextCompat
                    .getColor(context, R.color.appBackground));
        }
    }

    public void onBackPressed() {
        if (selectedSongId != -1) {
            animateElevation(12, 0, selectedHolder);
            selectedHolder.mainView.setBackgroundColor(ContextCompat
                    .getColor(context, R.color.appBackground));
            selectedSongId = -1;
            selectedHolder = null;
        } else {
            if ((fragment.getActivity()) != null)
                ((MainActivity) fragment.getActivity()).killActivity();
        }
    }

    public class SimpleItemViewHolder extends RecyclerView.ViewHolder {

        public TextView name, artistName;
        public View mainView, menu;
        public ImageView img;

        public SimpleItemViewHolder(View itemView) {
            super(itemView);
            mainView = itemView;
            img = (ImageView) itemView.findViewById(R.id.song_item_img);
            name = (TextView) itemView.findViewById(R.id.song_item_name);
            menu = itemView.findViewById(R.id.song_item_menu);
            artistName = (TextView) itemView.findViewById(R.id.song_item_artist);
        }
    }


}