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我試圖使用Facebook圖形Api和解析API一起提取信息。調用Graph API時，GraphRepsone爲空。問題是因爲accessToken爲空，但我不知道如何嘗試許多不同的方式後修復。解析和Facebook SDK accessToken返回null
buttonSignUpWithFacebook.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// this is where you can begin doing facebook sign up process
Log.i(TAG, "did click on facebook button");
List<String> permissions = Arrays.asList("user_location", "user_friends", "email", "public_profile");
ParseFacebookUtils.logInWithReadPermissionsInBackground(SignUpActivity.this, permissions, new LogInCallback() {
@Override
public void done(ParseUser user, ParseException err) {
if (user == null) {
Log.d("App", "Uh oh. The user cancelled the Facebook login.");
} else if (user.isNew()) {
Log.d("App", "User signed up and logged in through Facebook!");
startActivity(new Intent(SignUpActivity.this, Home.class));
} else {
Log.d("App", "User logged in through Facebook!");
setupUser();
startActivity(new Intent(SignUpActivity.this, Home.class));
}
}
public void setupUser() {
accessToken = AccessToken.getCurrentAccessToken();
}
});
GraphRequest request = GraphRequest.newMeRequest(accessToken, new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object, GraphResponse response) {
if (response != null) {
try {
String email = object.getString("email");
String firstName = object.getString("first_name");
Log.d(TAG, "first name " + firstName);
} catch (JSONException e) {
e.printStackTrace();
}
// String firstName = jsonResponseObject.getFirstName();
// String lastName = jsonResponseObject.getLastName();
}
}
});
Bundle param = new Bundle();
param.putString("fields","cover, birthday, email, first_name, last_name, ");
request.setParameters(param);
request.executeAsync();
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
ParseFacebookUtils.onActivityResult(requestCode, resultCode, data);
}