Sending photo with public privacy

Through the code below, I can send a photo to the user's photos that is logged in, and the photo is sent successfully.

But the photo goes Friends .

How do I submit with Public privacy?

Bundle params = new Bundle();
/* make the API call */
params.putByteArray("source", byteArray); 
params.putString("caption", "Titulo");
params.putBoolean("published", true);

new GraphRequest(AccessToken.getCurrentAccessToken(), "/me/photos", params, HttpMethod.POST, new GraphRequest.Callback() {
    public void onCompleted(GraphResponse response) {
        Log.i(TAG, response.toString());
    }
}).executeAsync();