Android system customization
Scope of application
RK3368 Android10
RK3399Pro Android9
RK3399 Android7.1/Android10
RK356X Android11 For other Android versions, it is available for reference.
Explanation of terms
CPU_TYPE：Indicates the main control chip, for examplerk3368，rk3399，rk3399pro, rk356xPRODUCT_TYPE：Indicates the type of product, for example LKD3368
Boot logo animation modification
Phase 1
Methods of code modification
Prepare your logo
Make new logo.bmp
The image properties are the same as the default logo.bmp, otherwise an inversion exception will occur
Both width and height are even numbers
Replace the logo
Replace the
kernel/logo.bmp
Phase 2s
Temporary Modification Method
Prepare bootanimation.zip
Prepare png files
Width and height must be even numbers Prepare desc.txt file, for example:
800 1280 30
p 0 0 part0
* `800 1280 30`meaning:The first two numbers represent the pixel width and height of the image, 30 represents the frame rate, which is the number of images played per second.
* `p 0 0 part0`meaning: p stands for flag, 0 means infinite loop, the second 0 means the interval time between stages is 0, part0 represents the corresponding folder.
* desc.txt text format:Unix+UTF-8
* Make bootanimation.zip
* Compress into a zip file using storage mode
Push bootanimation.zip push bootanimation.zip
adb shell setprop persist.sys.root_access 3
adb root
adb remount
adb push bootanimation.zip system/media/bootanimation.zip
adb shell reboot
Code Modification Method
Prepare bootanimation.zip
Place the prepared bootanimation.zip into the device/rockchip/CPU_TYPE/ directory In the device/rockchip/CPU_TYPE/device.mk file, add the following content:
PRODUCT_COPY_FILES += \
device/rockchip/CPU_TYPE/bootanimation.zip:/system/media/bootanimation.zip
Default Screen Orientation Modification
Temporary Modification Method
System is read-write enabled
adb shell setprop persist.sys.root_access 3
adb root
adb remount
Modify or add property values
Android7.1
In the /system/build.prop file, modify or add the value of ro.sf.hwrotation
0：Landscape
90：Portrait
180：Reverse landscape
270：Reverse portrait
Android10 and above
In the vendor/build.prop file, modify or add the value of ro.surface_flinger.primary_display_orientation
ORIENTATION_0：Landscape
ORIENTATION_90：Portrait
ORIENTATION_180：Reverse landscape
ORIENTATION_270：Reverse portrait
System restart
adb shell reboot
Code Modification Method
Android 7.1:
In the device/rockchip/CPU_TYPE/PRODUCT_TYPE/system.prop file, modify the value of ro.sf.hwrotation Android 10 and above:
In the device/rockchip/CPU_TYPE/BoardConfig.mk file, modify the value of SF_PRIMARY_DISPLAY_ORIENTATION
0：Landscape
90：Portrait
180：Reverse landscape
270：Reverse portrait Delete build.prop in the out directory
rm out/target/product/PRODUCT_TYPE/obj/ETC/system_build_prop_intermediates/build.prop
Default Hide Status Bar
Temporary Modification Method
Execute in adb shell mode
settings put global policy_control immersive.status=*
Code Modification Method
Modify as follows
diff --git a/device/rockchip/common/overlay/frameworks/base/core/res/res/values/config.xml b/device/rockchip/common/overlay/frameworks/base/core/res/res/values/config.xml
index 2092e98d16..59c3ba0321 100644
--- a/device/rockchip/common/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/device/rockchip/common/overlay/frameworks/base/core/res/res/values/config.xml
@@ -30,7 +30,10 @@
<!-- Whether a software navigation bar should be shown. NOTE: in the future this may be
autodetected from the Configuration. -->
<bool name="config_showNavigationBar">true</bool>
+
+ <!-- Height of the status bar -->
+ <dimen name="status_bar_height">0dp</dimen>
<!-- Maximum number of supported users -->
<integer name="config_multiuserMaximumUsers">8</integer>
Built-in APP Methods
Code Modification Method
You can add a new APP folder in the vendor directory
Non-removable
