Install OpenGL ES and compile code for android

Question

I\'ve just started learning OpenGL ES on android (using this book) and came across an issue of adopting source code from chapter 5 to existing methods of using jni in android (a

Answer 1

I just added

#include <jni.h>

to cube.c & cuberenderer.c

Changed

(*g_VM)->AttachCurrentThread (g_VM, (void **) &env, NULL);

to

(*g_VM)->AttachCurrentThread (g_VM, (const struct JNINativeInterface ***) &env, NULL);

My Android.mk:

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE    := libgltest_jni
LOCAL_CFLAGS    := -Werror
LOCAL_SRC_FILES := cube.c cuberenderer.c
LOCAL_LDLIBS    := -llog
-lGLESv1_CM

include $(BUILD_SHARED_LIBRARY)

My Application.mk:

# The ARMv7 is significanly faster due to the use of the hardware FPU
APP_ABI := armeabi armeabi-v7a
APP_PLATFORM := android-9

And built it on android-ndk-r6

Answer 2

You used the filename GLES/glext.h twice.

Answer 3

Those libraries are provided by Android itself. However, setting up your project to find them and compile your JNI (native) code correctly can be daunting.

I recommend using glbuffer as a starting project, as it will provide you with a GLSurfaceView to draw on and set you up with the proper Android libraries.

The details of linking to the Android libraries are contained in jni/Android.mk inside that project if you'd like to give it a shot yourself from scratch.

Edit - apparently glbuffer is missing jni/Application.mk. Create it and put this inside:

APP_ABI := armeabi armeabi-v7a
APP_PLATFORM := android-8

Then the ndk will know to look inside the android-8 platform for your includes. You can change this to other versions as needed.

Answer 4

I searched the NDK for instances of the "EGL/egl.h" header file. This particular example will compile and run on Android API level 15, but some other API levels don't have the header.