DessertClicker

Solution code for Android Kotlin Fundamentals Codelab 4.1: Lifecycles and logging.

您将使用一款名为 DessertClicker 的初始应用。在此应用中，每当用户点按屏幕上的甜点时，该应用就会为用户“购买”相应甜点。应用会在布局中更新已购甜点的数量值，以及用户消费的总金额。

Introduction

DessertClicker is a game about making desserts. Press the button, make a dessert, earn the big bucks.

You use this app in the course to explore the Android lifecycle and log messages to the Android console (Logcat).

Pre-requisites

You need to know:

• How to open, build, and run apps with Android Studio.
• What an activity is, and how to create one in your app.
• What the activity's onCreate() method does, and the kind of operations that are performed in that method.
• How to create layouts in your activity, and how to update a layout in runtime.

Getting Started

1. Download and run the app.

import Dependencies

```
定义版本号
ext {
    navigationVersion = "2.3.0"
}
引入依赖'androidx.navigation.safeargs'
dependencies{
    implementation "androidx.navigation:navigation-fragment-ktx:$navigationVersion"
    implementation "androidx.navigation:navigation-ui-ktx:$navigationVersion"
}
运行时报错
Duplicate class androidx.lifecycle.ViewModelLazy found in modules 
lifecycle-viewmodel-2.4.0-runtime (androidx.lifecycle:lifecycle-viewmodel:2.4.0) and
lifecycle-viewmodel-ktx-2.2.0-runtime (androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0)
```
尝试以下方法来解决问题：

1.执行以下命令获取项目的依赖关系树：`./gradlew app:dependencies`
  -出现了关系树，但我看不明白，尝试删掉相冲突的依赖但仍没有解决问题最后选择放弃

2.检查项目中的其他依赖项，并确保它们与所需的 androidx.lifecycle 版本兼容。
 可以尝试更新这些依赖项的版本，以使用与 androidx.lifecycle:lifecycle-viewmodel:2.4.0 兼容的版本。
  -我将navigationVersion提升到2.5.0就可以运行成功
  

1.创建界面状态类

2.创建ViewModel

3.将应用逻辑和数据转移到ViewModel

4.调用ViewModel

Readme基本语法和书写格式

Text that is a quote

Use git status to list all new or modified files that haven't yet been committed.

Some basic Git commands are:

git status
git add
git commit

The background color is #ffffff for light mode and #000000 for dark mode.

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• George Washington

• John Adams

• Thomas Jefferson

1. James Madison

2. James Monroe

3. John Quincy Adams

4. First list item

   • First nested list item
     • Second nested list item

• #739
• https://github.com/octo-org/octo-repo/issues/740
• Add delight to the experience when all tasks are complete 🎉

@octocat 👍 This PR looks great - it's ready to merge!

Here is a simple footnote¹.

A footnote can also have multiple lines².

Let's rename *our-new-project* to *our-old-project*.

Command	Description
git status	List all new or modified files
git diff	Show file differences that haven't been staged

Command	Description
git status	List all new or modified files
git diff	Show file differences that haven't been staged

Left-aligned	Center-aligned	Right-aligned
git status	git status	git status
git diff	git diff	git diff

Name	Character
Backtick	`
Pipe	|

CLICK ME

asdasd

We can hide anything, even code!

   puts "Hello World"

```
Look! You can see my backticks.
```

require 'redcarpet'
markdown = Redcarpet.new("Hello World!")
puts markdown.to_html

Here is a simple flow chart:

graph TD;
    A-->B;
    A-->C;
    B-->D;
    C-->D;

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This sentence uses $ delimiters to show math inline: $\sqrt{3x-1}+(1+x)^2$

$$\left( \sum_{k=1}^n a_k b_k \right)^2$$

https://github.com/github/docs/labels/enhancement

Footnotes

1. My reference. ↩

2. To add line breaks within a footnote, prefix new lines with 2 spaces. This is a second line. ↩