com.uncc.finalproject.GalleryFragment.java Source code

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Here is the source code for com.uncc.finalproject.GalleryFragment.java

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/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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.uncc.finalproject;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.app.Fragment;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.RadioButton;

import com.parse.FindCallback;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.ParseQuery;

import java.util.ArrayList;
import java.util.List;

/**
 * Demonstrates the use of {@link RecyclerView} with a {@link LinearLayoutManager} and a
 * {@link GridLayoutManager}.
 */
public class GalleryFragment extends Fragment {

    private static final String TAG = "GalleryFragment";
    private static final String KEY_LAYOUT_MANAGER = "layoutManager";
    private static final int SPAN_COUNT = 2;
    private static final int DATASET_COUNT = 60;

    private enum LayoutManagerType {
        LINEAR_LAYOUT_MANAGER
    }

    protected LayoutManagerType mCurrentLayoutManagerType;
    protected RecyclerView mRecyclerView;
    protected CustomAdapter mAdapter;
    protected RecyclerView.LayoutManager mLayoutManager;
    protected ArrayList<ParseObject> mDataset = new ArrayList<>();

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

    @Override
    public void onResume() {
        super.onResume();

        View view = getActivity().getCurrentFocus();
        if (view != null) {
            InputMethodManager imm = (InputMethodManager) getActivity()
                    .getSystemService(getContext().INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
        }

        ParseObject temp = new ParseObject("Albums");
        temp.add("album_name", "No Albums to Display");
        mDataset.add(temp);
        callTitleBarSet("UNCC Gallery");

        ParseQuery<ParseObject> album_query = ParseQuery.getQuery("Albums");
        album_query.whereNotEqualTo("private_setting", true);
        album_query.orderByDescending("createdAt");
        album_query.findInBackground(new FindCallback<ParseObject>() {
            @Override
            public void done(List<ParseObject> objects, ParseException e) {
                if (e == null) {
                    mDataset = new ArrayList<>(objects);
                    mAdapter.updateArrayList(mDataset);
                } else {
                    Log.d("demo", "recycler failed: " + e + "");
                    new ParseErrorHandler(getActivity(), getContext()).handleParseError(e);
                }
            }
        });
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_gallery, container, false);
        rootView.setTag(TAG);

        FloatingActionButton fab = (FloatingActionButton) rootView.findViewById(R.id.fab);
        fab.setImageResource(R.drawable.ic_menu_gallery);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getFragmentManager().beginTransaction()
                        .replace(R.id.sample_content_fragment, new NewPhotoFragment(), "New Photo")
                        .addToBackStack("New Photo").commit();
            }
        });

        mRecyclerView = (RecyclerView) rootView.findViewById(R.id.recyclerView);
        mLayoutManager = new LinearLayoutManager(getActivity());
        mCurrentLayoutManagerType = LayoutManagerType.LINEAR_LAYOUT_MANAGER;

        if (savedInstanceState != null) {
            mCurrentLayoutManagerType = (LayoutManagerType) savedInstanceState.getSerializable(KEY_LAYOUT_MANAGER);
        }

        setRecyclerViewLayoutManager(mCurrentLayoutManagerType);
        mAdapter = new CustomAdapter(mDataset, getActivity(), getContext(), "albums");
        mRecyclerView.setAdapter(mAdapter);
        setRecyclerViewLayoutManager(LayoutManagerType.LINEAR_LAYOUT_MANAGER);

        return rootView;
    }

    public void setRecyclerViewLayoutManager(LayoutManagerType layoutManagerType) {
        int scrollPosition = 0;

        if (mRecyclerView.getLayoutManager() != null) {
            scrollPosition = ((LinearLayoutManager) mRecyclerView.getLayoutManager())
                    .findFirstCompletelyVisibleItemPosition();
        }

        mLayoutManager = new LinearLayoutManager(getActivity());
        mCurrentLayoutManagerType = LayoutManagerType.LINEAR_LAYOUT_MANAGER;
        mRecyclerView.setLayoutManager(mLayoutManager);
        mRecyclerView.scrollToPosition(scrollPosition);
    }

    @Override
    public void onSaveInstanceState(Bundle savedInstanceState) {
        savedInstanceState.putSerializable(KEY_LAYOUT_MANAGER, mCurrentLayoutManagerType);
        super.onSaveInstanceState(savedInstanceState);
    }

    private void callTitleBarSet(String title) {
        if (getContext() == null)
            return;
        if (getContext() instanceof MainActivity) {
            MainActivity mainActivity = (MainActivity) getContext();
            mainActivity.updateActionBarTitle(title);
        }
    }

}