LocalePicker.java revision 39f96f95c3ee5e6c2f2e96f2bdf4ba29d18840fe 
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.internal.app;
18
19import com.android.internal.R;
20
21import android.app.ActivityManagerNative;
22import android.app.IActivityManager;
23import android.app.ListFragment;
24import android.app.backup.BackupManager;
25import android.content.Context;
26import android.content.res.Configuration;
27import android.content.res.Resources;
28import android.os.Bundle;
29import android.os.RemoteException;
30import android.util.Log;
31import android.view.LayoutInflater;
32import android.view.View;
33import android.view.ViewGroup;
34import android.widget.ArrayAdapter;
35import android.widget.ListView;
36import android.widget.TextView;
37
38import java.text.Collator;
39import java.util.Arrays;
40import java.util.Locale;
41import java.util.ArrayList;
42
43public class LocalePicker extends ListFragment {
44    private static final String TAG = "LocalePicker";
45    private static final boolean DEBUG = false;
46
47    public static interface LocaleSelectionListener {
48        // You can add any argument if you really need it...
49        public void onLocaleSelected(Locale locale);
50    }
51
52    protected boolean isInDeveloperMode() {
53        return false;
54    }
55
56    LocaleSelectionListener mListener;  // default to null
57
58    public static class LocaleInfo implements Comparable<LocaleInfo> {
59        static final Collator sCollator = Collator.getInstance();
60
61        String label;
62        Locale locale;
63
64        public LocaleInfo(String label, Locale locale) {
65            this.label = label;
66            this.locale = locale;
67        }
68
69        public String getLabel() {
70            return label;
71        }
72
73        public Locale getLocale() {
74            return locale;
75        }
76
77        @Override
78        public String toString() {
79            return this.label;
80        }
81
82        @Override
83        public int compareTo(LocaleInfo another) {
84            return sCollator.compare(this.label, another.label);
85        }
86    }
87
88    /**
89     * Constructs an Adapter object containing Locale information. Content is sorted by
90     * {@link LocaleInfo#label}.
91     */
92    public static ArrayAdapter<LocaleInfo> constructAdapter(Context context) {
93        return constructAdapter(context, false /* disable pesudolocales */);
94    }
95
96    public static ArrayAdapter<LocaleInfo> constructAdapter(Context context,
97                                                            final boolean isInDeveloperMode) {
98        return constructAdapter(context, R.layout.locale_picker_item, R.id.locale,
99                isInDeveloperMode);
100    }
101
102    public static ArrayAdapter<LocaleInfo> constructAdapter(Context context,
103            final int layoutId, final int fieldId) {
104        return constructAdapter(context, layoutId, fieldId, false /* disable pseudolocales */);
105    }
106
107    public static ArrayAdapter<LocaleInfo> constructAdapter(Context context,
108            final int layoutId, final int fieldId, final boolean isInDeveloperMode) {
109        final Resources resources = context.getResources();
110
111        ArrayList<String> localeList = new ArrayList<String>(Arrays.asList(
112                Resources.getSystem().getAssets().getLocales()));
113        if (isInDeveloperMode) {
114            if (!localeList.contains("zz_ZZ")) {
115                localeList.add("zz_ZZ");
116            }
117        /** - TODO: Enable when zz_ZY Pseudolocale is complete
118         *  if (!localeList.contains("zz_ZY")) {
119         *      localeList.add("zz_ZY");
120         *	}
121         */
122        }
123        String[] locales = new String[localeList.size()];
124        locales = localeList.toArray(locales);
125
126        final String[] specialLocaleCodes = resources.getStringArray(R.array.special_locale_codes);
127        final String[] specialLocaleNames = resources.getStringArray(R.array.special_locale_names);
128        Arrays.sort(locales);
129        final int origSize = locales.length;
130        final LocaleInfo[] preprocess = new LocaleInfo[origSize];
131        int finalSize = 0;
132        for (int i = 0 ; i < origSize; i++ ) {
133            final String s = locales[i];
134            final int len = s.length();
135            if (len == 5) {
136                String language = s.substring(0, 2);
137                String country = s.substring(3, 5);
138                final Locale l = new Locale(language, country);
139
140                if (finalSize == 0) {
141                    if (DEBUG) {
142                        Log.v(TAG, "adding initial "+ toTitleCase(l.getDisplayLanguage(l)));
143                    }
144                    preprocess[finalSize++] =
145                            new LocaleInfo(toTitleCase(l.getDisplayLanguage(l)), l);
146                } else {
147                    // check previous entry:
148                    //  same lang and a country -> upgrade to full name and
149                    //    insert ours with full name
150                    //  diff lang -> insert ours with lang-only name
151                    if (preprocess[finalSize-1].locale.getLanguage().equals(
152                            language) &&
153                            !preprocess[finalSize-1].locale.getLanguage().equals("zz")) {
154                        if (DEBUG) {
155                            Log.v(TAG, "backing up and fixing "+
156                                    preprocess[finalSize-1].label+" to "+
