org.fourthline.android.feeds.filechooser.FileListFragment.java Source code

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Here is the source code for org.fourthline.android.feeds.filechooser.FileListFragment.java

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/*
 * Copyright (C) 2012 Paul Burke
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.fourthline.android.feeds.filechooser;

import android.os.Bundle;
import android.os.Environment;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.Loader;
import android.view.View;
import android.widget.ListView;
import org.fourthline.android.feeds.R;

import java.io.File;
import java.util.List;

/**
 * Fragment that displays a list of Files in a given path.
 * 
 * @author paulburke (ipaulpro)
 * @author Christian Bauer
 * 
 */
public class FileListFragment extends ListFragment implements LoaderManager.LoaderCallbacks<List<File>> {

    private static final int LOADER_ID = 0;

    protected FileListAdapter adapter;
    protected String path;

    /**
     * Create a new instance with the given file path.
     * 
     * @param path The absolute path of the file (directory) to display.
     * @return A new Fragment with the given file path. 
     */
    public static FileListFragment newInstance(String path) {
        FileListFragment fragment = new FileListFragment();
        Bundle args = new Bundle();
        args.putString(FileChooserActivity.STATE_PATH, path);
        fragment.setArguments(args);
        return fragment;
    }

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

        adapter = new FileListAdapter(getActivity());
        path = getArguments() != null ? getArguments().getString(FileChooserActivity.STATE_PATH)
                : Environment.getExternalStorageDirectory().getAbsolutePath();
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        setEmptyText(getString(R.string.empty_directory));
        setListAdapter(adapter);
        setListShown(false);
        getLoaderManager().initLoader(LOADER_ID, null, this);
        super.onActivityCreated(savedInstanceState);
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        FileListAdapter adapter = (FileListAdapter) l.getAdapter();
        if (adapter != null) {
            File file = (File) adapter.getItem(position);
            path = file.getAbsolutePath();
            ((FileChooserActivity) getActivity()).onFileSelected(file);
        }
    }

    public Loader<List<File>> onCreateLoader(int id, Bundle args) {
        return new FileLoader(getActivity(), path);
    }

    public void onLoadFinished(Loader<List<File>> loader, List<File> data) {
        adapter.setListItems(data);
        if (isResumed())
            setListShown(true);
        else
            setListShownNoAnimation(true);
    }

    public void onLoaderReset(Loader<List<File>> loader) {
        adapter.clear();
    }
}