Android Open Source - opensudoku Folder Detail Loader

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License

The source code is released under:

GNU General Public License

Java Source Code

/* 
 * Copyright (C) 2009 Roman Masek/*from   w  w  w  . j  av  a 2  s.co m*/
 * 
 * This file is part of OpenSudoku.
 * 
 * OpenSudoku is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * OpenSudoku is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with OpenSudoku.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */

package org.moire.opensudoku.gui;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import android.content.Context;
import android.os.Handler;
import android.util.Log;
import org.moire.opensudoku.db.SudokuDatabase;
import org.moire.opensudoku.game.FolderInfo;

/**
 * Loads details of given folders on one single background thread.
 * Results are published on GUI thread via {@link FolderDetailCallback} interface.
 * <p/>
 * Please note that instance of this class has to be created on GUI thread!
 * <p/>
 * You should explicitly call {@link #destroy()} when this object is no longer needed.
 *
 * @author romario
 */
public class FolderDetailLoader {

  private static final String TAG = "FolderDetailLoader";

  private Context mContext;
  private SudokuDatabase mDatabase;
  private Handler mGuiHandler;
  private ExecutorService mLoaderService = Executors.newSingleThreadExecutor();

  public FolderDetailLoader(Context context) {
    mContext = context;
    mDatabase = new SudokuDatabase(mContext);
    mGuiHandler = new Handler();
  }

  public void loadDetailAsync(long folderID, FolderDetailCallback loadedCallback) {
    final long folderIDFinal = folderID;
    final FolderDetailCallback loadedCallbackFinal = loadedCallback;
    mLoaderService.execute(new Runnable() {
      @Override
      public void run() {
        try {
          final FolderInfo folderInfo = mDatabase.getFolderInfoFull(folderIDFinal);

          mGuiHandler.post(new Runnable() {
            @Override
            public void run() {
              loadedCallbackFinal.onLoaded(folderInfo);
            }
          });
        } catch (Exception e) {
          // this is some unimportant background stuff, do not fail
          Log.e(TAG, "Error occured while loading full folder info.", e);
        }
      }
    });
  }

  public void destroy() {
    mLoaderService.shutdownNow();
    mDatabase.close();
  }

  public interface FolderDetailCallback {
    void onLoaded(FolderInfo folderInfo);
  }
}

Java Source Code List

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