java - OPENGL ES 2.0 texture in circle -

trying load texture circle, have big troubles it. original texture:

original texture

here's code:

private void circle(){     int segments = 20;     vertices = new float[segments * 3+6];     texture = new float[segments * 3+6];     float angle = (float)(2*math.pi/segments);     vertices[0]=0;     vertices[1]=0;     texture[0]=0.5f;     texture[1]=0.5f;     for(int = 0; < segments; i++){          vertices[3+(i*3)]=(float)math.sin(angle * i)*0.7f;         vertices[3+(i*3+1)]=(float)math.cos(angle*i)*0.7f;          texture[3+(i*3)]=(float)math.sin(angle * i)*0.5f+0.5f;         texture[3+(i*3+1)]=(float)math.cos(angle * i)*0.5f+0.5f;      }     vertices[3*segments+3]=0;     vertices[3*segments+4]=0.7f;                } 

and getting this: my result

what doing wrong? thank you