Refer to vendor/rockchip/app
Contents of Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := neardi_sdkapi_demo
LOCAL_MODULE_CLASS := APPS
LOCAL_MODULE_TAGS := optional
LOCAL_BUILT_MODULE_STEM := package.apk
LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)
#LOCAL_PRIVILEGED_MODULE :=
LOCAL_CERTIFICATE := platform
#LOCAL_OVERRIDES_PACKAGES :=
LOCAL_SRC_FILES := $(LOCAL_MODULE).apk
#LOCAL_REQUIRED_MODULES :=
#LOCAL_PREBUILT_JNI_LIBS :=
include $(BUILD_PREBUILT)
* LOCAL_CERTIFICATE := platform meaning: APK is signed with the system signature
* If LOCAL_PRIVILEGED_MODULE is not set or set to false, the installation location is /system/app
#### Removable
* Create a preinstall_del directory under device/rockchip/CPU_TYPE/PRODUCT_TYPE
* Copy the APK to the device/rockchip/CPU_TYPE/PRODUCT_TYPE/preinstall_del directory
* Compile Android
Delete Built-in Application
Temporary Modification Method
adb shell setprop persist.sys.root_access 3
adb root
adb remount
adb shell rm -r system/app/APK_NAME/
adb shell reboot
or
adb shell setprop persist.sys.root_access 3
adb root
adb remount
adb shell rm -r system/priv-app/APK_NAME/
adb shell reboot
Code Modification Method
If the application has source code, comment out include $(BUILD_PACKAGE) in the application’s Android.mk file
If the application is an APK file and has Android.mk, then comment out include $(BUILD_PREBUILT) in the Android.mk file
Boot Start Application
Code Modification Method
Non-Launcher
Add the following content in the AndroidManifest.xml of the application source code
package="com.example.testfile"
android:sharedUserId="android.uid.system">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<receiver android:name="com.example.testfile.BootBroadcastReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</receiver>
Add the broadcast receiver code BootBroadcastReceiver.java, for example
package com.example.testfile;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;
public class BootBroadcastReceiver extends BroadcastReceiver {
private static final String TAG = "sjft";
public static final String EXTRA_VOLUME_STATE = "android.os.storage.extra.VOLUME_STATE";
public static final int STATE_UNMOUNTED = 0;
public static final int STATE_CHECKING = 1;
public static final int STATE_MOUNTED = 2;
public static final int STATE_MOUNTED_READ_ONLY = 3;
public static final int STATE_FORMATTING = 4;
public static final int STATE_EJECTING = 5;
public static final int STATE_UNMOUNTABLE = 6;
public static final int STATE_REMOVED = 7;
public static final int STATE_BAD_REMOVAL = 8;
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String action = intent.getAction();
if (action.equals("android.intent.action.PACKAGE_REPLACED")){
String packageName = intent.getData().getSchemeSpecificPart();
Log.v(TAG,"BootBroadcastReceiver packageName:"+packageName);
if(context.getPackageName().equals(packageName)){
Intent launchIntent = new Intent(context, MainActivity.class);//Restart the application
//If you don't want to hardcode the startup Activity, you can also get the default startup Activity through the following method
//Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage(packageName);
launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(launchIntent);
}
} else if (action.equals("android.intent.action.BOOT_COMPLETED")) {
Intent launchIntent = new Intent(context, MainActivity.class);//Restart the application
//If you don't want to hardcode the startup Activity, you can also get the default startup Activity through the following method
//Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage(packageName);
launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(launchIntent);
}
}
}
An APK that starts automatically upon boot requires a system signature （system signature file）
The APK must be launched at least once before it can receive the broadcast after boot completion.
