I have followed the steps on
https://github.com/ParsePlatform/ParseUI-Android
to use the ParseLoginUI library in my project.

Here is exactly what I have done in steps:

1. I added the following code to my app build.gardle
   dependencies {
   compile 'com.parse.bolts:bolts-android:1.+'
   compile 'com.parse:parse-android:1.+'
   }

2. Add the following code in my Application.onCreate to initialize the Parse library
   Parse.initialize(this,YOUR_APPLICATION_ID, YOUR_CLIENT_KEY);

3. add permissions to app manifest file
   
   

4. Add the following code in app build.gardle
   compile 'com.parse:parseui-login-android:0.0.1'
   compile 'com.parse:parseui-widget-android:0.0.1'

5. Add the following to the app manifest file within the section.
   

   
   
   

6. Add the following code to my MainActivity in the onCreate() before setContentView() -i don't know if the position of the code matters in this case or not -
   ParseLoginBuilder builder = new ParseLoginBuilder(MainActivity.this);
   startActivityForResult(builder.build(), 0);

7. Run the app

The app is compiled and run with no errors but when I write name and password and re-password and email then Press Create account, the app crashes and the following error appears in the logCat

07-12 16:36:01.730 2468-2468/? D/AndroidRuntime: Shutting down VM
07-12 16:36:01.730 2468-2468/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.gigamole.navigationtabbar, PID: 2468
java.lang.IllegalArgumentException: You must create this type of ParseObject using ParseObject.create() or the proper subclass.
at com.parse.ParseObject.(ParseObject.java:365)
at com.parse.ParseObject.(ParseObject.java:334)
at com.parse.ParseUser.(ParseUser.java:162)
at com.parse.ui.ParseSignupFragment.onClick(ParseSignupFragment.java:178)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
07-12 16:36:01.730 1361-1915/? W/ActivityManager: Force finishing activity com.gigamole.navigationtabbar/com.parse.ui.ParseLoginActivity

I really need this issue to be solved so that I could use the ParseLoginUi library in my project

I think this issue is similar to this one
Import project vs dependencies #125
But I don't find the right solution in this issue.