• Android System Services
• How to install
  • Android <=6.x.x
  • Android >=7.1.x
  • License
  • Acknowledgments

Android System Services

This repo contains additional android system services to set/read GPIOs und read sensor data. The services where testet on an ODROID XU3-Lite (Android 4.4.x), ODROID C2 (Android 6.x.x) and Raspberry Pi 3 (Android 7.1.x).

How to install

Android <=6.x.x

1. Copy the content of the aidl folder in your android platform folder frameworks/base/core/java/android/os

2. Copy the content of the server folder in your android platform folder frameworks/base/services/java/com/android/server

3. Add the AIDL files to your frameworks/base/Android.mk

LOCAL_SRC_FILES += \
//[..]
core/java/android/os/IUpdateLock.aidl \
//[..]
//[ADD]
core/java/android/os/IValueSupplierManager.aidl \
core/java/android/os/IValueSupplierService.aidl \
core/java/android/os/IGPIOService.aidl \
//[/ADD]
//[...]

4. Add the new services to your frameworks/base/services/java/com/android/server/SystemServer.java

//[..]
//[ADD]
//ValueSupplierManager
import com.android.server.ValueSupplierManager;
//GPIO
import com.android.server.GPIOService;
//[/ADD]
//[..]
class ServerThread {
//[..]
public void initAndLoop() { // On Android 4.4
private void startOtherServices() { // On Android 7.1.x
//[..]
//[ADD]
try {
Slog.i(TAG, "Value Supplie Manager");
ValueSupplierManager valueSupplierManager = new ValueSupplierManager();
ServiceManager.addService(valueSupplierManager.getName(), valueSupplierManager);
}
catch (Throwable e) {
Slog.e(TAG, "Failed to add Value Supplie Manager", e);
}
try {
Slog.i(TAG, "GPIO Service");
GPIOService gpioService = new GPIOService();
ServiceManager.addService(gpioService.getName(), gpioService);
}
catch (Throwable e) {
Slog.e(TAG, "Failed to add GPIO Service", e);
}
//[/ADD]
//[..]

5. in your main android platform folder call make update-api

Android >=7.1.x

1. Create the folder frameworks/base/services/grimgal/java/

2. Copy the content of the server folder to the created folder.

3. Create a Android.mk file in the grimgal folder with the following content

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := services.grimgal
LOCAL_SRC_FILES += \
$(call all-java-files-under,java)
LOCAL_JAVA_LIBRARIES := services.core
include $(BUILD_STATIC_JAVA_LIBRARY)

4. Add the grimgal services to your frameworks/base/services/Android.mk

services := \
//[..]
//[ADD]
grimgal
//[/ADD]

5. Copy the content of the aidl folder in your android platform folder frameworks/base/core/java/android/os

6. Add the aidl files to your frameworks/base/Android.mk

LOCAL_SRC_FILES += \
//[..]
core/java/android/os/IUpdateLock.aidl \
//[..]
//[ADD]
core/java/android/os/IValueSupplierManager.aidl \
core/java/android/os/IValueSupplierService.aidl \
core/java/android/os/IGPIOService.aidl \
//[/ADD]
//[...]

7. Add the new services to your frameworks/base/services/java/com/android/server/SystemServer.java

//[..]//[ADD]//ValueSupplierManagerimportcom.android.server.ValueSupplierManager;
//GPIOimportcom.android.server.GPIOService;
//[/ADD]//[..]classServerThread {
//[..]privatevoidstartOtherServices() {
//[..]//[ADD]try {
Slog.i(TAG, "Value Supplie Manager");
ValueSupplierManagervalueSupplierManager = newValueSupplierManager();
ServiceManager.addService(valueSupplierManager.getName(), valueSupplierManager);
}
catch (Throwablee) {
Slog.e(TAG, "Failed to add Value Supplie Manager", e);
}
try {
Slog.i(TAG, "GPIO Service");
GPIOServicegpioService = newGPIOService();
ServiceManager.addService(gpioService.getName(), gpioService);
}
catch (Throwablee) {
Slog.e(TAG, "Failed to add GPIO Service", e);
}
//[/ADD]
[..]

8. in your main platform folder call make update-api

License

This project is licensed under Apache 2.0 - see the LICENSE file for details.

Acknowledgments

• TU Dortmund Embedded System Software Group which made this release possible