Android resource linking failed

Information:Gradle tasks [:app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:createMockableJar, :vrlib:generateDebugSources, :vrlib:generateDebugAndroidTestSources, :vrlib:createMockableJar]
Information:BUILD FAILED in 4s
Error:FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:processDebugResources'.
> Android resource linking failed
  Output:  E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\incremental\mergeDebugResources\merged.dir\values-v28\values-v28.xml:7: error: resource android:attr/dialogCornerRadius not found.
  E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\incremental\mergeDebugResources\merged.dir\values-v28\values-v28.xml:11: error: resource android:attr/dialogCornerRadius not found.
  E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\incremental\mergeDebugResources\merged.dir\values\values.xml:302: error: resource android:attr/fontVariationSettings not found.
  E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\incremental\mergeDebugResources\merged.dir\values\values.xml:302: error: resource android:attr/ttcIndex not found.
  error: failed linking references.
  
  Command: C:\Users\qingchao.cui\.gradle\caches\transforms-1\files-1.1\aapt2-3.2.1-4818971-windows.jar\a8cf5af3191ebd7877f0715c35424c96\aapt2-3.2.1-4818971-windows\aapt2.exe link -I\
          C:\Users\qingchao.cui\AppData\Local\Android\Sdk\platforms\android-27\android.jar\
          --manifest\
          E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\merged_manifests\debug\processDebugManifest\merged\AndroidManifest.xml\
          -o\
          E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\processed_res\debug\processDebugResources\out\resources-debug.ap_\
          -R\
          @E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\incremental\processDebugResources\resources-list-for-resources-debug.ap_.txt\
          --auto-add-overlay\
          --java\
          E:\work\apps\demos\MD360Player4Android-master\app\build\generated\not_namespaced_r_class_sources\debug\processDebugResources\r\
          --custom-package\
          com.asha.md360player4android\
          -0\
          apk\
          --output-text-symbols\
          E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\symbols\debug\R.txt\
          --no-version-vectors
  Daemon:  AAPT2 aapt2-3.2.1-4818971-windows Daemon #0
  Output:  C:\Users\qingchao.cui\.gradle\caches\transforms-1\files-1.1\appcompat-1.0.0-alpha1.aar\bd513edbb96023da4cddcf50c9d78c00\res\values-v28\values-v28.xml:9:5-12:13: AAPT: error: resource android:attr/dialogCornerRadius not found.
      
  E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\incremental\mergeDebugResources\merged.dir\values-v28\values-v28.xml:11: AAPT: error: resource android:attr/dialogCornerRadius not found.
      
  C:\Users\qingchao.cui\.gradle\caches\transforms-1\files-1.1\exoplayer-ui-2.8.1.aar\7ea101374e466be9d1c19677085fc539\res\values\values.xml:30:5-266: AAPT: error: resource android:attr/fontVariationSettings not found.
      
  C:\Users\qingchao.cui\.gradle\caches\transforms-1\files-1.1\exoplayer-ui-2.8.1.aar\7ea101374e466be9d1c19677085fc539\res\values\values.xml:30:5-266: AAPT: error: resource android:attr/ttcIndex not found.
      
  error: failed linking references.
  Command: C:\Users\qingchao.cui\.gradle\caches\transforms-1\files-1.1\aapt2-3.2.1-4818971-windows.jar\a8cf5af3191ebd7877f0715c35424c96\aapt2-3.2.1-4818971-windows\aapt2.exe link -I\
          C:\Users\qingchao.cui\AppData\Local\Android\Sdk\platforms\android-27\android.jar\
          --manifest\
          E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\merged_manifests\debug\processDebugManifest\merged\AndroidManifest.xml\
          -o\
          E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\processed_res\debug\processDebugResources\out\resources-debug.ap_\
          -R\
          @E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\incremental\processDebugResources\resources-list-for-resources-debug.ap_.txt\
          --auto-add-overlay\
          --java\
          E:\work\apps\demos\MD360Player4Android-master\app\build\generated\not_namespaced_r_class_sources\debug\processDebugResources\r\
          --custom-package\
          com.asha.md360player4android\
          -0\
          apk\
          --output-text-symbols\
          E:\work\apps\demos\MD360Player4Android-master\app\build\intermediates\symbols\debug\R.txt\
          --no-version-vectors
  Daemon:  AAPT2 aapt2-3.2.1-4818971-windows Daemon #0

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

解决方法：

修改内容为：
compileSdkVersion 28
targetSdkVersion 28