Add build android

build_android.md

@@ -0,0 +1,23 @@
+- Download [raymob](https://github.com/Bigfoot71/raymob/releases/tag/5.0)
+- Changes to do:
+```gradle.properties
+
+#gradle.properties
+
+app.orientation=portrait
+
+projectName=treender
+
+# Name of your project
+app.name=treender
+app.native_library_name=treender
+app.application_id=com.petrovv.treender
+```
+
+in cMakeLists.txt
+```Cmake
+set(CMAKE_CXX_STANDARD 20)
+file(GLOB_RECURSE SOURCES "${CMAKE_SOURCE_DIR}/src/*.cpp")
+target_include_directories(${APP_LIB_NAME} PRIVATE "${CMAKE_SOURCE_DIR}/inc")
+
+```