{"id":55442,"date":"2020-01-21T00:00:00","date_gmt":"2020-01-20T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/podgotovka-sdl2-proekta-dlya-zapuska-na-android"},"modified":"2020-02-18T14:03:33","modified_gmt":"2020-02-18T11:03:33","slug":"podgotovka-sdl2-proekta-dlya-zapuska-na-android","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/administrirovanie\/podgotovka-sdl2-proekta-dlya-zapuska-na-android","title":{"rendered":"Forberedelse af SDL2-projekt til k\u00f8rsel p\u00e5 Android","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Hej alle sammen. I dag vil vi se p\u00e5, hvordan man forbereder et projekt ved hj\u00e6lp af SDL2-biblioteket til at k\u00f8re et spil p\u00e5 Android.
\n<\/a><\/noindex>
\nF\u00f8rst skal du downloade Android Studio, installere det og alle n\u00f8dvendige komponenter i denne udviklingsmilj\u00f8. For eksempel har jeg lige nu Kde Neon, og i dette system findes der en fil \/etc\/environment, en lignende fil findes ogs\u00e5 i Ubuntu. Her skal vi definere f\u00f8lgende variabler.<\/p>\n

ANDROID_HOME=\/home\/brugernavn\/Android\/Sdk\nANDROID_NDK_HOME=\/home\/brugernavn\/ndk\n<\/code><\/pre>\n
\nDu skal ogs\u00e5 downloade NDK fra den officielle hjemmeside, pakke den ud i din hjemmemappe og omd\u00f8be den til NDK. Dern\u00e6st skal du downloade SDL2-biblioteket fra hjemmesiden libsdl.org<\/a><\/noindex>. For at bruge SDL2 til Android er det vigtigt ikke at kompilere det til computeren, da det s\u00e5 ikke vil kunne kompileres til Android. For at projektet kan kompilere, skal du oprette et projekt i Android Studio, hvad som helst, for at acceptere licensen; ellers vil SDL2 bede om licens ved bygning.<\/p>\n
For at l\u00e6se filer i Android fra assets skal du bruge SDL_RWops-funktionerne. Her er et eksempel p\u00e5 brugen i koden til at arbejde med skrifttyper. I dette tilf\u00e6lde kan vi ikke bruge FT_New_Face, men skal i stedet bruge FT_New_Memory_Face for at bruge de allerede l\u00e6ste data.<\/p>\n
#ifdef __ANDROID__\n        snprintf ( path, 254, "fonts\/%s", file );\n        SDL_RWops *rw = SDL_RWFromFile(path, "r" );\n        char *memory = ( char * ) calloc ( rw->hidden.androidio.size, 1 );\n        SDL_RWread(rw, memory, 1, rw->hidden.androidio.size );\n\n        FT_New_Memory_Face(*this->ft_library, ( const FT_Byte  * )memory, rw->hidden.androidio.size, 0, &this;->face );\n        SDL_RWclose(rw);\n        free ( memory );\n#else\n        snprintf ( path, 254, "%s\/fonts\/%s", DEFAULT_ASSETS, file );\n        if ( access ( path, F_OK ) ) {\n                fprintf ( stderr, "not found font: %sn", path );\n                exit ( EXIT_FAILURE );\n        }\n        struct stat st;\n        stat ( path, &st; );\n        FILE *rw = fopen ( path, "r" );\n        char *memory = ( char * ) calloc ( st.st_size, 1 );\n        fread ( memory, 1, st.st_size, rw );\n\n        FT_New_Memory_Face ( *this->ft_library, ( const FT_Byte * ) memory, st.st_size, 0, &this;->face );\n        fclose ( rw );\n        free ( memory );\n#endif\n\n<\/code><\/pre>\n
\nJeg har ogs\u00e5 oprettet en headerfil til at inkludere SDL2-overskrifter. NO_SDL_GLEXT er n\u00f8dvendigt for, at kompileringen kan gennemf\u00f8res korrekt for Android.<\/p>\n
