### 计算机代写|app代写安卓代写,Android代写|Running a Compose app

statistics-lab™ 为您的留学生涯保驾护航 在代写安卓Android方面已经树立了自己的口碑, 保证靠谱, 高质且原创的统计Statistics代写服务。我们的专家在代写安卓Android代写方面经验极为丰富，各种代写安卓Android相关的作业也就用不着说。

• Statistical Inference 统计推断
• Statistical Computing 统计计算
• (Generalized) Linear Models 广义线性模型
• Statistical Machine Learning 统计机器学习
• Longitudinal Data Analysis 纵向数据分析
• Foundations of Data Science 数据科学基础

## 计算机代写|app代写安卓代写,Android代写|Deploying a composable function

If you want to see how a composable function looks and feels on the Android Emulator or a real device, you have two options:

• Deploying a composable function
• Running the app
The first option is useful if you want to focus on a particular composable rather than the whole app. Also, the time needed to deploy a composable may be significantly shorter than deploying a complete app (depending on the app size). So, let’s start with this one.
• To deploy a composable function to a real device or the Android Emulator, click on the Deploy Preview button, which is a small image in the upper-right corner of a preview (Figure 1.6):

You can modify or delete Compose preview configurations in the Run/Debug Configurations dialog. To access them, open the Compose Preview node. Then you can, for example, change its name or deny parallel runs by unchecking Allow parallel run.
The goal of this chapter is to deploy and run your first Compose app on a real device or the Android Emulator. You are almost there; in the next section, I will show you how to embed composable functions in an activity, which is a prerequisite. You will finally be running the app in the Pressing the play button section.

## 计算机代写|app代写安卓代写,Android代写|Using composable functions in activities

Activities have been one of the basic building blocks of Android apps since the first platform version. Practically every app has at least one activity. They are configured in the manifest file. To launch an activity from the home screen, the corresponding entry looks like this:
$\quad<$ action android: name=”android.intent.action.MAIN” /><category

android: name $=$ “android. intent. category. LAUNCHER” />$</$ activity $\rangle$

This is still true for Compose apps. An activity that wishes to show composable functions is set up just like one that inflates a traditional layout file. But what does its source code look like? The main activity of the Hello app is called MainActivity, shown in the next code block:
class MainActivity : ComponentActivity() {
override fun onCreate (savedinstancestate: Bundle?) {
super. onCreate (savedinstancestate)
setContent {
Hello()
}
}
}
As you can see, it is very short. The UI (the Hello () composable function) is displayed by invoking a function called setContent, which is an extension function to androidx. activity. ComponentActivity and belongs to the androidx. activity. compose package.

To render composables, your activity must extend either ComponentActivity or another class that has ComponentActivity as its direct or indirect ancestor. This is the case for androidx. fragment . app. FragmentActivity and androidx. appcompat. app. AppCompatActivity.

This is an important difference; while Compose apps invoke setContent (), Viewbased apps call setContentView () and pass either the ID of a layout (R. layout. activity_main) or the root view itself (which is usually obtained through some binding mechanism). Let’s see how the older mechanism works. The following code snippet is taken from one of my open source apps (you can find it on GitHub at https://github. com/MATHEMA-GmbH/TKWeek but it won’t be discussed any further in this book):
class TKWeekActivity : TKWeekBaseActivity() {
private var backing: TkweekBinding? = null
private val binding get () = backing!!

## 计算机代写|app代写安卓代写,Android代写|Looking under the hood

Jetpack Compose heavily relies on Kotlin. This means that your app project must be configured to use Kotlin. It does not imply, though, that you cannot use Java at all. In fact, you can easily mix Kotlin and Java in your project, as long as your composable functions are written in Kotlin. You can also combine traditional views and composables. I will be discussing this topic in Chapter 9, Exploring Interoperability APIs.

