com.sawyer.advadapters.app.adapters.nfjsonadapter.NFJSONAdapterFragment.java Source code

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Here is the source code for com.sawyer.advadapters.app.adapters.nfjsonadapter.NFJSONAdapterFragment.java

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/**
 * Copyright 2014 Jay Soyer
 *
 * 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.sawyer.advadapters.app.adapters.nfjsonadapter;

import android.app.Activity;
import android.app.ListFragment;
import android.os.Bundle;
import android.util.Log;
import android.view.ActionMode;
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.widget.AbsListView;
import android.widget.ListAdapter;
import android.widget.ListView;

import com.sawyer.advadapters.app.R;
import com.sawyer.advadapters.app.ToastHelper;
import com.sawyer.advadapters.app.data.MovieItem;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class NFJSONAdapterFragment extends ListFragment {
    private static final String STATE_CAB_CHECKED_COUNT = "State Cab Checked Count";
    private static final String STATE_LIST = "State List";

    private int mCheckedCount;
    private EventListener mEventListener;

    public static NFJSONAdapterFragment newInstance() {
        return new NFJSONAdapterFragment();
    }

    @Override
    public MovieNFJSONArrayAdapter getListAdapter() {
        return (MovieNFJSONArrayAdapter) super.getListAdapter();
    }

    @Override
    public void setListAdapter(ListAdapter adapter) {
        if (adapter instanceof MovieNFJSONArrayAdapter) {
            super.setListAdapter(adapter);
        } else {
            throw new ClassCastException(
                    "Adapter must be of type " + MovieNFJSONArrayAdapter.class.getSimpleName());
        }
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        getListView().setAdapter(getListAdapter());
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        if (activity instanceof EventListener) {
            mEventListener = (EventListener) activity;
        } else {
            throw new ClassCastException("Activity must implement " + EventListener.class.getSimpleName());
        }
    }

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

        if (savedInstanceState != null) {
            mCheckedCount = savedInstanceState.getInt(STATE_CAB_CHECKED_COUNT);
            try {
                JSONArray list = new JSONArray(savedInstanceState.getString(STATE_LIST));
                setListAdapter(new MovieNFJSONArrayAdapter(getActivity(), list));
            } catch (JSONException e) {
                Log.e(NFJSONAdapterFragment.class.getSimpleName(), "OnRestore Error", e);
                mCheckedCount = 0;
                setListAdapter(new MovieNFJSONArrayAdapter(getActivity()));
            }
        } else {
            setListAdapter(new MovieNFJSONArrayAdapter(getActivity()));
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        ListView lv = (ListView) inflater.inflate(R.layout.listview, container, false);
        lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
        lv.setMultiChoiceModeListener(new OnCabMultiChoiceModeListener());
        return lv;
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        //Granted, making a whole new instance is not even necessary here.
        //However I wanted to demonstrate updating with an entirely different instance.
        JSONObject oldMovie = getListAdapter().optItemJSONObject(position);
        MovieItem newMovie = new MovieItem(oldMovie.optInt(MovieItem.JSON_BARCODE));
        newMovie.title = new StringBuilder(oldMovie.optString(MovieItem.JSON_TITLE, "")).reverse().toString();
        newMovie.year = oldMovie.optInt(MovieItem.JSON_YEAR);
        newMovie.isRecommended = !oldMovie.optBoolean(MovieItem.JSON_IS_RECOMMENDED);
        try {
            getListAdapter().update(position, newMovie.toJSONObject());
        } catch (JSONException e) {
            Log.e("Error updating JSONArray", e.getMessage());
        }
    }

    private void onRemoveItemsClicked() {
        ToastHelper.showRemoveNotSupported(getActivity());
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putString(STATE_LIST, getListAdapter().getJSONArray().toString());
        outState.putInt(STATE_CAB_CHECKED_COUNT, mCheckedCount);
    }

    public interface EventListener {
        public void onAdapterCountUpdated();
    }

    private class OnCabMultiChoiceModeListener implements AbsListView.MultiChoiceModeListener {
        @Override
        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
            boolean result;
            switch (item.getItemId()) {
            case R.id.menu_context_remove:
                onRemoveItemsClicked();
                mode.finish();
                result = true;
                break;

            default:
                result = false;
                break;
            }

            if (result && mEventListener != null) {
                mEventListener.onAdapterCountUpdated();
            }
            return result;
        }

        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
            MenuInflater inflater = mode.getMenuInflater();
            inflater.inflate(R.menu.cab_jsonarray, menu);
            mode.setTitle(mCheckedCount + " Selected");
            return true;
        }

        @Override
        public void onDestroyActionMode(ActionMode mode) {
            mCheckedCount = 0;
        }

        @Override
        public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
            if (checked) {
                ++mCheckedCount;
            } else {
                --mCheckedCount;
            }
            mode.setTitle(mCheckedCount + " Selected");
        }

        @Override
        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            return false;
        }
    }
}