AAPT: error: resource mipmap/bg (aka com.example.myapplication:mipmap/bg) not found.

这个错误通常是因为在你的项目中缺少了 `mipmap/bg` 这个资源文件。你需要检查你的项目中是否有该资源文件，并且确认文件名是否正确。如果文件确实不存在，你需要在项目中添加该资源文件。如果文件名正确且文件存在，那么可能是由于构建过程中出现了其他问题导致的错误。你可以尝试清除项目并重新构建来解决该问题。

相关问题

AAPT: error: resource string/BmiTitle (aka com.example.ererapplication:string/BmiTitle) not found.

这个错误提示显示你的应用程序在编译过程中无法找到名为BmiTitle的字符串资源文件。请确保在你的strings.xml文件中已经定义了该字符串资源，例如：

<string name="BmiTitle">BMI计算器</string>

另外，请检查资源名称是否正确拼写以及所在路径是否正确。如果以上步骤都正确，请尝试Clean和Rebuild你的应用程序，以确保所有资源都被正确地编译和打包。

AAPT: error: resource array/operators (aka com.example.calculator:array/operators) not found.

This error message indicates that the Android Asset Packaging Tool (AAPT) was unable to find the resource array/operators in the specified location. This could be due to a variety of reasons, such as a typo in the resource name or a missing resource file.

To resolve this error, you should double-check that the resource array/operators is defined in the correct XML file and that the file is located in the appropriate directory within your project. You should also ensure that the resource name is spelled correctly in your code. If the issue persists, try cleaning and rebuilding your project.