Firebase Auth - Facebook login
使用Firebase來做FaceBook Ｌogin,
先弄好Facebook開發者帳號和建立開發專案且取得應用程式ID和密鑰。
* 1.在dependencies加入
dependencies {
compile 'com.google.firebase:firebase-auth:9.6.1'
compile 'com.facebook.android:facebook-android-sdk:4.16.0'
}
2.先處理好Facebook登入,必要處理.
protected void onCreate(@Nullable Bundle savedInstanceState) {
FacebookSdk.sdkInitialize(this);
super.onCreate(savedInstanceState);
mCallbackManager = CallbackManager.Factory.create();
LoginButton loginButton = (LoginButton) findViewById(R.id.login_button);
loginButton.setReadPermissions("email", "public_profile");
loginButton.registerCallback(mCallbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
Log.d(TAG, "facebook:onSuccess:" + loginResult);
handleFacebookAccessToken(loginResult.getAccessToken());
}
@Override
public void onCancel() {
Log.d(TAG, "facebook:onCancel");
// ...
}
@Override
public void onError(FacebookException error) {
Log.d(TAG, "facebook:onCancel"+error.toString());
}
});
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
mCallbackManager.onActivityResult(requestCode,resultCode,data);
//...
}
- 3.最後取得Facebook的Ａuth token,然後找以下方式就完成登入了,登入成功後可以取的FirebaseUser物件
private void handleFacebookAccessToken(AccessToken token) {
Log.d(TAG, "handleFacebookAccessToken:" + token);
AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
mAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
Log.d(TAG, "signInWithCredential:onComplete:" + task.isSuccessful());
// If sign in fails, display a message to the user. If sign in succeeds
// the auth state listener will be notified and logic to handle the
// signed in user can be handled in the listener.
if (!task.isSuccessful()) {
Log.w(TAG, "signInWithCredential", task.getException());
Toast.makeText(LoginActivity.this, "Authentication failed.",
Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(LoginActivity.this, "login success",
Toast.LENGTH_SHORT).show();
finish();
}
}
});
}