First, make sure to configure the Android Gradle plugin that corresponds to your version of Android Studio in the project-level build.gradle file:
buildscript 1
dependencies 1
classpath “com. android.tools.build:gradle: $7.0 .4$ “
plugin: 1.5.31″
}
}
The following code snippets belong in the module-level build.gradle file:
Next, please make sure that your app’s minimum API level is set to 21 or higher and that Jetpack Compose is enabled. The following code snippet also sets the version for the Kotlin compiler plugin:
android {
defaultConfig {
minsdkVersion 21
}
buildFeatures {
compose true
}
compileoptions {
\begin{tabular}{l}
android { \
defaultConfig { \
minsdkVersion 21 \
} \
buildFeatures { \
compose true \
} \
compileoptions { \
sourceCompatibility JavaVersion.VERSION_11 \
targetCompatibility JavaVersion.VERSION_11 \
\hline } \
kotlinoptions { \
jvmTarget = “11”
\end{tabular}
sourceCompatibility JavaVersion.VERSION_11
targetCompatibility JavaVersion.VERSION_11
}
kotlinOptions {
jvmTarget $=$ “11”

## 计算机代写|app代写安卓代写,Android代写|Deploying a composable function

• 部署可组合函数
• 运行应用程序
如果您想专注于特定的可组合而不是整个应用程序，第一个选项很有用。此外，部署可组合组件所需的时间可能比部署完整的应用程序（取决于应用程序的大小）要短得多。所以，让我们从这个开始。
• 要将可组合功能部署到真实设备或 Android 模拟器，请单击“部署预览”按钮，这是预览右上角的一个小图像（图 1.6）：

## 计算机代写|app代写安卓代写,Android代写|Using composable functions in activities

<动作 android: name=”android.intent.action.MAIN” /><category

class MainActivity : ComponentActivity() {
override fun onCreate (savedinstancestate: Bundle?) {
super. onCreate (savedinstancestate)
setContent {
Hello()
}
}
}

class TKWeekActivity : TKWeekBaseActivity() {

private val binding get () = backing!!

## 计算机代写|app代写安卓代写,Android代写|Looking under the hood

Jetpack Compose 严重依赖 Kotlin。这意味着您的应用项目必须配置为使用 Kotlin。但是，这并不意味着您根本不能使用 Java。事实上，您可以在项目中轻松混合 Kotlin 和 Java，只要您的可组合函数是用 Kotlin 编写的。您还可以结合传统视图和可组合项。我将在第 9 章“探索互操作性 API”中讨论这个主题。

buildscript 1
dependencies 1

plugin: 1.5.31″
}
}

android {
defaultConfig {
minsdkVersion 21
}
buildFeatures {
compose true
}
compileoptions {
\begin{tabular}{l}
android { \
defaultConfig { \
minsdkVersion 21 \
} \
buildFeatures { \

} \
compileoptions { \
sourceCompatibility JavaVersion.VERSION_11 \
targetCompatibility JavaVersion.VERSION_11 \
\hline } \
kotlinoptions { \
jvmTarget = “11”
\end{tabular}
sourceCompatibility JavaVersion.VERSION_11
targetCompatibility JavaVersion.VERSION_11
}
kotlinOptions {
jvmTarget= “11”

## 有限元方法代写

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## MATLAB代写

MATLAB 是一种用于技术计算的高性能语言。它将计算、可视化和编程集成在一个易于使用的环境中，其中问题和解决方案以熟悉的数学符号表示。典型用途包括：数学和计算算法开发建模、仿真和原型制作数据分析、探索和可视化科学和工程图形应用程序开发，包括图形用户界面构建MATLAB 是一个交互式系统，其基本数据元素是一个不需要维度的数组。这使您可以解决许多技术计算问题，尤其是那些具有矩阵和向量公式的问题，而只需用 C 或 Fortran 等标量非交互式语言编写程序所需的时间的一小部分。MATLAB 名称代表矩阵实验室。MATLAB 最初的编写目的是提供对由 LINPACK 和 EISPACK 项目开发的矩阵软件的轻松访问，这两个项目共同代表了矩阵计算软件的最新技术。MATLAB 经过多年的发展，得到了许多用户的投入。在大学环境中，它是数学、工程和科学入门和高级课程的标准教学工具。在工业领域，MATLAB 是高效研究、开发和分析的首选工具。MATLAB 具有一系列称为工具箱的特定于应用程序的解决方案。对于大多数 MATLAB 用户来说非常重要，工具箱允许您学习应用专业技术。工具箱是 MATLAB 函数（M 文件）的综合集合，可扩展 MATLAB 环境以解决特定类别的问题。可用工具箱的领域包括信号处理、控制系统、神经网络、模糊逻辑、小波、仿真等。