Drawing Text As Textures On Squares Does Not Show Anything

I'm new to OpenGL and I'm developing an Augmented-reality application for Android. Until now, I was drawing white squares, perpendicular to the camera, pointing the user to the di

Solution 1:

Okay, I had forgotten to enable texture mapping. You can do that within any method that uses the GL10 object. I prefer to do it within the draw method of my objects, so any other object is not affected by the texture. It's as simple as this (just changed 2 lines, the ones that say NEW!!):

public void draw(GL10 gl, int textureId){
    gl.glEnable(GL10.GL_TEXTURE_2D);    //NEW !!! Enable Texture Mapping

    // Bind the previously generated texture
    gl.glBindTexture(GL10.GL_TEXTURE_2D, textureId);

    // Point to our buffers
    gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

    // set the colour for the square
    //gl.glColor4f(0.0f, 0.1f, 0.0f, 0.5f);

    //Set the face rotation
    gl.glFrontFace(GL10.GL_CW);

    //Point to our vertex buffer
    gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer);
    gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, textureBuffer);

    //Draw the vertices as triangle strip
    gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, vertices.length / 3);

    //Disable the client state before leaving
    gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

    gl.glDisable(GL10.GL_TEXTURE_2D);   ////NEW !!! Disable texture mapping
}