我的运行出了问题，提示Unfortunately,XXX has stopped.

以下是Logcat报错的信息：求能够快速定位错误并解决。

Unable to start activity ComponentInfo{com.hyb.musicapplication/com.hyb.musicapplication.MainActivity}: android.view.InflateException: Binary XML file line #35: Error inflating class <unknown>

Caused by: android.content.res.Resources$NotFoundException: File res/mipmap-hdpi-v4/back.png from drawable resource ID #0x7f0a0000: .xml extension required