Android Studio provides different keymaps. You can see list of all keymap in File - Settings - Keymap. Following is some useful shortcuts for Linux or Windows systems.
Moving around
Ctrl + n - opening class/file/symbol Ctrl + shift + n - open fileAlt + shift + n - open symbol/method/fieldCtrl + e - recently opened filesCtrl + Shift + e - recently edited filesCtrl + Shift + Backspace - last edit locationCtrl + b - goto declaration of method, variableShift key twice - search everywhere dialogBookmarks
F11 - toggle bookmarkShift + F11 - show bookmarksSelection
Ctrl + w / Ctrl + Shift + w - expand/shrink celectionCtrl + Alt + t - surround a block of code in some structureInfo
Ctrl + P (on method) - show existing method’s paramsFull list of keymaps you can see here.