public void RecuperarULR() {
    Bundle bundle = getIntent().getExtras();
    String contenido = (String) bundle.get("contenido");

    img = contenido.split("<img alt="" src="");
    for (int i = 0; i < img.length; i++) {
        if (img[i].contains("http://itvillahermosa.edu.mx/uploads/")) {

            Toast.makeText(this, img[i], Toast.LENGTH_SHORT).show();

        }
    }
}