Download Android Studio Essentials by Belen Cruz Zapata PDF

By Belen Cruz Zapata

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Sample text

The opposite command is Ctrl + Shift + W. Ctrl + / This comments each line of the selected code. To block comments, use Ctrl + Shift + /. Ctrl + Alt + I This indents the selected code. This is useful when cleaning up a block of code or method after you finish writing. Ctrl + Alt + O This optimizes the imports, removing the unused imports and reordering the rest of them. Shift + Ctrl + Arrows This moves the selected code a line above or below. Alt + Arrows This switches between the opened tabs of the editor.

These templates can insert code to iterate collections, arrays, lists, and so on; code to print formatted strings; code to throw exceptions; or code to add static and final variables. The left edge of the dialog shows the prefix for each template. If you type the prefix in the editor and press the Tab key, the code template is added automatically. Type inn at the end of the onCreate method of our main activity and press Tab. A conditional block will appear. In this new block, type soutv and press Tab again.

Then we will go through the most important folders in our project—build, gen, and libs—and the folders under src/main, and you will learn how to change the project settings. These are the topics we'll be covering in this chapter: • The navigation panel • The project structure • Changing project properties Navigating a Project The project navigation panel Initially, no project or file is displayed in the main view of Android Studio, as you can see in the next screenshot. As Android Studio suggests, press Alt + 1 to open the project view.

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