feat: 优化代码

app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt

@@ -1,6 +1,7 @@
 package io.legado.app.ui.config
 
 import android.content.SharedPreferences
+import android.os.Build
 import android.os.Bundle
 import android.view.View
 import androidx.preference.Preference
@@ -16,7 +17,6 @@ import io.legado.app.lib.dialogs.noButton
 import io.legado.app.lib.dialogs.yesButton
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.ColorUtils
-import io.legado.app.lib.theme.elevation
 import io.legado.app.ui.widget.number.NumberPickerDialog
 import io.legado.app.utils.*
 
@@ -27,6 +27,9 @@ class ThemeConfigFragment : PreferenceFragmentCompat(), SharedPreferences.OnShar
 
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
         addPreferencesFromResource(R.xml.pref_config_theme)
+        if (Build.VERSION.SDK_INT < 26) {
+            preferenceScreen.removePreference(findPreference(PreferKey.launcherIcon))
+        }
         upPreferenceSummary("barElevation", AppConfig.elevation.toString())
     }