Android Open Source - ivotingverification Preferences Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

/**
 * Copyright (C) 2013 Eesti Vabariigi Valimiskomisjon 
 * (Estonian National Electoral Committee), www.vvk.ee
 *//w  ww .  ja  va2s  . c o m
 * Written in 2013 by AS Finestmedia, www.finestmedia.ee
 *
 * Vote-verification application for Estonian Internet voting system
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * This file incorporates work covered by the following copyright and  
 * permission notice:  
 * 
 * Copyright (C) 2008 ZXing authors
 * 
 * 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 ee.vvk.ivotingverification.qr;

import java.util.ArrayList;
import java.util.Collection;

import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceScreen;

/**
 * The main settings activity.
 * 
 * @author dswitkin@google.com (Daniel Switkin)
 */
public final class PreferencesActivity extends PreferenceActivity implements
    OnSharedPreferenceChangeListener {

  public static final String KEY_DECODE_1D = "preferences_decode_1D";
  public static final String KEY_DECODE_QR = "preferences_decode_QR";
  public static final String KEY_DECODE_DATA_MATRIX = "preferences_decode_Data_Matrix";
  public static final String KEY_CUSTOM_PRODUCT_SEARCH = "preferences_custom_product_search";

  public static final String KEY_REVERSE_IMAGE = "preferences_reverse_image";
  public static final String KEY_PLAY_BEEP = "preferences_play_beep";
  public static final String KEY_VIBRATE = "preferences_vibrate";
  public static final String KEY_COPY_TO_CLIPBOARD = "preferences_copy_to_clipboard";
  public static final String KEY_FRONT_LIGHT = "preferences_front_light";
  public static final String KEY_BULK_MODE = "preferences_bulk_mode";
  public static final String KEY_REMEMBER_DUPLICATES = "preferences_remember_duplicates";
  public static final String KEY_SUPPLEMENTAL = "preferences_supplemental";
  public static final String KEY_SEARCH_COUNTRY = "preferences_search_country";

  public static final String KEY_HELP_VERSION_SHOWN = "preferences_help_version_shown";

  private CheckBoxPreference decode1D;
  private CheckBoxPreference decodeQR;
  private CheckBoxPreference decodeDataMatrix;

  @Override
  protected void onCreate(Bundle icicle) {
    super.onCreate(icicle);

    PreferenceScreen preferences = getPreferenceScreen();
    preferences.getSharedPreferences() 
        .registerOnSharedPreferenceChangeListener(this);
    decode1D = (CheckBoxPreference) preferences
        .findPreference(KEY_DECODE_1D);
    decodeQR = (CheckBoxPreference) preferences
        .findPreference(KEY_DECODE_QR);
    decodeDataMatrix = (CheckBoxPreference) preferences
        .findPreference(KEY_DECODE_DATA_MATRIX);
    disableLastCheckedPref();
  }

  @Override
  public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
      String key) {
    disableLastCheckedPref();
  }

  private void disableLastCheckedPref() {
    Collection<CheckBoxPreference> checked = new ArrayList<CheckBoxPreference>(
        3);
    if (decode1D.isChecked()) {
      checked.add(decode1D);
    }
    if (decodeQR.isChecked()) {
      checked.add(decodeQR);
    }
    if (decodeDataMatrix.isChecked()) {
      checked.add(decodeDataMatrix);
    }
    boolean disable = checked.size() < 2;
    CheckBoxPreference[] checkBoxPreferences = { decode1D, decodeQR,
        decodeDataMatrix };
    for (CheckBoxPreference pref : checkBoxPreferences) {
      pref.setEnabled(!(disable && checked.contains(pref)));
    }
  }
}

Java Source Code List

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