Android和Facebook:如何获取登录用户的图片

Question

我在Android应用程序中使用官方Facebook SDK.用户登录后,我可以获取uid和facebook用户的名称,如下所示:

Facebook mFacebook = new Facebook(APP_ID);
// ... user logs in ...
//String jsonUser = mFacebook.request("me/picture"); // throws error
String jsonUser = mFacebook.request("me");
JSONObject obj = Util.parseJson(jsonUser);
String facebookId = obj.optString("id");
String name = obj.optString("name");

我也知道我可以使用这些链接访问个人资料图片:

https://graph.facebook.com/<facebookId>/picture 
https://graph.facebook.com/<facebookId>/picture?type=large

我很乐意使用此代码来查看个人资料图片:

public static Drawable getPictureForFacebookId(String facebookId) {

    Drawable picture = null;
    InputStream inputStream = null;

    try {
        inputStream = new URL("https://graph.facebook.com/" + facebookId + "/picture").openStream();
    } catch (Exception e) {        
     e.printStackTrace();
     return null;

    }
    picture = Drawable.createFromStream(inputStream, "facebook-pictures");

    return picture;
}

但它不会工作.我总是得到以下错误:

SSL handshake failure: Failure in SSL library, usually a protocol error

我无法解决这个问题.它似乎相当复杂(看这里或这里).那么有什么其他选项可以让Facebook用户成功登录我的应用程序？

Answer 1

ImageView user_picture;
 userpicture=(ImageView)findViewById(R.id.userpicture);
 URL img_value = null;
 img_value = new URL("http://graph.facebook.com/"+id+"/picture?type=large");
 Bitmap mIcon1 = BitmapFactory.decodeStream(img_value.openConnection().getInputStream());
 userpicture.setImageBitmap(mIcon1);

ID是你的个人资料ID ...

Answer 2

前段时间我也遇到过这个问题.我所做的是使用异步任务下载图片,然后使用刚下载的图像设置ImageView.我将粘贴代码段:

ImageView fbUserAvatar = (ImageView) findViewById(R.id.fb_user_avatar);

private synchronized void downloadAvatar() {
    AsyncTask<Void, Void, Bitmap> task = new AsyncTask<Void, Void, Bitmap>() {

        @Override
        public Bitmap doInBackground(Void... params) {
            URL fbAvatarUrl = null;
            Bitmap fbAvatarBitmap = null;
            try {
                fbAvatarUrl = new URL("http://graph.facebook.com/"+USER_ID+"/picture");
                fbAvatarBitmap = BitmapFactory.decodeStream(fbAvatarUrl.openConnection().getInputStream());
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return fbAvatarBitmap;
        }

        @Override
        protected void onPostExecute(Bitmap result) {
            fbUserAvatar.setImageBitmap(result);
        }

    };
    task.execute();
}

这段代码适合我.我希望它对你也有用.

Answer 3

您可以请求包含您的访问令牌的直接URl:

URL MyProfilePicURL = new URL("https://graph.facebook.com/me/picture?type=normal&method=GET&access_token="+ Access_token );

然后获取解码的BitMap并将其分配给图像视图:

Bitmap MyprofPicBitMap = null;
try {
    MyprofPicBitMap = BitmapFactory.decodeStream(MyProfilePicURL.openConnection().getInputStream());
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

MyProfilePicImageView.setImageBitmap(mIcon1);

Answer 4

request("me/picture") 会抛出错误，因为服务器返回 302（重定向到图像 url），而 facebook sdk 不处理此问题。