Getting started with Android Engineers (1)-this week's entrance, time-consuming, light-spraying, and android engineers

Getting started with Android Engineers (1)-this week's entrance, time-consuming, light-spraying, and android engineers

Squeeze time, first.

I. Environment Construction

.

Ii. Project Structure

In studio, project = Module;

Res: all resources applied --The size of the generated APK is basically determined.;

Java: java source program;

Manifests: inventory fileFor all configurations, the first access point for each execution;

-- Res

Drawable: Stores image resources;

Layout: layout;

Menu: exclusive menu layout;

Mipmap: Mipmaps can be used as early as Android2.2 +, but it is not strongly recommended until google 4.3. Placing images on mipmaps can speed up image rendering, improve image quality, and reduce GPU pressure;

Values: stores strings, themes, colors, and styles;

3. Enter and display text on the Interface

3.1 control Overview

TextView: displays text box controls;

EditText: Enter the text box;

-- Common attributes

Android: id -- Control id;

Android: layout_width -- the width of the space;

~ Height;

~ Text -- text content;

~ TextSize -- text size;

~ TextColor;

~ Background;

There are two more EditText :~ Hint input prompt text; inputType input text type

3.2 Implementation

In main. xml of layout

<! -- Wrap_content: contains the actual text content match_parent: the current control is full of the parent class container fill_parent: Same as above, for earlier versions of sdk -->

<TextView android: id = "@ + id/textView1" android: layout_width = "wrap_content" android: layout_height = "match_parent" android: text = "name:" android: textSize = "28sp" android: textColor = "#000000"/> <EditText android: hint = "enter your name" android: id = "@ + id/editText1" android: layout_width = "match_parent" android: layout_height = "match_parent"/>