conventions.txt

I'll follow the coding guidelines described at https://github.com/ribot/android-guidelines/blob/master/project_and_code_guidelines.md

Naming conventions for variables and components

<ACTIVITY NAME>_activity.xml - for all activities
dialog_<DIALOG NAME>.xml - for all custom dialogs
row_<LIST_NAME>.xml - for custom row for listview
fragment_<FRAGMENT_NAME>.xml - for all fragments
Naming convention for component/widget in xml files:

All components for X activity must start with the activity name and components should have prefix or short name to describe type. For example, name for Main activity component should be like the following:

<activityname>_<type>_<name>
main_btn_login
main_et_username
main_et_password

Short name of major components:
Button - btn
Toolbar - tbar
Fragment - fr
EditText - et
TextView - tv
ProgressBar - pb
Checkbox - chk
RadioButton - rb
ToggleButton - tb
Spinner - spn
Menu - mnu
ListView - lv
GalleryView - gv
LinearLayout -ll
RelativeLayout - rl