Launcher
Remove or do not compile the Launcher application in the SDK In the AndroidManifest.xml of the application source code, add the following content to the Activity that starts first:
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
Default Language Modification
The list of supported languages can be viewed in build/target/product/languages_full.mk。
Temporary Modification Method
The system is read-write enabled
adb shell setprop persist.sys.root_access 3
adb root
adb remount
Modify the value of ro.product.locale in the /system/build.prop file (for Android 10 and above: /vendor/build.prop)
en-US：English
zh-CN：Chinese System restart
adb shell reboot
Code Modification Method
Modify the value of PRODUCT_LOCALES in build/target/product/full_base.mk Chinese
PRODUCT_LOCALES := zh_CN
Delete build.prop in the out directory
rm out/target/product/PRODUCT_TYPE/obj/ETC/system_build_prop_intermediates/build.prop
Default Time Zone Modification
The list of supported time zones can be viewed in frameworks/base/packages/SettingsLib/res/xml/timezones.xml。
Temporary Modification Method
The system is read-write enabled
adb shell setprop persist.sys.root_access 3
adb root
adb remount
Modify the value of persist.sys.timezone in the /system/build.prop file (for Android 10 and above: /vendor/build.prop)
Asia/Shanghai：UTC+8 System restart
adb shell reboot
Code Modification Method
Android7.1/Android10
In the device/rockchip/CPU_TYPE/PRODUCT_TYPE/system.prop file, modify the value of persist.sys.timezon
Asia/Shanghai：UTC+8 Android11In the device/rockchip/CPU_TYPE/PRODUCT_TYPE/PRODUCT_TYPE.mk file, add the following content:
PRODUCT_PROPERTY_OVERRIDES += persist.sys.timezone=Asia/Shanghai
Delete build.prop in the out directory
rm out/target/product/PRODUCT_TYPE/obj/ETC/system_build_prop_intermediates/build.prop
Default ROOT
Temporary Modification Method
adb shell setprop persist.sys.root_access 3
Code Modification Method
Android7.1/Android10.0
* In the device/rockchip/CPU_TYPE/PRODUCT_TYPE/system.prop file, add the following content:
persist.sys.root_access=3
Android11 * In the device/rockchip/CPU_TYPE/PRODUCT_TYPE/PRODUCT_TYPE.mk file, add the following content:
PRODUCT_PROPERTY_OVERRIDES += persist.sys.root_access=3
Delete build.prop in the out directory
rm out/target/product/PRODUCT_TYPE/obj/ETC/system_build_prop_intermediates/build.prop
Default System Time 24-Hour Format
Code Modification Method
diff --git a/frameworks/base/packages/SettingsProvider/res/values/defaults.xml b/frameworks/base/packages/SettingsProvider/res/values/defaults.xml
index f95ecc6535..06055dba7b 100644
--- a/frameworks/base/packages/SettingsProvider/res/values/defaults.xml
+++ b/frameworks/base/packages/SettingsProvider/res/values/defaults.xml
@@ -244,4 +244,6 @@
<!-- should show the screenshot button default -->
<integer name="def_screenshot_button_show">0</integer>
+<!-- value 12/24/null corresponds to setting 12/24/auto-->
+ <string name="def_time_12_24" translatable="false">24</string>
</resources>
diff --git a/frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java b/frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
index b3ff9d08a8..ebdd5d3637 100644
--- a/frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
+++ b/frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
@@ -2261,6 +2261,9 @@ class DatabaseHelper extends SQLiteOpenHelper {
private void loadSystemSettings(SQLiteDatabase db) {
......
+
+ loadStringSetting(stmt, Settings.System.TIME_12_24,
+ R.string.def_time_12_24);
Default Never Sleep
Code Modification Method
diff --git a/device/rockchip/common/overlay_screenoff/frameworks/base/packages/SettingsProvider/res/values/defaults.xml b/device/rockchip/common/overlay_screenoff/frameworks/base/packages/SettingsProvider/res/values/defaults.xml
index 77499e6356..2573ace4c5 100644
--- a/device/rockchip/common/overlay_screenoff/frameworks/base/packages/SettingsProvider/res/values/defaults.xml
+++ b/device/rockchip/common/overlay_screenoff/frameworks/base/packages/SettingsProvider/res/values/defaults.xml
@@ -17,7 +17,8 @@
*/
-->
<resources>
- <integer name="def_screen_off_timeout">0x7fffffff</integer>
+ <integer name="def_screen_off_timeout">2147483647</integer>
+ <bool name="def_lockscreen_disabled">true</bool>
Setting Time Invalid
The system time set is earlier than the build time; upon restart, the default is set to the build time.
