org.apps8os.logger.android.fragment.LoggerHistoryFragment2.java Source code

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Here is the source code for org.apps8os.logger.android.fragment.LoggerHistoryFragment2.java

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/**
 * Copyright (c) 2013 Aalto University and the authors
 *
 * Permission is hereby granted, free of charge, to any person obtaining 
 * a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation 
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the 
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included 
 * in all copies or substantial portions of the Software.
 *  
 * 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 THE
 * AUTHORS OR COPYRIGHT HOLDERS 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.
 *  
 * Authors:
 * Chao Wei (chao.wei@aalto.fi)
 */
package org.apps8os.logger.android.fragment;

import java.util.Observable;
import java.util.Observer;

import org.apps8os.logger.android.R;
import org.apps8os.logger.android.manager.AppManager;
import org.apps8os.logger.android.storage.AbstractCursorLoader;
import org.apps8os.logger.android.widget.adapter.ActionEventHistoryCursorAdapter;
import org.holoeverywhere.LayoutInflater;
import org.holoeverywhere.app.Activity;

import android.content.Context;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.Loader;
import android.support.v7.app.ActionBar;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;

/**
 * Display the record history in a list view
 * 
 */
public class LoggerHistoryFragment2 extends LoggerBaseFragment implements LoaderManager.LoaderCallbacks<Cursor> {

    private static int LOGGER_HISTORY_LIST_LOADER_ID = 0x59100;

    // The callbacks through which we will interact with the LoaderManager.
    private LoaderManager.LoaderCallbacks<Cursor> mCallbacks = null;
    private ActionEventHistoryCursorAdapter mAdapter = null;
    private ListView mListView = null;

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

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        final ActionBar actionBar = getSupportActivity().getSupportActionBar();
        actionBar.setTitle(R.string.history);
        actionBar.getCustomView().setVisibility(View.GONE);
        actionBar.setDisplayHomeAsUpEnabled(true);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.frag_logger_history, container, false);
        mListView = (ListView) view.findViewById(android.R.id.list);
        mListView.setEmptyView(view.findViewById(R.id.text_veiw_no_history_data));
        mAdapter = new ActionEventHistoryCursorAdapter(getApplicationContext());
        mListView.setAdapter(mAdapter);
        mCallbacks = this;
        return view;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        getLoaderManager().initLoader(LOGGER_HISTORY_LIST_LOADER_ID, null, mCallbacks);
    }

    @Override
    public void onDestroy() {
        if (mAdapter != null) {
            Cursor cursor = mAdapter.getCursor();
            if (cursor != null) {
                cursor.close();
            }
        }
        super.onDestroy();
    }

    @Override
    public void onPrepareOptionsMenu(Menu menu) {
        if (menu != null) {
            menu.clear();
        }
    }

    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        return new ActionEventHistoryLoader(getApplicationContext());
    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
        // A switch-case is useful when dealing with multiple Loaders/IDs
        if (loader.getId() == LOGGER_HISTORY_LIST_LOADER_ID) {
            // The asynchronous load is complete and the data
            // is now available for use. Only now can we associate
            // the queried Cursor with the SimpleCursorAdapter.
            // Log.w(TAG, "loader same: " + loader_id);
            mAdapter.swapCursor(cursor);
        } else {
            // Log.w(TAG, "loader differ: " + loader_id + " / " + loader.getId());
        }
    }

    @Override
    public void onLoaderReset(Loader<Cursor> loader) {
        mAdapter.swapCursor(null);
    }

    static class ActionEventHistoryLoader extends AbstractCursorLoader {

        public ActionEventHistoryLoader(Context context) {
            super(context);
        }

        @Override
        protected Observer newObserver() {
            return new ActionEventObserver();
        }

        @Override
        public Cursor loadInBackground() {
            return AppManager.getActionEventDatabase().getAllActionEventCursor(true);
        }
    }

    static class ActionEventObserver implements Observer {

        @Override
        public void update(Observable observable, Object data) {
        }
    }
}