我正在学习Firebase，我对术语有点困惑。我的Facebook登录按钮有以下代码，似乎我成功地对我的用户进行了身份验证。但是，我有点困惑，因为我想＆＃34;写＆＃34;使用.setValue方法的Firebase子级。
我不知道在我的代码中我会在哪里写这个方法，而且我不知道我会使用什么（我假设Facebook ID是用户ID但不确定访问令牌/密码）。此外，由于我现在有Facebook回调和Firebase回调，我不确定在哪里添加.setValue方法来从Firebase添加SimpleLogin。
以下是我的LoginActivity代码：
public class LoginActivity extends AppCompatActivity {
private LoginButton mFacebookLoginButton;
private CallbackManager mFacebookCallbackManager;
private AccessTokenTracker mFacebookAccsesTokenTracker;
private static final String TAG = "LOGIN_TAG";
private ProgressDialog mAuthProgressDialog;
private AuthData mAuthData;
private TextView mLoggedInStatusTextView;
private Firebase.AuthStateListener mAuthStateListener;
public Firebase mFirebaseRef;
@Override
protected void onCreate(Bundle savedInstanceState) {
FacebookSdk.sdkInitialize(getApplicationContext());
super.onCreate(savedInstanceState);
Firebase.setAndroidContext(this);
setContentView(R.layout.activity_login);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mFirebaseRef = new Firebase("https://fan-polls.firebaseio.com");
mLoggedInStatusTextView = (TextView) findViewById(R.id.login_status);
mFacebookCallbackManager = CallbackManager.Factory.create();
mFacebookLoginButton = (LoginButton) findViewById(R.id.login_with_facebook);
mFacebookLoginButton.setReadPermissions("email");
mFacebookAccsesTokenTracker = new AccessTokenTracker() {
@Override
protected void onCurrentAccessTokenChanged(AccessToken oldAccessToken, AccessToken currentAccessToken) {
Log.i(TAG, "Facebook.AccessTokenTracker.OnCurrentAccessTokenChanged");
LoginActivity.this.onFacebookAccessTokenChange(currentAccessToken);
}
};
mAuthProgressDialog = new ProgressDialog(this);
mAuthProgressDialog.setTitle("Loading");
mAuthProgressDialog.setMessage("Authenticating with Firebase...");
mAuthProgressDialog.setCancelable(false);
mAuthProgressDialog.show();
mAuthStateListener = new Firebase.AuthStateListener() {
@Override
public void onAuthStateChanged(AuthData authData) {
mAuthProgressDialog.hide();
setAuthenticatedUser(authData);
}
};
/* Check if the user is authenticated with Firebase already. If this is the case we can set the authenticated
* user and hide hide any login buttons */
mFirebaseRef.addAuthStateListener(mAuthStateListener);
mFacebookLoginButton.registerCallback(mFacebookCallbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
Log.i(TAG, "LoginButton FacebookCallback onSuccess");
mLoggedInStatusTextView.setText("IT WORKS");
}
@Override
public void onCancel() {
Log.i(TAG, "LoginButton FacebookCallback onCancel");
}
@Override
public void onError(FacebookException error) {
Log.i(TAG, "LoginButton FacebookCallback FacebookException");
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
mFacebookCallbackManager.onActivityResult(requestCode, resultCode, data);
}
private void onFacebookAccessTokenChange(AccessToken token) {
if (token != null) {
mAuthProgressDialog.show();
mFirebaseRef.authWithOAuthToken("facebook", token.getToken(), new AuthResultHandler("facebook"));
} else {
// Logged out of Facebook and currently authenticated with Firebase using Facebook, so do a logout
if (this.mAuthData != null && this.mAuthData.getProvider().equals("facebook")) {
mFirebaseRef.unauth();
setAuthenticatedUser(null);
}
}
}
@Override
protected void onResume() {
super.onResume();
// Logs 'install' and 'app activate' App Events.
AppEventsLogger.activateApp(getApplicationContext());
}
@Override
protected void onPause() {
super.onPause();
// Logs 'app deactivate' App Event.
AppEventsLogger.deactivateApp(getApplicationContext());
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_login, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
private void logout() {
if (this.mAuthData != null) {
/* logout of Firebase */
mFirebaseRef.unauth();
/* Logout of any of the Frameworks. This step is optional, but ensures the user is not logged into
* Facebook/Google+ after logging out of Firebase. */
if (this.mAuthData.getProvider().equals("facebook")) {
/* Logout from Facebook */
LoginManager.getInstance().logOut();
}
/* Update authenticated user and show login buttons */
setAuthenticatedUser(null);
}
}
/**
* This method will attempt to authenticate a user to firebase given an oauth_token (and other
* necessary parameters depending on the provider)
*/
private void authWithFirebase(final String provider, Map<String, String> options) {
if (options.containsKey("error")) {
showErrorDialog(options.get("error"));
} else {
mAuthProgressDialog.show();
if (provider.equals("twitter")) {
// if the provider is twitter, we pust pass in additional options, so use the options endpoint
mFirebaseRef.authWithOAuthToken(provider, options, new AuthResultHandler(provider));
} else {
// if the provider is not twitter, we just need to pass in the oauth_token
mFirebaseRef.authWithOAuthToken(provider, options.get("oauth_token"), new AuthResultHandler(provider));
}
}
}
/**
* Once a user is logged in, take the mAuthData provided from Firebase and "use" it.
*/
private void setAuthenticatedUser(AuthData authData) {
if (authData != null) {
/* Hide all the login buttons */
mLoggedInStatusTextView.setVisibility(View.VISIBLE);
/* show a provider specific status text */
String name = null;
if (authData.getProvider().equals("facebook")
|| authData.getProvider().equals("google")
|| authData.getProvider().equals("twitter")) {
name = (String) authData.getProviderData().get("displayName");
} else if (authData.getProvider().equals("anonymous")
|| authData.getProvider().equals("password")) {
name = authData.getUid();
} else {
Log.e(TAG, "Invalid provider: " + authData.getProvider());
}
if (name != null) {
mLoggedInStatusTextView.setText("Logged in as " + name + " (" + authData.getProvider() + ")");
}
} else {
/* No authenticated user show all the login buttons */
mFacebookLoginButton.setVisibility(View.VISIBLE);
mLoggedInStatusTextView.setVisibility(View.GONE);
}
this.mAuthData = authData;
/* invalidate options menu to hide/show the logout button */
supportInvalidateOptionsMenu();
}
/**
* Show errors to users
*/
private void showErrorDialog(String message) {
new AlertDialog.Builder(this)
.setTitle("Error")
.setMessage(message)
.setPositiveButton(android.R.string.ok, null)
.setIcon(android.R.drawable.ic_dialog_alert)
.show();
}
private class AuthResultHandler implements Firebase.AuthResultHandler {
private final String provider;
public AuthResultHandler(String provider) {
this.provider = provider;
}
@Override
public void onAuthenticated(AuthData authData) {
mAuthProgressDialog.hide();
Log.i(TAG, provider + " auth successful");
setAuthenticatedUser(authData);
mFirebaseRef.child("users").setValue(authData.getAuth());
}
@Override
public void onAuthenticationError(FirebaseError firebaseError) {
mAuthProgressDialog.hide();
showErrorDialog(firebaseError.toString());
}
}
}
答案 0 :(得分：1)
Firebase提供了自己的设计库来集成Facebook，Twitter和Google，与手动创建所有XML及相关代码相比，它更加轻松：