first sample

01_day/jni/Android.mk

@@ -0,0 +1,8 @@
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+LOCAL_CFLAGS    := -fPIE
+LOCAL_LDFLAGS   := -fPIE -pie
+LOCAL_MODULE    := myapp
+LOCAL_SRC_FILES := myapp.c
+include $(BUILD_EXECUTABLE)
+

01_day/jni/myapp.c

@@ -0,0 +1,9 @@
+#include <fcntl.h>
+int main()
+{
+	int fd;
+	fd = open( "/dev/mydev", O_RDONLY );
+	close(fd);
+	return 0;
+}
+