我允许在我的应用程序中登录facebook但是当我从Facebook登录webview按Ok时崩溃，当我再次打开应用程序时，我能够在我的屏幕上看到退出按钮???
在OnActivityResult中获取错误，它在那里崩溃..
我在这里写日志。
我的LoginFragment.java
loginButton =（LoginButton）findViewById（R.id.login_button）; loginButton.setFragment（本）;
loginButton.setOnClickListener（new OnClickListener（）{
@Override
public void onClick(View v) {
checkLoginwithFB();
}
});
private void checkLoginwithFB() {
LoginManager.getInstance().registerCallback(callbackManager,
new FacebookCallback<LoginResult>() {
public void onSuccess(LoginResult loginResult)
{
LoginFragment.this.user = user;
Profile profile = Profile.getCurrentProfile();
RC_FB_SIGN_IN = loginButton.getRequestCode();
Log.e("===FIrstname===>", "===FIrstname===>"+profile.getFirstName());
if(profile !=null){
final String ID= profile.getId();
final String Name = profile.getName();
Log.e("===ID===>", "===ID===>"+profile.getId());
Log.e("===FIrstname===>","===FIrstname===>"+profile.getName());
// It's possible that we were waiting for this.user to be
// populated in order to post a
// status update.
//if (user != null) {
Log.e(TAG, ID);
Log.e(TAG,Name);
GraphRequest request = GraphRequest.newMeRequest(AccessToken.getCurrentAccessToken(), new GraphRequest.GraphJSONObjectCallback()
{
@Override
public void onCompleted(JSONObject object,
GraphResponse response) {
Map<String, String> map = new HashMap<String, String>();
map.put("url", URLS.LOGIN_WITH_FB_URL);
// map.put("email", "");
map.put("name", Name);
map.put("uid", ID);
new Controller(mainActivity, new AsyncTaskCompleteListener() {
@Override
public void onTaskCompleted(String doc,
int requestCode) {
try {
JSONObject jsonObject = new JSONObject(doc);
if (jsonObject.getInt("code") == 0) {
User user = new User();
long l = Long.parseLong(ID);
user.userID = jsonObject.getInt("user_id");
user.name = Name;
user.email = "";
user.isLogin = true;
CoddyzUtils.saveUser(mainActivity, user);
if (isReqLogin) {
mainActivity.setResult(Activity.RESULT_OK);
mainActivity.finish();
} else {
goToDeshboard(user);
}
}else{
}
//Toast.makeText(mainActivity, object.getString("message") + "", Toast.LENGTH_LONG).show();
} catch (Exception e) {
e.printStackTrace();
}
}
},map);
}});
Bundle parameters = new Bundle();
parameters.putString("fields", "id,name");
request.setParameters(parameters);
request.executeAsync();
// Log.e(TAG, user.asMap().toString());
// }else{
// Toast.makeText(getActivity(), "Ankitsir",
// Toast.LENGTH_LONG).show();
// }
} // Toast.makeText(mainActivity, "FETCH" +
// user.asMap().toString(), Toast.LENGTH_LONG).show();
else {
}
}
@Override
public void onCancel() {
// TODO Auto-generated method stub
}
@Override
public void onError(FacebookException error) {
System.out.println("onError");
Log.v("LoginActivity", error.getCause().toString());
}
});
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (FacebookSdk.isFacebookRequestCode(requestCode)) {
Log.d(TAG,"Callback:"+CallbackManagerImpl.RequestCodeOffset.Login.toRequestCode());
Log.d(TAG, "onActivityResult:" + requestCode + ":" + resultCode + ":" + data);
callbackManager.onActivityResult(requestCode,
resultCode, data);
}
}
03-04 21:30:57.923: E/AndroidRuntime(12641): FATAL EXCEPTION: main
03-04 21:30:57.923: E/AndroidRuntime(12641): Process: com.updatemania.foozup, PID: 12641
03-04 21:30:57.923: E/AndroidRuntime(12641): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=129742, result=-1, data=Intent { (has extras) }} to activity {com.updatemania.foozup/com.example.foo.LoginSignUpActivity}: java.lang.NullPointerException
03-04 21:30:57.923: E/AndroidRuntime(12641): at android.app.ActivityThread.deliverResults(ActivityThread.java:3532)
03-04 21:30:57.923: E/AndroidRuntime(12641): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3575)
03-04 21:30:57.923: E/AndroidRuntime(12641): at android.app.ActivityThread.access$1300(ActivityThread.java:139)
03-04 21:30:57.923: E/AndroidRuntime(12641): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1341)
03-04 21:30:57.923: E/AndroidRuntime(12641): at android.os.Handler.dispatchMessage(Handler.java:102)
03-04 21:30:57.923: E/AndroidRuntime(12641): at android.os.Looper.loop(Looper.java:149)
03-04 21:30:57.923: E/AndroidRuntime(12641): at android.app.ActivityThread.main(ActivityThread.java:5257)
03-04 21:30:57.923: E/AndroidRuntime(12641): at java.lang.reflect.Method.invokeNative(Native Method)
03-04 21:30:57.923: E/AndroidRuntime(12641): at java.lang.reflect.Method.invoke(Method.java:515)
03-04 21:30:57.923: E/AndroidRuntime(12641): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-04 21:30:57.923: E/AndroidRuntime(12641): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
03-04 21:30:57.923: E/AndroidRuntime(12641): at dalvik.system.NativeStart.main(Native Method)
03-04 21:30:57.923: E/AndroidRuntime(12641): Caused by: java.lang.NullPointerException
03-04 21:30:57.923: E/AndroidRuntime(12641): at example.foo.fragments.LoginFragment$2.onSuccess(LoginFragment.java:242)
03-04 21:30:57.923: E/AndroidRuntime(12641): at example.foo.fragments.LoginFragment$2.onSuccess(LoginFragment.java:1)
03-04 21:30:57.923: E/AndroidRuntime(12641): at com.facebook.login.LoginManager.finishLogin(LoginManager.java:510)
03-04 21:30:57.923: E/AndroidRuntime(12641): at com.facebook.login.LoginManager.onActivityResult(LoginManager.java:194)
03-04 21:30:57.923: E/AndroidRuntime(12641): at com.facebook.login.LoginManager$1.onActivityResult(LoginManager.java:141)
03-04 21:30:57.923: E/AndroidRuntime(12641): at com.facebook.internal.CallbackManagerImpl.onActivityResult(CallbackManagerImpl.java:82)
03-04 21:30:57.923: E/AndroidRuntime(12641): at com.updatemania.foozup.fragments.LoginFragment.onActivityResult(LoginFragment.java:377)
03-04 21:30:57.923: E/AndroidRuntime(12641): at android.support.v4.app.FragmentActivity.onActivityResult(FragmentActivity.java:156)
03-04 21:30:57.923: E/AndroidRuntime(12641): at android.app.Activity.dispatchActivityResult(Activity.java:5603)
03-04 21:30:57.923: E/AndroidRuntime(12641): at android.app.ActivityThread.deliverResults(ActivityThread.java:3528)
03-04 21:30:57.923: E/AndroidRuntime(12641): ... 11 more
答案 0 :(得分：0)
我猜你忘了从你活动的onActivityResult（）调用CallbackManager.onActivityResult（）。请参阅https://developers.facebook.com/docs/facebook-login/android