Android Open Source - CampusUB1 Subscribe Dialog

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2013 CampusUB1 Development Team
 *//w  w  w.  ja v  a2  s  .co m
 * 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.dev.campus.util;


import java.util.HashSet;

import com.dev.campus.CampusUB1App;
import com.dev.campus.R;
import com.dev.campus.home.HomeActivity;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;

/**
 * Custom AlertDialog class which handles subscriptions management
 * @author CampusUB1 Development Team
 *
 */
public class SubscribeDialog extends AlertDialog {
  
  private AlertDialog mSubscribeDialog;
  private Activity mContext;
  
  public SubscribeDialog(Activity context) {
    super(context);
    mContext = context;
  }
  
  /**
   * Creates and shows an instance of SubscribeDialog
   * @param redirectionEnabled flag that enables redirecting
   * to home page after validating choices.
   */
  public void showDialog(boolean redirectionEnabled) {
    SubscribeDialogBuilder builder = new SubscribeDialogBuilder(mContext, redirectionEnabled);
    mSubscribeDialog = builder.create();
    mSubscribeDialog.show();
    initializePositiveButton();
  }
  
  /**
   * Check that positive button is enabled only if 
   * at least one establishment is selected
   */
  private void initializePositiveButton() {
    if (!CampusUB1App.persistence.isSubscribedUB1()
     && !CampusUB1App.persistence.isSubscribedLabri())
      mSubscribeDialog.getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(false);
    else
      mSubscribeDialog.getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(true);
  }

  /**
   * Custom AlertDialog builder class which provides subscriptions management
   * @author CampusUB1 Development Team
   *
   */
  private class SubscribeDialogBuilder extends AlertDialog.Builder {
    
    private final Integer UB1_INDEX = 0;
    private final Integer LABRI_INDEX = 1;
    
    private HashSet<Integer> mSelectedItems;
    
    public SubscribeDialogBuilder(Activity context, final boolean redirectionEnabled) {
      super(context);
      
      mSelectedItems = new HashSet<Integer>();
      boolean[] checkedItems = {CampusUB1App.persistence.isSubscribedUB1(), 
                    CampusUB1App.persistence.isSubscribedLabri()};
      if (CampusUB1App.persistence.isSubscribedUB1())
        mSelectedItems.add(UB1_INDEX);
      if (CampusUB1App.persistence.isSubscribedLabri())
        mSelectedItems.add(LABRI_INDEX);

      setCancelable(false);
      setTitle(R.string.select_establishment);
      setMultiChoiceItems(R.array.establishments_array, checkedItems, new DialogInterface.OnMultiChoiceClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which,
            boolean isChecked) {
          if (isChecked) {
            mSelectedItems.add(which);
          } else if (mSelectedItems.contains(which)) {
            mSelectedItems.remove(which);
          }
          
          if (mSelectedItems.size() == 0)
            ((AlertDialog)dialog).getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(false);
          else
            ((AlertDialog)dialog).getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(true);
        }
      });
      
      setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
        
        @Override
        public void onClick(DialogInterface dialog, int which) {
          boolean sub_ub1 = mSelectedItems.contains(UB1_INDEX);
          boolean sub_labri = mSelectedItems.contains(LABRI_INDEX);
          
          CampusUB1App.persistence.setSubscribeUB(sub_ub1);
          CampusUB1App.persistence.setSubscribeLabri(sub_labri);
          
          if (redirectionEnabled) {
            //Manually update filters, as the SharedPreferences
            //listener is not yet registered
            CampusUB1App.persistence.setFilterUB(sub_ub1);
            CampusUB1App.persistence.setFilterLabri(sub_labri);
            mContext.startActivity(new Intent(mContext, HomeActivity.class));
            mContext.finish();
          }
        }
      });
      
      setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
        
        @Override
        public void onClick(DialogInterface dialog, int which) {
          mSelectedItems.clear();
          if (redirectionEnabled)
            mContext.finish();
        }
      });
    }
  }

}

Java Source Code List

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