GL ES 2.0 Failing to create opengl objects

Question

Basically I've just delved into some Android and OpenGL ES 2.0 programming and hit a bit of a problem.

My code compiles fine and it runs but the opengl functions don't seem to be working.

GLES20.createShader(GLES20.GL_VERTEX_SHADER); 
GLES20.glCreateProgram();

all will return 0.

Similarly this:

int posHandle = GLES20.glGetAttribLocation(mShader.getProgramId(), "vPosition");

will return -1 and so on.

How I create my activity:

// Activity

protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

    mSurfaceView = new GLESSurfaceView(this);

    final ActivityManager activityManager = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
    final ConfigurationInfo configInfo = activityManager.getDeviceConfigurationInfo();
    final boolean supports_gles2 = configInfo.reqGlEsVersion >= 0x20000;

    if (supports_gles2)
    {
        mSurfaceView.setEGLContextClientVersion(2);
        mSurfaceView.setRenderer(new GLESRenderer());
    }
    else
    {
        //Log.e("", "Doesn't support GLES 2.0");
    }

    setContentView(mSurfaceView);
}

I've got this in AndroidManifest.xml

<uses-feature android:glEsVersion="0x00020000" android:required="true" />

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="16" />

I think that should be it to allow GLES 2.0 functions to work right? I can give more code if needed but its basically just shader setup, creating vertex buffers and then rendering a basic shape.

Cheers guys

EDIT: I should add that GLES20.glGetError() returns GL_NO_ERROR flag

tempvar tempvar · Accepted Answer · 2013-06-22T07:49:40

Well I found out what I was doing wrong. I was creating my shaders and geometry in constructor for my Renderer class. All I did was move it to the onSurfaceCreated() and it was all good.

GL ES 2.0 Failing to create opengl objects

2 Answers