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Attempt to invoke virtual method 'void android.widget.ImageView.setAlpha(float)' on a null object reference
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Attempt to invoke virtual method 'void android.widget.ListView.setAdapter(android.widget.ListAdapter)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setAlpha(float)' on a null object reference	at com.firebase.ui.auth.ui.email.ImageFocusTransparencyChanger.(ImageFocusTransparencyChanger.java:32)	at com.firebase.ui.auth.ui.email.SignInActivity.onCreate(SignInActivity.java:74)	at android.app.Activity.performCreate(Activity.java:5975)	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2269)