com.royclarkson.springagram.GalleryAddFragment.java Source code

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Here is the source code for com.royclarkson.springagram.GalleryAddFragment.java

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/*
 * Copyright 2014 Roy Clarkson
 *
 * 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.Button;
import android.widget.EditText;

import com.royclarkson.springagram.model.Gallery;

import org.springframework.web.client.RestTemplate;

/**
 * {@link Fragment} that displays a form to add a new {@link Gallery}
 *
 * @author Roy Clarkson
 */
public class GalleryAddFragment extends Fragment implements View.OnClickListener {

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

    private static final String ARG_GALLERIES_LIST_URL = "galleries_url";

    private String galleriesUrl;

    private GalleryAddFragmentListener galleryAddFragmentListener;

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

    public static GalleryAddFragment newInstance(String galleriesUrl) {
        GalleryAddFragment fragment = new GalleryAddFragment();
        Bundle args = new Bundle();
        args.putString(ARG_GALLERIES_LIST_URL, galleriesUrl);
        fragment.setArguments(args);
        return fragment;
    }

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

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            this.galleriesUrl = getArguments().getString(ARG_GALLERIES_LIST_URL);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_gallery_add, container, false);
        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 {
            galleryAddFragmentListener = (GalleryAddFragmentListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString() + " must implement GalleryAddFragmentListener");
        }
    }

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

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

    public void onClick(View view) {
        if (view.getId() == R.id.button_save) {
            new AddGalleryTask().execute(this.galleriesUrl);
        }
    }

    private String getGalleryDescription() {
        EditText descriptionText = (EditText) this.getActivity().findViewById(R.id.text_description);
        return descriptionText.getText().toString();
    }

    //***************************************
    // Listener interface
    //***************************************

    public interface GalleryAddFragmentListener {

        public void onGalleryAddComplete();

    }

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

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

        private Gallery gallery;

        @Override
        protected void onPreExecute() {
            this.gallery = new Gallery(getGalleryDescription());
        }

        @Override
        protected Boolean doInBackground(String... params) {
            try {
                final String url = params[0];
                RestTemplate restTemplate = new RestTemplate();
                restTemplate.postForLocation(url, this.gallery);
                return true;
            } catch (Exception e) {
                Log.e(TAG, e.getMessage(), e);
                return false;
            }
        }

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

    }

}