GeneralPreferences.java revision bfbf0dd853182bd5d644a88363414a4287616781 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
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
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
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.
15 */
16
17package com.android.email.activity.setup;
18
19import android.os.Bundle;
20import android.preference.ListPreference;
21import android.preference.Preference;
22import android.preference.PreferenceCategory;
23import android.preference.Preference.OnPreferenceChangeListener;
24import android.preference.PreferenceFragment;
25import android.preference.PreferenceScreen;
26import android.widget.Toast;
27
28import com.android.email.Preferences;
29import com.android.email.R;
30import com.android.email.activity.UiUtilities;
31
32public class GeneralPreferences extends PreferenceFragment implements OnPreferenceChangeListener  {
33
34    private static final String PREFERENCE_CATEGORY_KEY = "category_general_preferences";
35
36    private static final String PREFERENCE_KEY_AUTO_ADVANCE = "auto_advance";
37    private static final String PREFERENCE_KEY_TEXT_ZOOM = "text_zoom";
38    private static final String PREFERENCE_KEY_REPLY_ALL = Preferences.REPLY_ALL;
39    private static final String PREFERENCE_KEY_CLEAR_TRUSTED_SENDERS = "clear_trusted_senders";
40
41    private Preferences mPreferences;
42    private ListPreference mAutoAdvance;
43    private ListPreference mTextZoom;
44
45    CharSequence[] mSizeSummaries;
46
47    @Override
48    public void onCreate(Bundle savedInstanceState) {
49        super.onCreate(savedInstanceState);
50
51        getPreferenceManager().setSharedPreferencesName(Preferences.PREFERENCES_FILE);
52
53        // Load the preferences from an XML resource
54        addPreferencesFromResource(R.xml.general_preferences);
55
56        if (UiUtilities.useTwoPane(getActivity())) {
57            // "Reply All" should only be shown on phones
58            PreferenceCategory pc = (PreferenceCategory) findPreference(PREFERENCE_CATEGORY_KEY);
59            pc.removePreference(findPreference(PREFERENCE_KEY_REPLY_ALL));
60        }
61    }
62
63    @Override
64    public void onResume() {
65        loadSettings();
66        super.onResume();
67    }
68
69    @Override
70    public boolean onPreferenceChange(Preference preference, Object newValue) {
71        String key = preference.getKey();
72
73        if (PREFERENCE_KEY_AUTO_ADVANCE.equals(key)) {
74            mPreferences.setAutoAdvanceDirection(mAutoAdvance.findIndexOfValue((String) newValue));
75            return true;
76        } else if (PREFERENCE_KEY_TEXT_ZOOM.equals(key)) {
77            mPreferences.setTextZoom(mTextZoom.findIndexOfValue((String) newValue));
78            reloadDynamicSummaries();
79            return true;
80        }
81        return false;
82    }
83
84    @Override
85    public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
86        if (getActivity() == null) {
87            // Guard against monkeys.
88            return false;
89        }
90
91        String key = preference.getKey();
92        if (key.equals(PREFERENCE_KEY_CLEAR_TRUSTED_SENDERS)) {
93            mPreferences.clearTrustedSenders();
94            Toast.makeText(
95                    getActivity(), R.string.trusted_senders_cleared, Toast.LENGTH_SHORT).show();
96            return true;
97        }
98
99        return false;
100    }
101
102    private void loadSettings() {
103        mPreferences = Preferences.getPreferences(getActivity());
104        mAutoAdvance = (ListPreference) findPreference(PREFERENCE_KEY_AUTO_ADVANCE);
105        mAutoAdvance.setValueIndex(mPreferences.getAutoAdvanceDirection());
106        mAutoAdvance.setOnPreferenceChangeListener(this);
107
108        mTextZoom = (ListPreference) findPreference(PREFERENCE_KEY_TEXT_ZOOM);
109        mTextZoom.setValueIndex(mPreferences.getTextZoom());
110        mTextZoom.setOnPreferenceChangeListener(this);
111
112        reloadDynamicSummaries();
113    }
114
115    /**
116     * Reload any preference summaries that are updated dynamically
117     */
118    private void reloadDynamicSummaries() {
119        int textZoomIndex = mPreferences.getTextZoom();
120        // Update summary - but only load the array once
121        if (mSizeSummaries == null) {
122            mSizeSummaries = getActivity().getResources()
123                    .getTextArray(R.array.general_preference_text_zoom_summary_array);
124        }
125        CharSequence summary = null;
126        if (textZoomIndex >= 0 && textZoomIndex < mSizeSummaries.length) {
127            summary = mSizeSummaries[textZoomIndex];
128        }
129        mTextZoom.setSummary(summary);
130    }
131}
132