问题描述
在Android Studio 3.0中，一旦我们创建了项目，就会在res目录中自动创建一个名为mipmap-anydpi-v26的文件夹.它实际上是做什么的?我们为什么需要它?我们将如何将其用于开发目的?
In Android Studio 3.0, once we create a project, a folder named mipmap-anydpi-v26 is automatically created in the res directory. What actually does it do? Why do we need it? How will we utilize it for development purposes?
此外，在项目设置后，将在此文件夹中自动创建两个XML文件.为什么这些XML文件驻留在mipmap文件夹中?我认为我们应该将所有XML文件都保留在可绘制的文件夹中，而不要放在mipmap中.
Also, there are two XML files automatically created in this folder after project setup. Why do these XML files reside in a mipmap folder? I thought we should keep all XML files in a drawable folder instead of mipmap.
推荐答案
Android Studio 3创建一个自适应图标，仅在SDK 26及更高版本中可用.启动器图标应放在mipmap文件夹中.
Android Studio 3 creates an adaptive icon for your app which is only available in SDK 26 and up. Launcher icons should be put into the mipmap folders.
如果您查看清单，则可以看到它引用了ic_launcher
If you look at your manifest, you can see that it references ic_launcher
android:icon="@mipmap/ic_launcher"
如果您在mipmap文件夹中查找，则会看到正常的5个不同的启动器图标，这些图标将用于低于SDK 26的任何东西.对于SDK 26及更高版本，它将使用anydpi-v26文件夹中的XML文件来使用自适应图标.
If you look in your mipmap folder, you see your normal 5 different launcher icons which will be used for anything lower than SDK 26. For SDK 26 and up, it uses the XML files from the anydpi-v26 folder to make use of adaptive icon.
<?xml version="1.0" encoding="utf-8"?>
<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
<background android:drawable="@drawable/ic_launcher_background"/>
<foreground android:drawable="@mipmap/ic_launcher_foreground"/>
</adaptive-icon>
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