java Android Facebook SDK 4.X，如何获取电子邮件地址和 Facebook 访问令牌以将其传递给 Web 服务
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Android Facebook SDK 4.X , how to get Email address and Facebook Access Token to pass it to Web Service
提问by John
EDIT : My Question is how to get Email , UserId , Facebook Authentication with Facebook SDK 4.X , at this moment , with Ming Respond , i know how can i get Email , User Id , so my question is how to get Facebook Authentication since Session and GraphUser has just been replaced by LoginManager and AccessToken and there is no information about it?
编辑：我的问题是如何使用 Facebook SDK 4.X 获取电子邮件、用户 ID、Facebook 身份验证，此时，使用 Ming Respond，我知道如何获取电子邮件、用户 ID，所以我的问题是如何获取 Facebook 身份验证，因为Session 和 GraphUser 刚刚被 LoginManager 和 AccessToken 取代，没有相关信息？
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import com.facebook.AccessToken;
import com.facebook.AccessTokenTracker;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.Profile;
import com.facebook.ProfileTracker;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;
import java.util.Arrays;
public class RegisterActivity extends Activity {
private String fbUserID;
private String fbProfileName;
private String fbAuthToken;
private LoginButton fbLoginBtn;
private static final String TAG = "FacebookLogin";
CallbackManager callbackManager;
private AccessTokenTracker accessTokenTracker;
private ProfileTracker profileTracker;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.register_activity);
fbLoginBtn = (LoginButton) findViewById(R.id.connect_with_facebook_button);
fbLoginBtn.setReadPermissions(Arrays.asList("email", "user_photos", "public_profile"));
fbLoginBtn.setBackgroundResource(R.drawable.connect_facebook_button);
accessTokenTracker = new AccessTokenTracker() {
@Override
protected void onCurrentAccessTokenChanged(
AccessToken oldAccessToken,
AccessToken currentAccessToken) {
fbAuthToken = currentAccessToken.getToken();
fbUserID = currentAccessToken.getUserId();
Log.d(TAG, "User id: " + fbUserID);
Log.d(TAG, "Access token is: " + fbAuthToken);
}
};
profileTracker = new ProfileTracker() {
@Override
protected void onCurrentProfileChanged(
Profile oldProfile,
Profile currentProfile) {
fbProfileName = currentProfile.getName();
Log.d(TAG, "User name: " + fbProfileName );
}
};
fbLoginBtn.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
}
@Override
public void onCancel() {
// App code
}
@Override
public void onError(FacebookException exception) {
// App code
}
});
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
}
GraphRequest request = GraphRequest.newMeRequest(
accessToken,
new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(
JSONObject user,
GraphResponse response) {
String id = user.optString("id");
String firstName = user.optString("first_name");
String lastName = user.optString("last_name");
String email = user.optString("email");
}
@Override
public void onSaveInstanceState(Bundle savedState) {
super.onSaveInstanceState(savedState);
}
回答by Ming Li
fbLoginBtn.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
GraphRequest.newMeRequest(
loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject me, GraphResponse response) {
if (response.getError() != null) {
// handle error
} else {
String email = me.optString("email");
String id = me.optString("id");
// send email and id to your web server
}
}
}).executeAsync();
}
@Override
public void onCancel() {
// App code
}
@Override
public void onError(FacebookException exception) {
// App code
}
});
回答by vishal dharankar
Easiest answer that i found after hours of searching is as follows,the highest voted answer didn't work for me and email was alway empty
经过数小时的搜索，我找到的最简单的答案如下，投票最高的答案对我不起作用，电子邮件总是空的
LoginManager.getInstance().registerCallback(mCallbackManager,
new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
GraphRequest request = GraphRequest.newMeRequest(AccessToken.getCurrentAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object,GraphResponse response) {
JSONObject json = response.getJSONObject();
try {
if(json != null){
String text = json.getString("email");
Log.d("email",text);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
});
Bundle parameters = new Bundle();
parameters.putString("fields", "id,name,link,email,picture");
request.setParameters(parameters);
request.executeAsync();
}
@Override
public void onCancel() {
// App code
}
@Override
public void onError(FacebookException exception) {
// App code
}
});
I believe setting parameters as required fields to the Graph Request is a crucial thing here. You can also use this code with LoginButton, works without issue.
我相信将参数设置为图形请求的必填字段在这里至关重要。您也可以将此代码与 LoginButton 一起使用，可以正常工作。
****** Update******** After using this code with many accounts found that if the email isn't verified it won't be returned, in such case following code helped along with abo
****** 更新******** 将此代码与许多帐户一起使用后发现，如果电子邮件未通过验证，则不会返回，在这种情况下，以下代码与 abo 一起帮助
facebookLoginButton.setReadPermissions("email");
Hope this helps further
希望这有助于进一步
回答by maros136
I must add extra field for user Email.
我必须为用户电子邮件添加额外的字段。
//register facebook login callback
LoginManager.getInstance().registerCallback(mCallbackManager, new FacebookCallback<LoginResult>()
{
@Override
public void onSuccess (LoginResult loginResult)
{
Log.d(TAG, "FB: login success");
showLoading(true);
final String token = loginResult.getAccessToken().getToken();
//prepare fields with email
String[] requiredFields = new String[]{"email"};
Bundle parameters = new Bundle();
parameters.putString("fields", TextUtils.join(",", requiredFields));
GraphRequest requestEmail = new GraphRequest(loginResult.getAccessToken(), "me", parameters, null, new GraphRequest.Callback()
{
@Override
public void onCompleted (GraphResponse response)
{
if (response != null)
{
GraphRequest.GraphJSONObjectCallback callbackEmail = new GraphRequest.GraphJSONObjectCallback()
{
@Override
public void onCompleted (JSONObject me, GraphResponse response)
{
if (response.getError() != null)
{
Log.d(TAG, "FB: cannot parse email");
showDialog(getString(R.string.dialog_message_unknown_error));
showLoading(false);
}
else
{
String email = me.optString("email");
// send email and id to your web server
//...
}
}
};
callbackEmail.onCompleted(response.getJSONObject(), response);
}
}
});
requestEmail.executeAsync();
}
@Override
public void onCancel ()
{
Log.d(TAG, "FB: login cancel");
showDialog(getString(R.string.dialog_message_unknown_error));
}
@Override
public void onError (FacebookException e)
{
Log.d(TAG, "FB: login error " + e.getMessage());
showDialog(getString(R.string.dialog_message_unknown_error));
}
});
