机器人 : facebook login using facebook sdk 3 with no facebook app installed

Question

我在我的应用程序中使用 facebook sdk 3。我想获取一些用户信息以用于我的应用程序。如果我的设备中安装了 Facebook 应用程序，它会很好用。它要求登录，如果它没有登录并且工作。但我希望即使设备上没有安装 facebook 应用程序，我的应用程序也能正常工作。我该怎么做。我的代码如下。请帮忙

Session.openActiveSession(this, true, new Session.StatusCallback() {

        // callback when session changes state
        @Override
        public void call(Session session, SessionState state,
                Exception exception) {
            if (session.isOpened()) {
                // make request to the /me API
                Request.executeMeRequestAsync(session,
                        new Request.GraphUserCallback() {

                            // callback after Graph API response with user
                            // object
                            @Override
                            public void onCompleted(GraphUser graphuser,
                                    Response response) {
                                L
                                if (graphuser != null) {
                                    GraphObject graphObject = response
                                            .getGraphObject();
                                    Log.i(" facebookLogin Email is ",
                                            "value"
                                                    + graphObject
                                                            .getProperty("email"));
                                    User user = getUserDetails(graphObject,
                                            graphuser.getId());
                                    sendFBCredentialsToServer(user);
                                    updateSharedPrefsWithFacebookCredentials(user);

                                }
                            }

                        });
                Toast.makeText(getApplicationContext(),
                        "Pls wait , Fetching data", Toast.LENGTH_LONG)
                        .show();
            }
        }
    });

Answer 1

// Add code to print out the key hash


try {
PackageInfo info = getPackageManager().getPackageInfo(
        "com.your.packagename", 
        PackageManager.GET_SIGNATURES);
for (Signature signature : info.signatures) {
    MessageDigest md = MessageDigest.getInstance("SHA");
    md.update(signature.toByteArray());
    Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));// g
    }
} catch (NameNotFoundException e) {

} catch (NoSuchAlgorithmException e) {

}

在 onCreate 上添加此代码并从 facebook 获取哈希键并在 facebook 上的应用程序设置中替换此键