#ifdef __ANDROID__\n#include "SDL.h"\n#include "SDL_video.h"\n#include "SDL_events.h"\n#define NO_SDL_GLEXT \n#include "SDL_opengl.h"\n#include "SDL_opengles2.h"\n#else\n#include <SDL2\/SDL.h>\n#include <SDL2\/SDL_video.h>\n#include <SDL2\/SDL_opengl.h>\n#include <SDL2\/SDL_opengles2.h>\n#endif\n<\/code><\/pre>\n
\nS\u00e5 projektet er klart, shaderne er klar til OpenGL ES 3.0. Nu skal vi oprette android-project. For dette skal vi udpakke SDL2-arkivet. G\u00e5 til build-scripts. Og k\u00f8r f\u00f8lgende.<\/p>\n
.\/androidbuild.sh com.xverizex.test main.cpp\n<\/code><\/pre>\n
\nDer vil komme en s\u00e5dan besked.<\/p>\n
For at bygge og installere p\u00e5 en enhed til test skal du k\u00f8re f\u00f8lgende:\ncd \/home\/cf\/programs\/SDL2-2.0.10\/build\/com.xverizex.test\n.\/gradlew installDebug\n<\/code><\/pre>\n
\nG\u00e5 til com.xverizex.test. G\u00e5 ind i com.xverizex.test\/app\/jni\/src. Kopier dit spilprojekt. Og \u00e6ndr Android.mk-filen, som i mit tilf\u00e6lde ser s\u00e5dan ud.<\/p>\n
LOCAL_PATH := $(call my-dir)\n\ninclude $(CLEAR_VARS)\n\nLOCAL_MODULE := main\n\nSDL_PATH := ..\/SDL\nFREETYPE_PATH := ..\/Freetype2\n\nLOCAL_C_INCLUDES := $(LOCAL_PATH)\/$(SDL_PATH)\/include $(LOCAL_PATH)\/$(FREETYPE_PATH)\/include\n\n# Tilf\u00f8j dine applikationskildefiler her...\nLOCAL_SRC_FILES := .\/engine\/lang.cpp .\/engine\/actor.cpp .\/engine\/sprite.cpp .\/engine\/shaders.cpp .\/engine\/box.cpp .\/engine\/menubox.cpp .\/engine\/load_manager.cpp .\/engine\/main.cpp .\/engine\/font.cpp .\/engine\/model.cpp .\/engine\/button.cpp .\/theme.cpp .\/level_manager.cpp .\/menu\/menu.cpp\n\nLOCAL_SHARED_LIBRARIES := SDL2 Freetype2\n\nLOCAL_LDLIBS := -lGLESv1_CM -lGLESv2 -llog \n\ninclude $(BUILD_SHARED_LIBRARY)\n<\/code><\/pre>\n
\nSom du m\u00e5ske allerede har bem\u00e6rket, tilf\u00f8jer jeg endnu et bibliotek, Freetype2. Jeg fandt en klar version p\u00e5 GitHub til Android, men den virkede ikke, der skulle laves nogle \u00e6ndringer. Vi opretter ogs\u00e5 kataloget app\/src\/main\/assets. Her placerer vi vores ressourcer (fonts, sprites, 3D-modeller).<\/p>\n
Lad os nu konfigurere Freetype2 til Android. Download fra min GitHub. Forbindelse<\/a><\/noindex>, og kopier kataloget Freetype2 til kataloget app\/jni\/. Alt er klar. Nu k\u00f8rer vi kommandoen .\/gradlew installDebug i com.xverizex.test. For at kunne tilf\u00f8je dette spil til Android, skal debugging v\u00e6re sl\u00e5et til p\u00e5 Android. For at g\u00f8re dette, g\u00e5 til indstillinger, g\u00e5 til 'System', g\u00e5 til 'Om tabletten' og tryk cirka seks gange p\u00e5 'Byggnummer'-muligheden. G\u00e5 derefter tilbage, og der vises en mulighed for udviklere. G\u00e5 ind og t\u00e6nd for den, og aktiver ogs\u00e5 'USB-debugging'-optionen. Nu skal vi have en n\u00f8gle til tabletten. For at g\u00f8re dette skal vi installere adb-programmet. K\u00f8r adb shell i konsollen, og tabletten viser en n\u00f8gle, som skal accepteres. Det er det, nu kan spillene downloades til tabletten.
\n
Kilde: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"
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