Apps OpenGL Line

[zonk]

Can anyone tell me why this code crashes my app please?

        float line_vertex[]=
            {
                x1,y1, x2,y2
            };
        
        FloatBuffer vertexBuffer;
        ByteBuffer byteBuffer = ByteBuffer.allocateDirect(line_vertex.length * 4);
        byteBuffer.order(ByteOrder.nativeOrder());
        vertexBuffer = byteBuffer.asFloatBuffer();
        vertexBuffer.put(line_vertex);
        vertexBuffer.position(0);
        
        gl.glVertexPointer(2, GL10.GL_FLOAT, 0, vertexBuffer);
        gl.glDrawArrays(GL10.GL_LINES, 0, 2);

 

[zonk]

For reference, this is the sample project I started from, its OpenGL ES 1 though!

Texture Mapping – OpenGL Android (Displaying Images using OpenGL and Squares) | Against the Grain – Game Development