-# Sources
-RES := $(shell find res -type f)
-SRC := $(shell find src -name '*.java')
-
-# Objects
-GEN := gen/$(subst .,/,$(PACKAGE))/R.java
-OBJ := $(subst .java,.class, \
- $(SRC:src/%=obj/%) \
- $(GEN:gen/%=obj/%))
+# Variables
+DIR := $(subst .,/,$(PACKAGE))
+RES := $(wildcard res/*/*.*)
+SRC := $(wildcard src/$(DIR)/*.java)
+GEN := gen/$(DIR)/R.java
+OBJ := obj/$(DIR)/R.class
+APK := java -classpath $(SDKLIB) \
+ com.android.sdklib.build.ApkBuilderMain