157                                    getDisplayName(preprocess[finalSize-1].locale,
158                                            specialLocaleCodes, specialLocaleNames));
159                        }
160                        preprocess[finalSize-1].label = toTitleCase(
161                                getDisplayName(preprocess[finalSize-1].locale,
162                                        specialLocaleCodes, specialLocaleNames));
163                        if (DEBUG) {
164                            Log.v(TAG, "  and adding "+ toTitleCase(
165                                    getDisplayName(l, specialLocaleCodes, specialLocaleNames)));
166                        }
167                        preprocess[finalSize++] =
168                                new LocaleInfo(toTitleCase(
169                                        getDisplayName(
170                                                l, specialLocaleCodes, specialLocaleNames)), l);
171                    } else {
172                        String displayName;
173                        if (s.equals("zz_ZZ")) {
174                            displayName = "[Developer] Accented English";
175                        } else if (s.equals("zz_ZY")) {
176                            displayName = "[Developer] Fake Bi-Directional";
177                        } else {
178                            displayName = toTitleCase(l.getDisplayLanguage(l));
179                        }
180                        if (DEBUG) {
181                            Log.v(TAG, "adding "+displayName);
182                        }
183                        preprocess[finalSize++] = new LocaleInfo(displayName, l);
184                    }
185                }
186            }
187        }
188
189        final LocaleInfo[] localeInfos = new LocaleInfo[finalSize];
190        for (int i = 0; i < finalSize; i++) {
191            localeInfos[i] = preprocess[i];
192        }
193        Arrays.sort(localeInfos);
194
195        final LayoutInflater inflater =
196                (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
197        return new ArrayAdapter<LocaleInfo>(context, layoutId, fieldId, localeInfos) {
198            @Override
199            public View getView(int position, View convertView, ViewGroup parent) {
200                View view;
201                TextView text;
202                if (convertView == null) {
203                    view = inflater.inflate(layoutId, parent, false);
204                    text = (TextView) view.findViewById(fieldId);
205                    view.setTag(text);
206                } else {
207                    view = convertView;
208                    text = (TextView) view.getTag();
209                }
210                LocaleInfo item = getItem(position);
211                text.setText(item.toString());
212                text.setTextLocale(item.getLocale());
213
214                return view;
215            }
216        };
217    }
218
219    private static String toTitleCase(String s) {
220        if (s.length() == 0) {
221            return s;
222        }
223
224        return Character.toUpperCase(s.charAt(0)) + s.substring(1);
225    }
226
227    private static String getDisplayName(
228            Locale l, String[] specialLocaleCodes, String[] specialLocaleNames) {
229        String code = l.toString();
230
231        for (int i = 0; i < specialLocaleCodes.length; i++) {
232            if (specialLocaleCodes[i].equals(code)) {
233                return specialLocaleNames[i];
234            }
235        }
236
237        return l.getDisplayName(l);
238    }
239
240    @Override
241    public void onActivityCreated(final Bundle savedInstanceState) {
242        super.onActivityCreated(savedInstanceState);
243        final ArrayAdapter<LocaleInfo> adapter = constructAdapter(getActivity(),
244                isInDeveloperMode());
245        setListAdapter(adapter);
246    }
247
248    public void setLocaleSelectionListener(LocaleSelectionListener listener) {
249        mListener = listener;
250    }
251
252    @Override
253    public void onResume() {
254        super.onResume();
255        getListView().requestFocus();
256    }
257
258    /**
259     * Each listener needs to call {@link #updateLocale(Locale)} to actually change the locale.
260     *
261     * We don't call {@link #updateLocale(Locale)} automatically, as it halt the system for
262     * a moment and some callers won't want it.
263     */
264    @Override
265    public void onListItemClick(ListView l, View v, int position, long id) {
266        if (mListener != null) {
267            final Locale locale = ((LocaleInfo)getListAdapter().getItem(position)).locale;
268            mListener.onLocaleSelected(locale);
269        }
270    }
271
272    /**
273     * Requests the system to update the system locale. Note that the system looks halted
274     * for a while during the Locale migration, so the caller need to take care of it.
275     */
276    public static void updateLocale(Locale locale) {
277        try {
278            IActivityManager am = ActivityManagerNative.getDefault();
279            Configuration config = am.getConfiguration();
280
281            // Will set userSetLocale to indicate this isn't some passing default - the user
282            // wants this remembered
283            config.setLocale(locale);
284
285            am.updateConfiguration(config);
286            // Trigger the dirty bit for the Settings Provider.
287            BackupManager.dataChanged("com.android.providers.settings");
288        } catch (RemoteException e) {
289            // Intentionally left blank
290        }
291    }
292}
293