facebook android SDK：调用分数 API

Question

我想通过 facebook Android SDK 使用 Facebook Score API（设置和读取用户和朋友的分数）。

Facebook 文档说：

读取玩家的分数

您可以通过发出 HTTP 来读取玩您游戏的人的分数 使用用户或应用 access_token 向 /USER_ID/scores 发出 GET 请求。

[https://developers.facebook.com/docs/games/scores/][1]

但是这个文档太少了，并且没有找到关于这个的示例。 在 facebook android SDK (friendsmash) 中发现了一个带有排行榜的 android 示例，但该示例使用自己的服务器而不是 Score API。

谁能给我们一些示例或更详细的说明，说明我们如何做到这一点？

Answer 1

facebook 开发者博客上有一个更详细的示例，但它是在 php 中。我同意，但似乎缺少文档。

来源：https://developers.facebook.com/blog/post/539/

以下 PHP 示例演示了如何访问 signed_request 参数、应用访问令牌并提示用户授权您的应用获得 publish_actions 权限：

<?php
$app_id = 'YOUR_APP_ID';
$app_secret = 'YOUR_APP_SECRET';
$canvas_page_url = 'YOUR_CANVAS_PAGE_URL';

// Authenticate the user
session_start();
if  (isset($_REQUEST["code"])) {
$code = $_REQUEST["code"];
}

if(empty($code) && !isset($_REQUEST['error'])) {
$_SESSION['state'] = md5(uniqid(rand(), TRUE)); //CSRF protection
$dialog_url = 'https://www.facebook.com/dialog/oauth?' 
  . 'client_id=' . $app_id
  . '&redirect_uri=' . urlencode($canvas_page_url)
  . '&state=' . $_SESSION['state']
  . '&scope=publish_actions';

print('<script> top.location.href=\'' . $dialog_url . '\'</script>');
exit;
} else if(isset($_REQUEST['error'])) { 
// The user did not authorize the app
print($_REQUEST['error_description']);
exit;
};

// Get the User ID
$signed_request = parse_signed_request($_POST['signed_request'],
$app_secret);

$uid = $signed_request['user_id'];
echo 'Welcome User: ' . $uid;

// Get an App Access Token
$token_url = 'https://graph.facebook.com/oauth/access_token?'
. 'client_id=' . $app_id
. '&client_secret=' . $app_secret
. '&grant_type=client_credentials';

$token_response = file_get_contents($token_url);
$params = null;
parse_str($token_response, $params);
$app_access_token = $params['access_token'];

function parse_signed_request($signed_request, $secret) {
list($encoded_sig, $payload) = explode('.', $signed_request, 2); 

// decode the data
$sig = base64_url_decode($encoded_sig);
$data = json_decode(base64_url_decode($payload), true);

if (strtoupper($data['algorithm']) !== 'HMAC-SHA256') {
  error_log('Unknown algorithm. Expected HMAC-SHA256');
  return null;
}

// check sig
$expected_sig = hash_hmac('sha256', $payload, $secret, $raw = true);
if ($sig !== $expected_sig) {
  error_log('Bad Signed JSON signature!');
  return null;
}

return $data;
}

function base64_url_decode($input) {
return base64_decode(strtr($input, '-_', '+/'));
}
?>

发布用户得分

https://graph.facebook.com/USER_ID/scores?
score=USER_SCORE&access_token=APP_ACCESS_TOKEN

Answer 2

在Android中使用Score API的代码sn-ps如下。

Post score:(登录成功后调用)

final ProgressDialog dialog = ProgressDialog.show(MainActivity.this, "", "Please wait");
Bundle param = new Bundle();
param.putInt("score", 11000);
Request request = new Request(Session.getActiveSession(), "me/scores", param , HttpMethod.POST);
request.setCallback(new Request.Callback()
{
    @Override
    public void onCompleted(Response response)
    {
        Log.d("log_tag", "response: " + response.toString());
        dialog.dismiss();
    }
});
request.executeAsync();

获取申请的所有分数：（登录成功后调用）

final ProgressDialog dialog = ProgressDialog.show(MainActivity.this, "", "Please wait");
Request request = new Request(Session.getActiveSession(), "<app_id>/scores", null, HttpMethod.GET);
request.setCallback(new Request.Callback()
{
    @Override
    public void onCompleted(Response response)
    {
        Log.d("log_tag", "response: " + response.toString());
        dialog.dismiss();
    }
});
request.executeAsync();

请点击此链接了解更多详情：https://developers.facebook.com/docs/games/scores/