Android id naming convention: lower case with underscore vs. camel case

Question

I\'m currently programming an application for the Android. Now what I found out is that you cannot place resource objects, say, an image in the drawable folder and name it l

Answer 1

android:id="@+id/frag_account_button"
frag_account_button = ((ListView)view.findViewById(R.id.frag_account_button));

android:id="@+id/fragAccountButton"
fragAccountButton = ((ListView)view.findViewById(R.id.fragAccountButton));

First of all, there is no certain standard to define which one is more Proper but I have my own idea about that. My idea is reasonable to keeping XML id and java variable in the exact same name with the camel-case convention.

1. It is easy to reach the variable by searching for the project both XML and java side.

2. butterKnife library definition

   @BindView(R.id.infoTextView) TextViewFont infoTextView;

It is more proper to keep in this way.