2 * Copyright (C) 2008 ZXing authors
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.google.zxing.client.android;
19 import android.content.SharedPreferences;
20 import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
21 import android.os.Bundle;
22 import android.preference.CheckBoxPreference;
23 import android.preference.PreferenceActivity;
24 import android.preference.PreferenceScreen;
26 import java.util.ArrayList;
27 import java.util.Collection;
30 * The main settings activity.
32 * @author dswitkin@google.com (Daniel Switkin)
34 public final class PreferencesActivity extends PreferenceActivity
35 implements OnSharedPreferenceChangeListener {
37 public static final String KEY_DECODE_1D = "preferences_decode_1D";
38 public static final String KEY_DECODE_QR = "preferences_decode_QR";
39 public static final String KEY_DECODE_DATA_MATRIX = "preferences_decode_Data_Matrix";
40 public static final String KEY_CUSTOM_PRODUCT_SEARCH = "preferences_custom_product_search";
42 public static final String KEY_PLAY_BEEP = "preferences_play_beep";
43 public static final String KEY_VIBRATE = "preferences_vibrate";
44 public static final String KEY_COPY_TO_CLIPBOARD = "preferences_copy_to_clipboard";
45 public static final String KEY_FRONT_LIGHT = "preferences_front_light";
46 public static final String KEY_BULK_MODE = "preferences_bulk_mode";
48 public static final String KEY_HELP_VERSION_SHOWN = "preferences_help_version_shown";
49 public static final String KEY_NOT_OUR_RESULTS_SHOWN = "preferences_not_out_results_shown";
51 private CheckBoxPreference decode1D;
52 private CheckBoxPreference decodeQR;
53 private CheckBoxPreference decodeDataMatrix;
56 protected void onCreate(Bundle icicle) {
57 super.onCreate(icicle);
58 addPreferencesFromResource(R.xml.preferences);
60 PreferenceScreen preferences = getPreferenceScreen();
61 preferences.getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
62 decode1D = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_1D);
63 decodeQR = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_QR);
64 decodeDataMatrix = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_DATA_MATRIX);
65 disableLastCheckedPref();
68 public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
69 disableLastCheckedPref();
72 private void disableLastCheckedPref() {
73 Collection<CheckBoxPreference> checked = new ArrayList<CheckBoxPreference>(3);
74 if (decode1D.isChecked()) {
75 checked.add(decode1D);
77 if (decodeQR.isChecked()) {
78 checked.add(decodeQR);
80 if (decodeDataMatrix.isChecked()) {
81 checked.add(decodeDataMatrix);
83 boolean disable = checked.size() < 2;
84 for (CheckBoxPreference pref : new CheckBoxPreference[] {decode1D, decodeQR, decodeDataMatrix}) {
85 pref.setEnabled(!(disable && checked.contains(pref)));