尝试在Android应用中集成Facebook登录。登录和注销工作正常，但有时甚至在登录后，配置文件仍为空。一旦我从Facebook获得详细信息，我就会退出。我在Stackoverflow上提到了一些其他的问题，并将它应用于代码中，但某些地方仍然存在问题并且无法解决问题。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getApplicationContext());
setContentView(R.layout.login_activity);
callbackManager = CallbackManager.Factory.create();
loginButton = (LoginButton) findViewById(R.id.btnFacebookSignin);
loginButton.setReadPermissions("public_profile, email");
loginButton.registerCallback(callbackManager, facebookCallback);
}
FacebookCallback<LoginResult> facebookCallback = new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
if(Profile.getCurrentProfile() == null) {
mProfileTracker = new ProfileTracker() {
@Override
protected void onCurrentProfileChanged(Profile profile, Profile profile2) {
Log.v("facebook - profile", profile2.getFirstName());
mProfileTracker.stopTracking();
}
};
mProfileTracker.startTracking();
}
else {
Profile profile = Profile.getCurrentProfile();
Log.v("facebook - profile", profile.getFirstName());
}
GraphRequest request = GraphRequest.newMeRequest(
loginResult.getAccessToken(),
new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object, GraphResponse response) {
if (BuildConfig.DEBUG) {
FacebookSdk.setIsDebugEnabled(true);
FacebookSdk.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);
Profile profile = Profile.getCurrentProfile();
if (profile != null) {
String name = profile.getName();
Uri pictureUri = profile.getProfilePictureUri(200, 200);
String email = object.optString("email");
String uid = object.optString("id");
try {
sendLogin(uid, name, email, pictureUri.toString(), "fb");
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
facebookLogout();
} else {
facebookLogout();
Toast.makeText(getApplication(), "Something went wrong, please try again later", Toast.LENGTH_LONG).show();
}
}
}
});
Bundle parameters = new Bundle();
parameters.putString("fields", "email");
request.setParameters(parameters);
request.executeAsync();
}
@Override
public void onCancel() {
}
@Override
public void onError(FacebookException e) {
Toast.makeText(getApplication(), "Something went wrong, please try again later", Toast.LENGTH_LONG).show();
}
};
public void facebookLogout() {
LoginManager.getInstance().logOut();
}
答案 0 :(得分：1)
尝试此代码我希望它的工作..
facebookimage(object.getString("id"));
这是方法：
private void facebookimage(String id) {
new getFacebookImage(id).execute();
}
此AsyncTask课程可在Facebook上获取个人资料图片;
private class getFacebookImage extends AsyncTask {
String userID;
Bitmap camera;
public getFacebookImage(String id) {
userID=id;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected Object doInBackground(Object[] params) {
URL imageURL = null;
Bitmap bitmap=null;
try {
imageURL = new URL("https://graph.facebook.com/" + userID + "/picture?type=large");
bitmap = BitmapFactory.decodeStream(imageURL.openConnection().getInputStream());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Log.e("String Image",""+bitmap);
camera=bitmap;
return bitmap;
}
@Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
if(camera != null){
Log.e("Image Load","UPload image");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
camera.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte imageInByte[] = stream.toByteArray();
String encodedImage = Base64.encodeToString(imageInByte, Base64.DEFAULT);
DataBase.setUserImage(LoginActivity.this,encodedImage);
}
}
}
答案 1 :(得分：0)
最初我只在onCompleted的JSONObject对象中获取id和email。即使我设置了像“public_profile”和“email”这样的权限，足以从facebook获取id，姓名，电子邮件和个人资料图片。但在某个地方我出错并且不理解并添加了Profile并且做了getProfile（）所以我可以获得名称和个人资料图片。然后出现了其他问题，即使在登录完美之后，我有时会得到空的配置文件（可能是5次一次）。因为必须放置Profile Tracker，这是因为Profile异步工作（对我来说太混乱了，因为你必须放置跟踪器并开始和停止跟踪）。
然后我意识到我哪里出错了。在我们需要在json对象中提及我们想要的内容作为回复的包中，我只提到了“id”。所以现在在下面的代码中我添加了“name”和“email”。所以在JSONObject对象响应中我也得到了名称和电子邮件。
对于个人资料图片，我看到How can I display the users profile pic using the facebook graph api?并使用Uri构建器Use URI builder in Android or create URL with variables实现了这一点。因此，我完全删除了Profile的使用，仍然获得了我想要的所有数据。
这个答案是Destro - Android Facebook Login- Profile is null＆amp;提到的两个答案的混合。 How to get email id From Android Facebook SDK 4.6.0?
FacebookCallback<LoginResult> facebookCallback = new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(final LoginResult loginResult) {
GraphRequest request = GraphRequest.newMeRequest(
loginResult.getAccessToken(),
new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object, GraphResponse response) {
if (BuildConfig.DEBUG) {
FacebookSdk.setIsDebugEnabled(true);
FacebookSdk.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);
String uid = object.optString("id");
String email = object.optString("email");
String name = object.optString("name");
Uri.Builder builder = new Uri.Builder();
builder.scheme("https")
.authority("graph.facebook.com")
.appendPath(uid)
.appendPath("picture")
.appendQueryParameter("width", "1000")
.appendQueryParameter("height", "1000");
Uri pictureUri = builder.build();
try {
sendLogin(uid, name, email, pictureUri.toString(), "fb");
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
facebookLogout();
}
}
});
Bundle parameters = new Bundle();
parameters.putString("fields", "id, name, email");
request.setParameters(parameters);
request.executeAsync();
}
@Override
public void onCancel() {
}
@Override
public void onError(FacebookException e) {
Toast.makeText(getApplication(), "Something went wrong, please try again later", Toast.LENGTH_LONG).show();
}
};
public void facebookLogout() {
LoginManager.getInstance().logOut();
}