Code Modification Method
diff --git a/frameworks/base/services/core/java/com/android/server/AlarmManagerService.java b/frameworks/base/services/core/java/com/android/server/AlarmManagerService.java
index 7cdcc01bc0..10f4808ecb 100644
--- a/frameworks/base/services/core/java/com/android/server/AlarmManagerService.java
+++ b/frameworks/base/services/core/java/com/android/server/AlarmManagerService.java
@@ -1510,11 +1510,11 @@ class AlarmManagerService extends SystemService {
final long systemBuildTime = Long.max(
1000L * SystemProperties.getLong("ro.build.date.utc", -1L),
Long.max(Environment.getRootDirectory().lastModified(), Build.TIME));
- if (mInjector.getCurrentTimeMillis() < systemBuildTime) {
+ /*if (mInjector.getCurrentTimeMillis() < systemBuildTime) {
Slog.i(TAG, "Current time only " + mInjector.getCurrentTimeMillis()
+ ", advancing to build time " + systemBuildTime);
mInjector.setKernelTime(systemBuildTime);
- }
+ }*/
// Determine SysUI's uid
mSystemUiUid = mInjector.getSystemUiUid();
Default Open Network ADB
Temporary Modification Method
Method One
adb shell setprop persist.internet_adb_enable 1
Method Two
Open “Developer Options” Enable
ADB over networkSettings–>Developeroptions–>ADB network
Code Modification Method
Android7.1/Android10
* In the device/rockchip/CPU_TYPE/PRODUCT_TYPE/system.prop file, add the following content:
persist.internet.adb.enable=1
Android11 * In the device/rockchip/CPU_TYPE/PRODUCT_TYPE/PRODUCT_TYPE.mk file, add the following content:
PRODUCT_PROPERTY_OVERRIDES += persist.internet.adb.enable=1
Delete build.prop in the out directory
rm out/target/product/PRODUCT_TYPE/obj/ETC/system_build_prop_intermediates/build.prop
Default Setting OTG USB3.0 as Device Mode
Temporary Modification Method
adb shell setprop persist.usb.mode 2
Code Modification Method
Android7.1/Android10
* In the device/rockchip/CPU_TYPE/PRODUCT_TYPE/system.prop file, add the following content:
persist.usb.mode=2
Android11 * In the device/rockchip/CPU_TYPE/PRODUCT_TYPE/PRODUCT_TYPE.mk file, add the following content:
PRODUCT_PROPERTY_OVERRIDES += persist.usb.mode=otg
Delete build.prop in the out directory
rm out/target/product/PRODUCT_TYPE/obj/ETC/system_build_prop_intermediates/build.prop
Enable or Disable Installation of Unknown Apps
Code Modification Method
Android 7.1
In the frameworks/base/packages/SettingsProvider/res/values/defaults.xml file, modify the value of def_install_non_market_apps.
false : Disable
true : Enable
Android 10 and above
In Android 10, the permanent authorization option for “Allow installation from unknown sources” has been removed. This switch is no longer found in the system settings. Google has changed the permanent authorization to individual authorization each time, requiring users to manually confirm software permissions each time they install Android software from third-party sources.
Enable or Disable Touch Sounds
Code Modification Method
Modify the value of def_sound_effects_enabled in the frameworks/base/packages/SettingsProvider/res/values/defaults.xml file.
false : Disable
true : Enable
Configure USB Camera as Front or Rear
By default, it is set to front-facing.(Android7.1 and Android10)
Temporary Modification Method
For front-facing:
adb shell setprop persist.sys.uvc.facing front
For rear-facing:
adb shell setprop persist.sys.uvc.facing back
Code Modification Method
Android7.1/Android10 In the device/rockchip/CPU_TYPE/PRODUCT_TYPE/system.prop file, add the following content:
* For front-facing
persist.sys.uvc.facing=front
* For rear-facing:
persist.sys.uvc.facing=back
Android11 In the device/rockchip/CPU_TYPE/PRODUCT_TYPE/PRODUCT_TYPE.mk file, add the following content:
* For front-facing
PRODUCT_PROPERTY_OVERRIDES += persist.sys.uvc.facing=front
* For rear-facing:
PRODUCT_PROPERTY_OVERRIDES += persist.sys.uvc.facing=back
Delete build.prop in the out directory
rm out/target/product/PRODUCT_TYPE/obj/ETC/system_build_prop_intermediates/build.prop