我正在尝试将 Facebook 登录与我的应用程序集成。这很简单：用户在我的登录屏幕上单击一个按钮，我从 Facebook 获取他们的电子邮件和其他信息，然后我将这些信息提交到我的网站并让他们成为一个帐户（我不使用密码，所以这是可行的）。
但是，登录按钮的工作时间只有 1/3。其他时候它启动 Facebook 活动，我在 Facebook 屏幕上看到一个加载微调器，然后应用程序退出到我的主屏幕。没有强制关闭通知，没有 logcat 错误，什么都没有。
这是我的登录活动的代码（与 Facebook 相关的部分）：
package com.taptag.beta;
/** IMPORTS REMOVED FOR BREVITY **/
public class FacebookLogInActivity extends NetworkActivity {
public static final String APP_ID = "OMITTED FOR PRIVACY";
public static final String LOG_OUT = "Log Out";
Facebook facebook = new Facebook(APP_ID);
private AsyncFacebookRunner mAsyncRunner;
private Handler mHandler;
private SharedPreferences mPrefs;
private Button mLoginButton;
private static final String[] PERMISSIONS = { "email" };
private EditText firstName;
private EditText lastName;
private EditText email;
private Button signupButton;
private TextView errorView;
private ProgressBar facebookSpinner;
private ProgressBar signupSpinner;
//Taken from mkyong
private static final String EMAIL_PATTERN = "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
private Pattern emailPattern;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.facebook_main);
mPrefs = getSharedPreferences("TapTag", MODE_PRIVATE);
Integer userId = mPrefs.getInt("user_id", -1);
mLoginButton = (Button) findViewById(R.id.loginButton);
// Facebook properties
mAsyncRunner = new AsyncFacebookRunner(facebook);
mHandler = new Handler();
// Get existing saved session information
String access_token = mPrefs.getString("access_token", null);
long expires = mPrefs.getLong("access_expires", 0);
if (access_token != null) {
facebook.setAccessToken(access_token);
}
if (expires != 0) {
facebook.setAccessExpires(expires);
}
errorView = (TextView) findViewById(R.id.signupError);
facebookSpinner = (ProgressBar) findViewById(R.id.facebookSpinner);
signupSpinner = (ProgressBar) findViewById(R.id.signupSpinner);
hideSpinners();
errorView.setVisibility(View.GONE);
emailPattern = Pattern.compile(EMAIL_PATTERN);
firstName = (EditText) findViewById(R.id.signupFirstName);
lastName = (EditText) findViewById(R.id.signupLastName);
email = (EditText) findViewById(R.id.signupEmail);
signupButton = (Button) findViewById(R.id.signupButton);
signupButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
boolean isValid = validateInputs();
if (isValid) {
SignupTask signupTask = new SignupTask();
signupTask.execute(null, null);
}
}
});
mLoginButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (!facebook.isSessionValid()) {
logIn();
} else {
logOut();
}
}
});
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
facebook.authorizeCallback(requestCode, resultCode, data);
}
@Override
public void onResume() {
super.onResume();
// Extend the session information if it is needed
//if (facebook != null && !facebook.isSessionValid()) {
facebook.extendAccessTokenIfNeeded(this, null);
//}
if (LOG_OUT.equals(getIntent().getAction())) {
logOut();
} else {
Integer userId = mPrefs.getInt("user_id", -1);
if (userId > 0) {
continueToHomeScreen();
}
}
}
@Override
public void onBackPressed() {
//Do nothing, don't want people getting back into the app
}
/**
* Validate the signup form. True if valid, false otherwise.
* @return
*/
public boolean validateInputs() {
/** NOT RELEVANT **/
}
private FacebookUserInfo userFromForm() {
/** NOT RELEVANT **/
}
private boolean validateFirstName() {
/** NOT RELEVANT **/
}
private boolean validateLastName() {
/** NOT RELEVANT **/
}
private boolean validateEmail() {
/** NOT RELEVANT **/
}
public void hideSpinners() {
facebookSpinner.setVisibility(View.GONE);
signupSpinner.setVisibility(View.GONE);
}
public void continueToHomeScreen() {
Intent toHomeScreen = new Intent(FacebookLogInActivity.this, HomeScreenActivity.class);
FacebookLogInActivity.this.startActivity(toHomeScreen);
}
public void logIn() {
facebookSpinner.setVisibility(View.VISIBLE);
mLoginButton.setVisibility(View.GONE);
facebook.authorize(FacebookLogInActivity.this, PERMISSIONS, new DialogListener() {
@Override
public void onComplete(Bundle values) {
SharedPreferences.Editor editor = mPrefs.edit();
editor.putString("access_token", facebook.getAccessToken());
editor.putLong("access_expires", facebook.getAccessExpires());
editor.commit();
requestUserData();
}
@Override
public void onFacebookError(FacebookError e) {
mLoginButton.setVisibility(View.VISIBLE);
hideSpinners();
}
@Override
public void onError(DialogError e) {
mLoginButton.setVisibility(View.VISIBLE);
hideSpinners();
}
@Override
public void onCancel() {
mLoginButton.setVisibility(View.VISIBLE);
hideSpinners();
}
});
}
public void logOut() {
/** NOT RELEVANT **/
}
public void requestUserData() {
Bundle params = new Bundle();
params.putString("field name", "name");
params.putString("field email", "email");
mAsyncRunner.request("me", params, new BaseRequestListener() {
@Override
public void onComplete(final String response, final Object state) {
FacebookUserInfo facebookUserInfo = TapTagAPI.userInfoFromFacebook(response);
UserFetchResponse userFetchResponse = TapTagAPI.fetchUser(facebookUserInfo);
if (!userFetchResponse.hasError()) {
commitUserInfo(userFetchResponse);
continueToHomeScreen();
} else {
mHandler.post(new Runnable() {
@Override
public void run() {
hideSpinners();
mLoginButton.setVisibility(View.VISIBLE);
}
});
}
}
});
}
public void commitUserInfo(UserFetchResponse userFetchResponse) {
SharedPreferences.Editor editor = mPrefs.edit();
editor.putInt("user_id", userFetchResponse.getId());
editor.putString("user_name", userFetchResponse.getFirst() + " " + userFetchResponse.getLast());
editor.commit();
}
public class SignupTask extends AsyncTask<Void, Void, UserFetchResponse> {
@Override
protected void onPreExecute() {
signupSpinner.setVisibility(View.VISIBLE);
signupButton.setVisibility(View.GONE);
}
@Override
protected UserFetchResponse doInBackground(Void... arg0) {
FacebookUserInfo user = userFromForm();
UserFetchResponse response = TapTagAPI.fetchUser(user);
return response;
}
@Override
protected void onPostExecute(UserFetchResponse response) {
if (response.success()) {
commitUserInfo(response);
continueToHomeScreen();
} else {
errorView.setVisibility(View.VISIBLE);
}
}
}
}