QueueFragment.java

package me.devsaki.hentoid.fragments;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.TextView;

import org.greenrobot.eventbus.Subscribe;
import org.greenrobot.eventbus.ThreadMode;

import java.util.ArrayList;
import java.util.List;

import me.devsaki.hentoid.R;
import me.devsaki.hentoid.abstracts.BaseFragment;
import me.devsaki.hentoid.adapters.QueueContentAdapter;
import me.devsaki.hentoid.database.domains.Content;
import me.devsaki.hentoid.enums.StatusContent;
import me.devsaki.hentoid.events.DownloadEvent;
import me.devsaki.hentoid.services.DownloadService;
import me.devsaki.hentoid.util.LogHelper;

/**
 * Created by avluis on 04/10/2016.
 * Presents the list of works currently downloading to the user.
 */
public class QueueFragment extends BaseFragment {
    private static final String TAG = LogHelper.makeLogTag(QueueFragment.class);

    private ListView mListView;
    private TextView mEmptyText;
    private List<Content> contents;
    private Context cxt;

    public static QueueFragment newInstance() {
        return new QueueFragment();
    }

    @Override
    public void onResume() {
        super.onResume();
        update();
    }

    @Subscribe(threadMode = ThreadMode.MAIN)
    public void onDownloadEvent(DownloadEvent event) {
        Double percent = event.percent;
        if (percent >= 0) {
            updatePercent(percent);
        } else {
            update();
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        cxt = getActivity().getApplicationContext();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_queue, container, false);

        mListView = (ListView) rootView.findViewById(android.R.id.list);
        mEmptyText = (TextView) rootView.findViewById(android.R.id.empty);

        ImageButton btnStart = (ImageButton) rootView.findViewById(R.id.btnStart);
        btnStart.setOnClickListener(v -> {
            BaseFragment.getDB().updateContentStatus(StatusContent.DOWNLOADING,
                    StatusContent.PAUSED);
            update();
            Intent intent = new Intent(Intent.ACTION_SYNC, null, cxt,
                    DownloadService.class);
            cxt.startService(intent);
        });
        ImageButton btnPause = (ImageButton) rootView.findViewById(R.id.btnPause);
        btnPause.setOnClickListener(v -> {
            BaseFragment.getDB().updateContentStatus(StatusContent.PAUSED,
                    StatusContent.DOWNLOADING);
            DownloadService.paused = true;
            update();
        });

        return rootView;
    }

    private void updatePercent(double percent) {
        if (contents != null && !contents.isEmpty()) {
            contents.get(0).setPercent(percent);
            LogHelper.d(TAG, percent);
            ((ArrayAdapter) mListView.getAdapter()).notifyDataSetChanged();
        }
    }

    public void update() {
        contents = BaseFragment.getDB().selectContentInQueue();
        if (contents == null) {
            contents = new ArrayList<>();
            mEmptyText.setVisibility(View.VISIBLE);
        } else {
            mEmptyText.setVisibility(View.GONE);
        }
        QueueContentAdapter adapter = new QueueContentAdapter(cxt, contents, QueueFragment.this);
        mListView.setAdapter(adapter);
    }

    @Override
    public boolean onBackPressed() {
        // Let the activity handle it.
        return true;
    }
}