01-Android_Common_System_Customization

Symbol Explanation

• SDK$: Refers to the source code path.

• console$: Generally refers to the command-line console of the motherboard. Mainboard Command-line Console

• ADB$: Android Debug Bridge command-line tool, generally refers to an environment where ADB can be run.

System Platform

(SDK)$ source build/envsetup.sh
(SDK)$ lunch 
(SDK)$ get_build_var TARGET_BOARD_PLATFORM_PRODUCT
tablet

Select rk3576_u-userdebug in the lunch menu.

Boot Logo

The boot logo is divided into two parts, namely the Uboot stage and the Kernel stage. The Uboot stage parses and displays the image kernel-6.1/logo.bmp. The Kernel stage parses and displays the image kernel-6.1/logo_kernel.bmp.

(SDK)$ ls kernel-6.1/*.bmp
kernel-6.1/logo.bmp  kernel-6.1/logo_kernel.bmp

Boot Animation

(SDK)$ ls device/rockchip/common/bootanimation.zip

Display Orientation Configuration

Default Display Orientation Configuration

Modify the SF_PRIMARY_DISPLAY_ORIENTATION configuration, and set the rotation degree to 0/90/180/270.

(SDK)$ vim device/rockchip/rk3576/BoardConfig.mk
# For Surface Flinger Rotation
SF_PRIMARY_DISPLAY_ORIENTATION ?= 0
SF_PRIMARY_DISPLAY_ORIENTATION ?= 90
SF_PRIMARY_DISPLAY_ORIENTATION ?= 180
SF_PRIMARY_DISPLAY_ORIENTATION ?= 270

ADB Display Orientation Configuration

// 0°
(ADB)$ adb shell settings put system user_rotation 0
// 90°
(ADB)$ adb shell settings put system user_rotation 1
// 180°
(ADB)$ adb shell settings put system user_rotation 2
// 270°
(ADB)$ adb shell settings put system user_rotation 3

Default to Never Sleep

(SDK)$ vim device/rockchip/rk3576/overlay/frameworks/base/packages/SettingsProvider/res/values/defaults.xml
-    <integer name="def_screen_off_timeout">60000</integer>
+    <integer name="def_screen_off_timeout">2147483647</integer>

Default to No Lock Screen

(SDK)$ vim device/rockchip/rk3576/overlay/frameworks/base/packages/SettingsProvider/res/values/defaults.xml
-    <bool name="def_lockscreen_disabled">false</bool>
+    <bool name="def_lockscreen_disabled">true</bool>

$ vim device/rockchip/rk3576/overlay/frameworks/base/core/res/res/values/config.xml
+    <!-- Is the lock-screen disabled for new users by default -->
+    <bool name="config_disableLockscreenByDefault">true</bool>

FAQ

The Problem of Exclamation Mark on the Signal

The native Google system will send a request to the server captive_portal_server to determine whether the network is available. If you don't want this to happen, configure the captive_portal_server and restart the device.

(ADB)$ adb shell settings put global captive_portal_server 204.gentool.top