Android預設開啟adb功能並且有root權限

修改檔案1
build/core/main.mk

修改位置1
 enable_target_debugging := true
 tags_to_install :=
 ifneq (,$(user_variant))
   # Target is secure in user builds.
-  ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=1
+  ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=0

   ifeq ($(user_variant),userdebug)
     # Pick up some extra useful tools

修改位置2
 ifeq (true,$(strip $(enable_target_debugging)))
   INCLUDE_TEST_OTA_KEYS := true
 else # !enable_target_debugging
   # Target is less debuggable and adbd is off by default
-  ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=0
+  ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=1
 endif # !enable_target_debugging


修改檔案2
system/core/adb/Android.mk

修改位置
 ifneq (,$(filter userdebug eng,$(TARGET_BUILD_VARIANT)))
 LOCAL_CFLAGS += -DALLOW_ADBD_ROOT=1
 endif
+LOCAL_CFLAGS += -DALLOW_ADBD_ROOT=1