Android-Framework 时间格式默认使用24小时制、时区为上海

frameworks/base/packages/SettingsProvider/res/values/defaults.xml

@@ -259,4 +259,6 @@
     <bool name="def_one_handed_mode_activated">false</bool>
 
+    <string name="time_12_24">24</string>
 </resources>

frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java

@@ -2280,6 +2280,7 @@ class DatabaseHelper extends SQLiteOpenHelper {
 
             loadIntegerSetting(stmt, Settings.System.POINTER_SPEED,
                     R.integer.def_pointer_speed);
+            loadStringSetting(stmt, Settings.System.TIME_12_24, R.string.time_12_24);

device/qcom/qssi/system.prop

persist.sys.timezone=Asia/Shanghai