Android Open Source - spring-a-gram-android Photo Add To Gallery Fragment

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2014 Roy Clarkson//from   w w  w  .j  a  v a 2 s .  co m
 *
 * 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 com.royclarkson.springagram;

import android.app.Activity;
import android.app.Fragment;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.Button;

import com.royclarkson.springagram.model.GalleryResource;
import com.royclarkson.springagram.model.ItemResource;

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.web.client.RestTemplate;

import java.util.List;

/**
 * {@link Fragment} that displays a list of {@link GalleryResource}s to associate with an {@link ItemResource}.
 *
 * @author Roy Clarkson
 */
public class PhotoAddToGalleryFragment extends Fragment implements AbsListView.OnItemClickListener, View.OnClickListener {

  private static final String TAG = PhotoAddToGalleryFragment.class.getSimpleName();

  private static final String ARG_PHOTO_GALLERY_URL = "photo_gallery_url";

  private PhotoAddToGalleryFragmentListener photoAddToGalleryFragmentListener;

  private String itemGalleryUrl;

  private String galleryUrl;

  private List<GalleryResource> galleries;

  private AbsListView listView;


  public PhotoAddToGalleryFragment() {
    // Required empty public constructor
  }

  public static PhotoAddToGalleryFragment newInstance(String itemGalleryUrl) {
    PhotoAddToGalleryFragment fragment = new PhotoAddToGalleryFragment();
    Bundle args = new Bundle();
    args.putString(ARG_PHOTO_GALLERY_URL, itemGalleryUrl);
    fragment.setArguments(args);
    return fragment;
  }


  //***************************************
  // Fragment methods
  //***************************************

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (getArguments() != null) {
      this.itemGalleryUrl = getArguments().getString(ARG_PHOTO_GALLERY_URL);
    }
    this.galleries = this.photoAddToGalleryFragmentListener.getGalleryList();
  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
               Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_photo_add_to_gallery_list, container, false);
    this.listView = (AbsListView) view.findViewById(android.R.id.list);
    this.listView.setOnItemClickListener(this);
    this.listView.setAdapter(new PhotoAddToGalleryListAdapter(getActivity(), this.galleries));
    Button button = (Button) view.findViewById(R.id.button_save);
    button.setOnClickListener(this);
    return view;
  }

  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    setRetainInstance(true);
  }

  @Override
  public void onAttach(Activity activity) {
    super.onAttach(activity);
    try {
      this.photoAddToGalleryFragmentListener = (PhotoAddToGalleryFragmentListener) activity;
    } catch (ClassCastException e) {
      throw new ClassCastException(activity.toString()
          + " must implement PhotoAddToGalleryFragmentListener");
    }
  }

  @Override
  public void onDetach() {
    super.onDetach();
    this.photoAddToGalleryFragmentListener = null;
  }


  //***************************************
  // OnItemClickListener methods
  //***************************************

  @Override
  public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    if (null != this.photoAddToGalleryFragmentListener) {
      GalleryResource selectedGallery = this.photoAddToGalleryFragmentListener.getGalleryByPosition(position);
      this.galleryUrl = selectedGallery.getLink(GalleryResource.REL_SELF).getHref();
    }
  }


  //***************************************
  // onClickListener methods
  //***************************************

  public void onClick(View view) {
    if (view.getId() == R.id.button_save) {
      new AddToGalleryTask().execute(this.itemGalleryUrl, this.galleryUrl);
    }
  }


  //***************************************
  // Listener Interface
  //***************************************

  public interface PhotoAddToGalleryFragmentListener {

    public List<GalleryResource> getGalleryList();

    public GalleryResource getGalleryByPosition(int position);

    public void onPhotoAddToGalleryComplete();

  }


  //***************************************
  // Private classes
  //***************************************

  private class AddToGalleryTask extends AsyncTask<String, Void, Boolean> {

    @Override
    protected void onPreExecute() {

    }

    @Override
    protected Boolean doInBackground(String... params) {
      try {
        final String url = params[0];
        final String postData = params[1];

        HttpHeaders requestHeaders = new HttpHeaders();
        requestHeaders.setContentType(new MediaType("text", "uri-list"));
        HttpEntity<String> requestEntity = new HttpEntity<String>(postData, requestHeaders);
        RestTemplate restTemplate = new RestTemplate();
        restTemplate.exchange(url, HttpMethod.PUT, requestEntity, Void.class);
        return true;
      } catch (Exception e) {
        Log.e(TAG, e.getMessage(), e);
        return false;
      }
    }

    @Override
    protected void onPostExecute(Boolean success) {
      if (photoAddToGalleryFragmentListener != null) {
        photoAddToGalleryFragmentListener.onPhotoAddToGalleryComplete();
      }
    }

  }

}

Java Source Code List

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