PhotoDetailPagerAdapter.java

/*
 * This file provided by Facebook is for non-commercial testing and evaluation
 * purposes only.  Facebook reserves all rights not expressly granted.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.kiminonawa.mydiary.entries.photo;

import android.net.Uri;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.util.SparseArray;
import android.view.ViewGroup;

import java.util.ArrayList;

public class PhotoDetailPagerAdapter extends FragmentPagerAdapter {

    private SparseArray<Fragment> registeredFragments = new SparseArray<Fragment>();
    private ArrayList<Uri> diaryPhotoFileList;

    public PhotoDetailPagerAdapter(FragmentManager fm, ArrayList<Uri> diaryPhotoFileList) {
        super(fm);
        this.diaryPhotoFileList = diaryPhotoFileList;
    }

    @Override
    public PhotoDetailViewerFragment getItem(int position) {
        PhotoDetailViewerFragment fragment =
                PhotoDetailViewerFragment.newInstance(diaryPhotoFileList.get(position));
        return fragment;
    }

    @Override
    public int getCount() {
        return diaryPhotoFileList.size();
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        Fragment fragment = (Fragment) super.instantiateItem(container, position);
        registeredFragments.put(position, fragment);
        return fragment;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        registeredFragments.remove(position);
        super.destroyItem(container, position, object);
    }

    public Fragment getRegisteredFragment(int position) {
        return registeredFragments.get(position);
    }

}