Android Studio Development Skills Collection 1

About Android Studio's key mapping

Android Studio provides different keymaps (i.e. the mapping between shortcut keys and their corresponding operations). You can view the currently used keymap in the " Settings->Keymap " menu.

Highlight all identical variables

OS X: Command + Shift + F7
Windows Or Linux: Ctrl + Shift + F7

This shortcut will highlight all occurrences of the selected characters in the current file. Of course, this shortcut is not just some simple pattern matching, it also understands the scope of the current variable and only highlights the relevant characters.

After highlighting, you can use the shortcuts defined at " Edit → Find → Find Next/Previous " to select the highlighted characters you want to operate on.

Related Tips:

• Highlighting a "return" or "throw" in a method will also highlight all exits of that method.
• Highlighting the "extends" or "implements" definition part of a Java class will also highlight the corresponding overridden or implemented methods.
• Highlighting an import statement will also highlight where it is used.
• Esc can cancel the highlight.

Jumping between methods and inner classes

This shortcut allows you to easily jump to the method or class in the current file.

If you are currently in a method, this shortcut (up) will allow your cursor to jump to the method name. This is very helpful when you are refactoring code or finding where this code is used.

Class file structure pop-up window

This shortcut key can help you display the method structure of the current class file. You can use this shortcut key to pop up a pop-up window and search for the method name you want.

Related Tips:

• You can use camelCase characters to filter the candidate method list. For example, enter "oCr" to find the "onCreate" method.
• You can choose whether to show anonymous classes. If you check "Yes", you can easily find the OnClick method in OnClickListener.

Method call level pop-up window

This shortcut helps you show how the method is called.

Defining Quick Finds

If you want to immediately know the source of a class or method without losing your current coding environment, you can try this shortcut.

Collapse or expand code blocks

See the picture on the right for the specific effect.

Related Tips:

• You can customize your code folding scope in " Editor → Code Folding ".

Bookmark to save your code site

Default Tags

Labels with letters or numbers

Press this shortcut key to label the line where your cursor is currently located, and provide a letter or number label. If you choose a number label, you can jump directly to the corresponding position by pressing ctrl+the corresponding number.

Display Tags

Find Android Studio's menu options

You can search for any menu option by typing the menu name, which is useful for operations that are rarely used.

Related Tips:

• If there is a shortcut for this option, the shortcut will be displayed next to the list.

Line-of-code movement

Use this shortcut key to move the code in a row, either up or down. The effect is as shown below.

Deleting a row

Delete the current line or selected code.