January 2023
Intermediate to advanced
288 pages
6h 6m
Chinese
Content preview from 移动端AI与ML应用开发：基于iOS和Android
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ML Kit
简介
|
41
3.1.4
第
4
步：将图像添加为资产
默认情况下，Android Studio 不会为你创建资产文件夹，因此你必须自己手动创建一个
以加载图像。最简单的方法是在项目的文件结构上创建。找到你的代码所在的文件夹，
并在
app/src/main
文件夹中创建一个名为
assets
的目录。然后，Android Studio 会将其
识别为你的资产目录。将一些图片复制到此（或使用我的 GitHub 中的图片），就可以使
用它们了。
完成并正确配置后，Android Studio 会将文件夹识别为资产文件夹，你能够浏览它。具
体情况如图 3-7 所示。
图
3-7
：设置你的资产
你现在已准备好开始编码，所以让我们从使用默认图片设置用户界面开始。
3.1.5
第
5
步：使用默认图片加载
UI
在
MainActivity.kt
文件中，你应该会看到一个名为
onCreate
的函数。其在创建活动时被
调用。这里在底部的
setContentView
行下添加以下代码：
val img: ImageView = findViewById(R.id.imageFace)
// assets folder image file name with extension
val fileName = "face-test.jpg"
// get bitmap from assets folder
val bitmap: Bitmap? = assetsToBitmap(fileName)
bitmap?.apply{ ...
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