Modify the android default system language to "medium" and "Time Zone"

The original Android code. The default language of the system is English. Generally, you need to change it to the default Chinese. There are many ways to modify it:

1. Modify the product_locales field,

The language to be selected is placed first, for example, product_locales: = en_us zh_cn. The default language is English. copy it from MK and paste it to device/{hardware platform}/{product }. MK, put zh_cn in the first place. Or directly paste it to build/target/product/CORE. mk. All branches inherit this setting.

2. Modify device/{hardware platform}/{product}/system. Prop or default. Prop and add:

[Persist. SYS. Language]: [zh]

[Persist. SYS. Country]: [CN]

[Persist. SYS. localevar]: []

[Persist. SYS. timezone]: [Asia/Shanghai]

[Ro. Product. locale. Language]: [zh]

[Ro. Product. locale. region]: [CN]

3. Modify init. RC and add:

Setprop persist. SYS. Language ZH

Setprop persist. SYS. Country CN

Setprop persist. SYS. localevar

Setprop persist. SYS. timezone Asia/Shanghai

Setprop Ro. Product. locale. Language ZH

Setprop Ro. Product. locale. region CN

This method has a problem because it is executed every time it is started, so the language is the default language after each boot.

4. Modify device/{hardware platform}/{product}/device. mk and add:

Product_property_overrides + = \

Persist. SYS. Language = ZH \

Persist. SYS. Country = cn \

　　Persist. SYS. localevar = "" \

Persist. SYS. timezone = Asia/Shanghai \

Ro. Product. locale. Language = ZH \

Ro. Product. locale. region = Cn

I use 4th types. Note that the quotation marks above cannot be removed; otherwise, the two lines in build. Prop will become one line:

　　Persist. SYS. localevar =Persist. SYS. timezone = Asia/Shanghai

This will cause the value of persist. SYS. timezone to fail to be obtained. The time zone is still incorrect.

5. Modify build/tools/buildinfo. sh:

Echo "Persist. SYS. Language = ZH"

Echo "Persist. SYS. Country = cn"

Echo "Persist. SYS. localevar ="

Echo "Persist. SYS. timezone = Asia/Shanghai"

Echo "Ro. Product. locale. Language = ZH"

Echo "Ro. Product. locale. region = cn"