Android: GLES20: Called unimplemented OpenGL ES API

Question

I am getting a "Called unimplemented OpenGL ES API" error, when trying the GLES20 Sample, provided by developer.android.com. I modified the sample, though. The reason was because I got an IllegalArgumentException in GLSurfaceView.BaseConfigChooser.chooseconfig, so i replaced mGLSurfaceView.setEGLContextClientVersion( 2 );

The new OnCreateMethod:

protected void onCreate( Bundle savedInstanceState )
{
    super.onCreate( savedInstanceState );
    mGLSurfaceView = new GLSurfaceView( this );

    mGLSurfaceView.setEGLConfigChooser( new EGLConfigChooser()
    {
        @Override
        public EGLConfig chooseConfig( EGL10 egl, EGLDisplay display )
        {
            EGLConfig[] configs = new EGLConfig[1];
            int[] num_config = new int[1];

            boolean check = false;

            int[] configSpec = { EGL10.EGL_DEPTH_SIZE, 16, EGL10.EGL_NONE };

            check = egl.eglInitialize( display, new int[] { 2, 0 } );

            if ( !check )
                return null;
            check = false;

            check = egl.eglChooseConfig( display, configSpec, configs, 1, num_config );
            if ( !check )
                return null;

            return configs[0];
        }
    } );

    mGLSurfaceView.setEGLContextFactory( new EGLContextFactory()
    {
        @Override
        public void destroyContext( EGL10 egl, EGLDisplay display, EGLContext context )
        {
            egl.eglDestroyContext( display, context );
        }

        @Override
        public EGLContext createContext( EGL10 egl, EGLDisplay display, EGLConfig eglConfig )
        {
            int[] attrib_list = new int[]{EGL10.EGL_VERSION, 2, EGL10.EGL_NONE};

            EGLContext context = egl.eglCreateContext( display, eglConfig, EGL10.EGL_NO_CONTEXT, attrib_list  );
            return context;
        }
    });

    mGLSurfaceView.setRenderer( new GLES20TriangleRenderer( this ) );

    setContentView( mGLSurfaceView );
}

The "Called unimplemented OpenGL ES API" error occurs for example at GLES20.glCreateShader; or GLES20.glShaderSource.

I thought, maybe to check the version, so I called gl.glGetString( GLES20.GL_VERSION ); in public void onSurfaceCreated( GL10 gl, EGLConfig config ). glGetString returned "OpenGL ES-CM 1.0". OnSurfaceCreated is called after choosing the config and creating the context, so I really do not understand, why glGetString returns "OpenGL ES-CM 1.0".

I am using Android 2.2 API and tried the sample on a Android 2.2 Virtual device and on a HTC Wildfire, with Android 2.2.1.

I appreciate any help

Answer 1

See this post - triangle opengl in android

As mentioned there, the emulators do not support GL2, but as that post mentions, it worked for me on an actual device.

Answer 2

This is not an error, but a statement. It simply tells you that your target doesn't support OpenGL ES version 2.0.