Why does glColorPointer not color the triangle - and other weird things with opengl es

I am not very familiar with OpenGL but I tried to draw a simple triangle on the screen. Each corner colored in a different color. Something like a basic tutorial... The problem is, that

1. the triangle just is white.
2. the triangle is only visible in emulator not on my HTC Desire.

My GLView class:

public class GLView extends GLSurfaceView implements GLSurfaceView.Renderer {

private FloatBuffer vertexBuff;
private FloatBuffer colorBuff;

public static FloatBuffer makeFloatBuffer(float[] arr)
{
    ByteBuffer bb = ByteBuffer.allocateDirect(arr.length * 4);
    bb.order(ByteOrder.nativeOrder());
    FloatBuffer fb = bb.asFloatBuffer();
    fb.put(arr);
    fb.position(0);
    return fb;
}

public GLView(Context context) {
    super(context);
    setRenderer(this);
}

@Override
public void onDrawFrame(GL10 gl) {
    gl.glClearColor(0, 0, 0, 0);
    gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
    
    
    gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
    gl.glColorPointer(3, GL10.GL_FLOAT, 0, makeFloatBuffer(new float[] { 1, 0, 0,
                                                                         0, 1, 0,
                                                                         0, 0, 1 }));
    
    gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);       
    gl.glVertexPointer(3, GL10.GL_FLOAT, 0, makeFloatBuffer(new float[] { 0, 0, 0,
                                                                          0, 1, 0,
                                                                          1, 1, 0}));
    
    gl.glDrawArrays(GL10.GL_TRIANGLES, 0, 3);
}

@Override
public void onSurfaceChanged(GL10 gl, int width, int height) {
    gl.glViewport(0, 0, width, height);     
}

@Override
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
    
}
}

Any suggestions?

I'm guessing OpenGL state might be somewhat unspecified as you don't provide projection or model view matrices. But I'm guessing mostly as I'm not exactly familiar with OpenGL. Anyway I got your code to work by adding alpha values to color array

    gl.glColorPointer(4, GL10.GL_FLOAT, 0, makeFloatBuffer(new float[] { 1, 0, 0, 1,
                                                                         0, 1, 0, 1,
                                                                         0, 0, 1, 1 }));

And providing mentioned transformation matrices might do the trick on device.

@Override
public void onSurfaceChanged(GL10 gl, int width, int height) {
    gl.glViewport(0, 0, width, height);

        gl.glMatrixMode(GL10.GL_PROJECTION);
        gl.glLoadIdentity();
        GLU.gluOrtho2D(gl, -1.0f, 1.0f, -1.0f, 1.0f);
        gl.glMatrixMode(GL10.GL_MODELVIEW);
        gl.glLoadIdentity();
    }