在我的應用程序中,我使用Parse.com和Facebook登錄,並且Facebook登錄正在運行,現在我正在嘗試保存簽名用戶的電子郵件。我這樣做是這樣的:Android - Parse.com保存對象時出現NullPointerException
Request.newMeRequest(ParseFacebookUtils.getSession(), new Request.GraphUserCallback() {
// callback after Graph API response with user object
@Override
public void onCompleted(GraphUser user, Response response) {
if (user != null) {
String email = user.getProperty("email").toString();
Log.i(TAG, email);
ParseUser currentUser = ParseUser.getCurrentUser();
currentUser.put("email", email);
currentUser.saveInBackground();
}
}
}).executeAsync()
但是當我跑我得到java.lang.NullPointerException
在該行currentUser.put("email", email);
但我在此之前登錄電子郵件,它不爲空,我有解析我的User類電子郵件屬性,所以我不知道這是爲什麼?
這裏的代碼來設置FB登錄你應該需要它,它正在工作,但以防萬一。
public void onLoginClick(View v) {
progressDialog = ProgressDialog.show(LoginActivity.this, "", "Logging in...", true);
final List<String> permissions = Arrays.asList("public_profile", "email");
// NOTE: for extended permissions, like "user_about_me", your app must be reviewed by the Facebook team
// (https://developers.facebook.com/docs/facebook-login/permissions/)
ParseFacebookUtils.logIn(permissions, this, new LogInCallback() {
@Override
public void done(ParseUser user, ParseException err) {
progressDialog.dismiss();
if (user == null) {
Log.d(TAG, "Uh oh. The user cancelled the Facebook login.");
} else if (user.isNew()) {
Log.d(TAG, "User signed up and logged in through Facebook!");
showSelectSchoolActivity();
} else {
Log.d(TAG, "User logged in through Facebook!");
showMainActivity();
}
}
});
感謝您的幫助:)
'Parser.getCurrentUser()'返回null? – RandomQuestion 2014-12-04 04:30:45
嘗試將ParseUser代碼放入try-catch塊。 – 2014-12-04 04:32:22
@RandomQuestion我加了這行'Log.i(TAG,currentUser.toString());'並且錯誤在於它,所以我認爲你是對的,我該如何解決這個問題? – iqueqiorio 2014-12-04 04:33:52