jp.co.rediscovery.firstflight.PhotoFragment.java Source code

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Here is the source code for jp.co.rediscovery.firstflight.PhotoFragment.java

Source

package jp.co.rediscovery.firstflight;
/*
 * By downloading, copying, installing or using the software you agree to this license.
 * If you do not agree to this license, do not download, install,
 * copy or use the software.
 *
 *
 *                           License Agreement
 *                        (3-clause BSD License)
 *
 * Copyright (C) 2015-2018, saki t_saki@serenegiant.com
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *
 *   * Neither the names of the copyright holders nor the names of the contributors
 *     may be used to endorse or promote products derived from this software
 *     without specific prior written permission.
 *
 * This software is provided by the copyright holders and contributors "as is" and
 * any express or implied warranties, including, but not limited to, the implied
 * warranties of merchantability and fitness for a particular purpose are disclaimed.
 * In no event shall copyright holders or contributors be liable for any direct,
 * indirect, incidental, special, exemplary, or consequential damages
 * (including, but not limited to, procurement of substitute goods or services;
 * loss of use, data, or profits; or business interruption) however caused
 * and on any theory of liability, whether in contract, strict liability,
 * or tort (including negligence or otherwise) arising in any way out of
 * the use of this software, even if advised of the possibility of such damage.
 */

import android.database.DataSetObserver;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.serenegiant.media.MediaStoreImageAdapter;

/** ??????Fragment */
public class PhotoFragment extends BaseFragment {
    private static final boolean DEBUG = false; // FIXME ??false????
    private static final String TAG = PhotoFragment.class.getSimpleName();

    private static final String KEY_FILE_ID = "PhotoFragment_KEY_FILE_ID";

    private ViewPager mViewPager;
    private MediaStoreImageAdapter mAdapter;
    private long mId;

    public static PhotoFragment newInstance(final long id) {
        PhotoFragment fragment = new PhotoFragment();
        final Bundle args = new Bundle();
        args.putLong(KEY_FILE_ID, id);
        fragment.setArguments(args);
        return fragment;
    }

    public PhotoFragment() {
        super();
        // ??
    }

    @Override
    public View onCreateView(final LayoutInflater inflater, final ViewGroup container,
            final Bundle savedInstanceState) {
        loadArguments(savedInstanceState);

        final View rootView = inflater.inflate(R.layout.fragment_photo, container, false);
        initView(rootView);
        return rootView;
    }

    @Override
    protected void loadArguments(final Bundle savedInstanceState) {
        Bundle args = savedInstanceState;
        if (args == null) {
            args = getArguments();
        }
        mId = args.getLong(KEY_FILE_ID);
    }

    private void initView(final View rootView) {
        mViewPager = rootView.findViewById(R.id.viewpager);
        mViewPager.setKeepScreenOn(true);
        mAdapter = new MediaStoreImageAdapter(getActivity(), R.layout.grid_item_media, false);
        // MediaStoreImageAdapter?Cursor???????
        // ???0?????ViewPager#setAdapter?
        mAdapter.registerDataSetObserver(new DataSetObserver() {
            @Override
            public void onChanged() {
                super.onChanged();
                mViewPager.setAdapter(mAdapter);
                mViewPager.setCurrentItem(mAdapter.getItemPositionFromID(mId));
                mAdapter.unregisterDataSetObserver(this); // ????OK????
            }

            @Override
            public void onInvalidated() {
                super.onInvalidated();
            }
        });
        mAdapter.startQuery(); // ??
    }
}