Mild logging cleanup.

Author: DanAlbert

native-activity/app/src/main/cpp/main.cpp

@@ -30,10 +30,13 @@
 #include <initializer_list>
 #include <memory>
 
-#define LOGI(...) \
-  ((void)__android_log_print(ANDROID_LOG_INFO, "native-activity", __VA_ARGS__))
-#define LOGW(...) \
-  ((void)__android_log_print(ANDROID_LOG_WARN, "native-activity", __VA_ARGS__))
+#define LOG_TAG "native-activity"
+
+#define _LOG(priority, fmt, ...) \
+  ((void)__android_log_print((priority), (LOG_TAG), (fmt)__VA_OPT__(, ) __VA_ARGS__))
+
+#define LOGW(fmt, ...) _LOG(ANDROID_LOG_WARN, (fmt)__VA_OPT__(, ) __VA_ARGS__)
+#define LOGI(fmt, ...) _LOG(ANDROID_LOG_INFO, (fmt)__VA_OPT__(, ) __VA_ARGS__)
 
 /**
  * Our saved state data.