[fix] Fix #2 for PreferenceFragment (#6)

Author: lightsummer233

app/src/main/java/com/skyd/anivu/ui/component/preference/MaterialPreferenceFragmentCompat.kt

@@ -1,10 +1,13 @@
 package com.skyd.anivu.ui.component.preference
 
+import android.os.Bundle
+import android.view.View
 import androidx.preference.EditTextPreference
 import androidx.preference.ListPreference
 import androidx.preference.ListPreferenceDialogFragmentCompat
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
+import com.google.android.material.color.MaterialColors
 import com.skyd.anivu.ui.component.dialog.InputDialogBuilder
 
 abstract class MaterialPreferenceFragmentCompat : PreferenceFragmentCompat() {
@@ -39,4 +42,11 @@ abstract class MaterialPreferenceFragmentCompat : PreferenceFragmentCompat() {
             }
         }
     }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        // Fix https://github.com/material-components/material-components-android/issues/1984#issuecomment-1089710991
+        view.setBackgroundColor(MaterialColors.getColor(view, android.R.attr.colorBackground))
+    }
 }