Removed activity_opening.xml since is a simple layout there's no necessary to keep a whole layout file for it, i replaced it with a LinearLayout object created programmatically.
Removed dialog_clear_pp.xml, fragment_preview_background_brightness.xml, frg_test.xml, main.xml that are not used.
res/drawable/:
Removed icon.png and its resource variants that are not used.
Removed ic_new_icon.png and its resource variants that are not used.
Removed notify_icon.png and its resource variants that are not used.
src/:
Removed TestFragment.java because is not used (Is related to the removed file frg_test.xml).
Replaced activity_opening.xml usage in PermissionActivity class with a LinearLayout object.
res/layout/:
activity_opening.xmlsince is a simple layout there's no necessary to keep a whole layout file for it, i replaced it with a LinearLayout object created programmatically.dialog_clear_pp.xml,fragment_preview_background_brightness.xml,frg_test.xml,main.xmlthat are not used.res/drawable/:
icon.pngand its resource variants that are not used.ic_new_icon.pngand its resource variants that are not used.notify_icon.pngand its resource variants that are not used.src/:
TestFragment.javabecause is not used (Is related to the removed filefrg_test.xml).activity_opening.xmlusage inPermissionActivityclass with a LinearLayout object._