[Rom][N0]语言列表预置

涉及到如下文件：

frameworks/base/core/java/com/android/internal/app/LocalePickerWithRegion.java
packages/apps/Settings/src/com/android/settings/localepicker/LocaleListEditor.java
libcore\ojluni\src\main\java\java\util\Locale.java
\packages\apps\Settings\src\com\android\settings\localepicker\LocaleDragAndDropAdapter.java
\frameworks\base\core\java\com\android\internal\app\LocaleStore.java
\frameworks\base\core\java\com\android\internal\app\LocalePicker.java
\packages\apps\Settings\src\com\android\settings\localepicker\LocaleListEditor.java
\frameworks\base\core\res\res\values\locale_config.xml

N0 语言列表分析文档：

MTK 有一篇《Android N Language》的文档，这里因为一些原因不能上传。

1、修改 \packages\apps\Settings\res\values\arrays.xml

<!-- START. Add more languages to Language preferences. By ShawnXiaFei, 20170509. -->
<string-array name="preset_language_tags">
    <item>"hi-IN"</item>    <!-- Hindi (India) -->
    <item>"gu-IN"</item>    <!-- Gujarati (India) -->
    <item>"bn-IN"</item>    <!-- Bengali (India) -->
    <item>"pa-IN"</item>    <!-- Punjabi (Gurmukhi,India) -->
    <item>"ur-IN"</item>    <!-- Urdu (India) -->
    <item>"ar-YE"</item>    <!-- Arabic (Yemen) -->
    <item>"ta-IN"</item>    <!-- Tamil (India) -->
    <item>"te-IN"</item>    <!-- Telugu (India) -->
    <item>"kn-IN"</item>    <!-- Kannada (India) -->
    <item>"ml-IN"</item>    <!-- Malayalam (India) -->
    <item>"ne-IN"</item>    <!-- Nepali (India) -->
    <item>"af-NA"</item>    <!-- Afrikaans (Namibia) -->
    <item>"fo-DK"</item>    <!-- Faroese (Denmark) -->
    <item>"fa-AF"</item>    <!-- Persian (Afghanistan) -->
    <item>"fil-PH"</item>   <!-- Filipino (Philippines) -->
    <item>"si-LK"</item>    <!-- Sinhala (Sri Lanka) -->
</string-array>
<!-- END. Add more languages to Language preferences. By ShawnXiaFei, 20170509. -->

2、修改 \packages\apps\Settings\src\com\android\settings\Settings.java

public class Settings extends SettingsActivity {
    /// START. Add more languages to Language preferences. By ShawnXiaFei, 20170508.
    @Override
    protected void onCreate(Bundle savedState) {
        /// must call super.
        super.onCreate(savedState);
        /// check first start.
        SharedPreferences sp = getPreferences(MODE_PRIVATE);
        boolean isFirstStart = sp.getBoolean("isSettingsFirstStart", true);
        android.util.Log.e("Shawn", "onCreate, isFirstStart = "+isFirstStart);
        if(isFirstStart){
            sp.edit().putBoolean("isSettingsFirstStart", false).apply();
            presetLanguage(getResources().getStringArray(R.array.preset_language_tags););
        }
    }
    /// preset language list.
    private void presetLanguage(String[] languageTags){
        // do not need to preset.
        if (null == languageTags || 0 == languageTags.length) {
            return;
        }
        // alreday exist in list.
        LocaleList localeList = LocalePicker.getLocales();
        List<Locale> newList = new ArrayList<>();
        for(int i = 0 ; i < localeList.size() ; i++){
            Locale locale = localeList.get(i);
            String tag = locale.toLanguageTag();
            if(!newList.contains(locale)){
                newList.add(locale);
            }
            else{
                android.util.Log.e("Shawn", "old exist, tag = "+tag);
            }
        }
        // new list.
        for(String tag : languageTags){
            Locale locale = Locale.forLanguageTag(tag);
            if(!newList.contains(locale)){
                newList.add(locale);
            }
            else{
                android.util.Log.e("Shawn", "new exist, tag = "+tag);
            }
        }
        // reset to preference.
        localeList = new LocaleList(newList.toArray(new Locale[0]));
        LocalePicker.updateLocales(localeList);
    }
    /// END. Add more languages to Language preferences. By ShawnXiaFei, 20170508.
    ......
}