Android APK call system hidden api

APK calls hidden api

Example of calling SerialService

1，修改frameworks\base\core\java\android\hardware\SerialManager.java

   Add the following code:

    public static SerialManager getInstance(Context context){

        mSerialManager = (SerialManager)context.getSystemService(Context.SERIAL_SERVICE);

        return mSerialManager;

}

2. Compile the code to generate class.jar

   Command: ./buildall_userdebug.sh B5528BIO

   After successful compilation, it will generate

out\target\common\obj\JAVA_LIBRARIES\framework_intermediates\classes.jar

3. Rename classes.jar to framework.jar and import it into android studio, as shown in the figure:

          

 

4. Add the following code under build.gradle under project

  

 

5. Call the SerialManager.java -->  getInstance () method

 

Calling getSerialPorts() app needs to obtain android.permission.SERIAL_PORT permission

 

If a non-system app obtains this permission, an error will be reported. You need to modify the default configuration of android studio as follows:

 

Then compile and generate apk, build this apk into the system,

1. Create a folder under Packages/apps/, add the android.mk file, and import the apk generated by the studio, as shown in the figure:

      

 

1. anroid.mk modify compilation

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE := MyApplicition

LOCAL_MODULE_TAGS := optional 

LOCAL_SRC_FILES := MyApplicition.apk

LOCAL_MODULE_CLASS := APPS

LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)


LOCAL_PREBUILT_JNI_LIBS := \
	@lib/armeabi-v7a/liben_data_bundle.so \
	@lib/armeabi-v7a/libgnustl_shared.so \
	@lib/armeabi-v7a/libhmm_gesture_hwr_zh.so \
	@lib/armeabi-v7a/libhwrword.so \
	@lib/armeabi-v7a/libpinyin_data_bundle.so


LOCAL_MODULE_PATH := $(TARGET_OUT)/app

LOCAL_CERTIFICATE := platform

LOCAL_DEX_PREOPT := false

LOCAL_PACKAGE_NAME := MyApplicition
LOCAL_PRIVATE_PLATFORM_APIS := true
include $(BUILD_PREBUILT)

 

1. device\mediatek\mt6761\device.mk add macro

PRODUCT_PACKAGES += MyApplicition

 

1. ./buildall_userdebug.sh B5528BIO

Successful compilation will generate apk under system/app