将本地图像传递到Facebook墙

Question

我正在使用facebook库到Facebook墙进行图像共享，这是我的代码

/**
 * Function to post to facebook wall
 * */
public void postToWall() {
    // post on user's wall.
    Bundle params = new Bundle();
    params.putString("name", "name");
    params.putString("caption", "caption");
    params.putString("Discription", "Discription");
    params.putString("link", "https://play.google.com");
    params.putString("picture", "http://s3.buysellads.com/1266299/271750-1433251436.jpg");
    facebook.dialog(this, "feed", params, new DialogListener() {

        @Override
        public void onFacebookError(FacebookError e) {
        }

        @Override
        public void onError(DialogError e) {
        }

        @Override
        public void onComplete(Bundle values) {
        }

        @Override
        public void onCancel() {
        }
    });

}

这里我使用＆＃34; http://s3.buysellads.com/1266299/271750-1433251436.jpg＆＃34;张贴图片但我需要从drawable文件夹或从SD卡发布图像。请帮我 谢谢......