Nullpointerexcepetion Facebook Sdk V4.5.0 When Enable Proguard (when Try To Login Using Parse Library)

I'm trying to login with Facebook using ParseFacebookUtils library and it's working good but when i enabled the Proguard file i have this exception on Facebook login activity start

Solution 1:

I just added this line and it's working:

-keep classcom.facebook.** { *; }

Solution 2:

You have to add below lines into your file, That will resolve your problem.

Only need to add below lines.

-dontwarn com.facebook.**-keep class com.facebook.** { *; }-keepattributes Signature  

1. ignore the warning, or don't warn for the package com.facebook
2. keep the classes & inner classes as well inside that package.
3. keep the signature of attribute.

Solution 3:

try to add

-keep class com.facebook.* -keep class com.facebook.login.*

in your proguard file