保存G +照片网址时，应用崩溃

Question

I am trying to save google email, name and profile photo url after a user signs in with Google account. When a user with google's default profile picture signs in, the app crashes. It works with google accounts having a custom profile photo

Here's the relevant code:

private void handleSignInResult(GoogleSignInResult result){

        Log.d(TAG,"handleSignInResult():"+result.isSuccess());
        if(result.isSuccess()){
            GoogleSignInAccount account = result.getSignInAccount();
            String pname = account.getDisplayName();
            String emailid = account.getEmail();
            String pic_url = new String(account.getPhotoUrl().toString());

            SharedPreferences userInfo = context.getSharedPreferences(getString(R.string.USER_INFO),Context.MODE_PRIVATE);
            SharedPreferences.Editor editor = userInfo.edit();
            editor.putString("name",pname);
            editor.putString("email",emailid);
            editor.putString("pic_url",pic_url);
            editor.commit();
            updateUI(true);
        } else {
            updateUI(false);
        }
    }

Here's is the part of logcat with exception:

--------- beginning of crash
10-16 20:02:33.731 32355 32355 E AndroidRuntime: FATAL EXCEPTION: main
10-16 20:02:33.731 32355 32355 E AndroidRuntime: Process: org.csikjsce.csi_kjsceofficial, PID: 32355
10-16 20:02:33.731 32355 32355 E AndroidRuntime: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=7, result=-1, data=Intent { (has extras) }} to activity {org.csikjsce.csi_kjsceofficial/org.csikjsce.csi_kjsceofficial.LoginActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.net.Uri.toString()' on a null object reference
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at android.app.ActivityThread.deliverResults(ActivityThread.java:4112)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at android.app.ActivityThread.handleSendResult(ActivityThread.java:4155)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at android.app.ActivityThread.access$1600(ActivityThread.java:186)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1658)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at android.os.Handler.dispatchMessage(Handler.java:111)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at android.os.Looper.loop(Looper.java:238)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at android.app.ActivityThread.main(ActivityThread.java:6016)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at java.lang.reflect.Method.invoke(Native Method)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:937)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:798)
10-16 20:02:33.731 32355 32355 E AndroidRuntime: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.net.Uri.toString()' on a null object reference
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at org.csikjsce.csi_kjsceofficial.LoginActivity.handleSignInResult(LoginActivity.java:179)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at org.csikjsce.csi_kjsceofficial.LoginActivity.onActivityResult(LoginActivity.java:207)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at android.app.Activity.dispatchActivityResult(Activity.java:6657)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    at android.app.ActivityThread.deliverResults(ActivityThread.java:4108)
10-16 20:02:33.731 32355 32355 E AndroidRuntime:    ... 9 more

Line no. 207 calls handleSignResult()

Line no. 179 is String pic_url = new String(account.getPhotoUrl().toString());

Commenting out line 179 fixes the issue but then I cannot save photo url that I need to show user's profile photo in my app.

The error occurs only with users that have the default profile photo on their google account.

I deleted my google plus photo to test it. The app crashed when I signed. Then I checked the photo url on my google plus account from chrome browser and I got this url https://lh3.googleusercontent.com/-eKoJemxhXNk/AAAAAAAAAAI/AAAAAAAAAAA/ACnBePZ9iFrmxpc1l5CPyKJ4DRH14A_Scg/s60-p-rw-no-mo/photo.jpg

The url is similar to the one that gets saved in shared_pref.xml when signing in with an account that has a custom profile photo. The above url is what the getPhotoUrl() must return. Its definitely not null, but still I get NPE on getPhotoUrl().toString() and app crashes.

Can someone explain why this is happening?

Answer 1

Error is solved with this simple trick:

String pic_url = ""+account.getPhotoUrl();

After hunting down for getPhotoUrl() method I found this

I had configured the sign in with DEFAULT_SIGN_IN flag but the first condition ie,

if user has a profile picture

is equivalent to user has default profile picture . So all users with default profile picture do not meet the first condition, thus method returns null.