github.daneren2005.dsub.fragments.SelectListFragment.java Source code

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Here is the source code for github.daneren2005.dsub.fragments.SelectListFragment.java

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/*
 This file is part of Subsonic.
    
 Subsonic is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
    
 Subsonic is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
    
 You should have received a copy of the GNU General Public License
 along with Subsonic.  If not, see <http://www.gnu.org/licenses/>.
    
 Copyright 2010 (C) Sindre Mehus
 */
package github.daneren2005.dsub.fragments;

import android.os.Bundle;
import android.support.v4.widget.SwipeRefreshLayout;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import github.daneren2005.dsub.R;
import github.daneren2005.dsub.domain.Genre;
import github.daneren2005.dsub.service.MusicService;
import github.daneren2005.dsub.service.MusicServiceFactory;
import github.daneren2005.dsub.util.BackgroundTask;
import github.daneren2005.dsub.util.Constants;
import github.daneren2005.dsub.util.ProgressListener;
import github.daneren2005.dsub.util.TabBackgroundTask;
import github.daneren2005.dsub.view.GenreAdapter;

public abstract class SelectListFragment<T> extends SubsonicFragment implements AdapterView.OnItemClickListener {
    private static final String TAG = SelectListFragment.class.getSimpleName();
    protected ListView listView;
    protected ArrayAdapter adapter;
    protected BackgroundTask<List<T>> currentTask;
    protected List<T> objects;
    protected boolean serialize = true;

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

        if (bundle != null && serialize) {
            objects = (List<T>) bundle.getSerializable(Constants.FRAGMENT_LIST);
        }
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        if (serialize) {
            outState.putSerializable(Constants.FRAGMENT_LIST, (Serializable) objects);
        }
    }

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

        refreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.refresh_layout);
        refreshLayout.setOnRefreshListener(this);

        listView = (ListView) rootView.findViewById(R.id.fragment_list);
        listView.setOnItemClickListener(this);
        setupScrollList(listView);
        registerForContextMenu(listView);

        if (objects == null) {
            refresh(false);
        } else {
            listView.setAdapter(adapter = getAdapter(objects));
        }

        return rootView;
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater menuInflater) {
        if (!primaryFragment) {
            return;
        }

        menuInflater.inflate(getOptionsMenu(), menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void refresh(final boolean refresh) {
        int titleRes = getTitleResource();
        if (titleRes != 0) {
            setTitle(getTitleResource());
        }
        listView.setVisibility(View.GONE);

        // Cancel current running task before starting another one
        if (currentTask != null) {
            currentTask.cancel();
        }

        currentTask = new TabBackgroundTask<List<T>>(this) {
            @Override
            protected List<T> doInBackground() throws Throwable {
                MusicService musicService = MusicServiceFactory.getMusicService(context);

                objects = new ArrayList<T>();

                try {
                    objects = getObjects(musicService, refresh, this);
                } catch (Exception x) {
                    Log.e(TAG, "Failed to load", x);
                }

                return objects;
            }

            @Override
            protected void done(List<T> result) {
                if (result != null && !result.isEmpty()) {
                    // Toggle fast scroll to get around issue when length of list changes
                    listView.setFastScrollEnabled(false);
                    listView.setAdapter(adapter = getAdapter(result));
                    listView.setFastScrollEnabled(true);

                    onFinishRefresh();
                    listView.setVisibility(View.VISIBLE);
                } else {
                    setEmpty(true);
                }

                currentTask = null;
            }
        };
        currentTask.execute();
    }

    public abstract int getOptionsMenu();

    public abstract ArrayAdapter getAdapter(List<T> objs);

    public abstract List<T> getObjects(MusicService musicService, boolean refresh, ProgressListener listener)
            throws Exception;

    public abstract int getTitleResource();

    public void onFinishRefresh() {

    }
}