Fix background colors for unit types

app/src/main/kotlin/com/simplemobiletools/calculator/adapters/UnitTypesAdapter.kt

@@ -1,14 +1,17 @@
 package com.simplemobiletools.calculator.adapters
 
+import android.graphics.drawable.LayerDrawable
+import android.graphics.drawable.RippleDrawable
 import android.view.View
 import android.view.ViewGroup
+import androidx.core.content.res.ResourcesCompat
 import androidx.recyclerview.widget.RecyclerView
+import com.simplemobiletools.calculator.R
 import com.simplemobiletools.calculator.activities.SimpleActivity
 import com.simplemobiletools.calculator.databinding.ItemUnitTypeBinding
+import com.simplemobiletools.calculator.extensions.getStrokeColor
 import com.simplemobiletools.calculator.helpers.converters.Converter
-import com.simplemobiletools.commons.extensions.applyColorFilter
+import com.simplemobiletools.commons.extensions.*
-import com.simplemobiletools.commons.extensions.getProperPrimaryColor
-import com.simplemobiletools.commons.extensions.getProperTextColor
 
 class UnitTypesAdapter (val activity: SimpleActivity, val items: List<Converter>, val itemClick: (id: Int) -> Unit) : RecyclerView.Adapter<UnitTypesAdapter.ViewHolder>() {
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder =
@@ -28,6 +31,12 @@ class UnitTypesAdapter (val activity: SimpleActivity, val items: List<Converter>
                 binding.unitImage.setImageResource(item.imageResId)
                 binding.unitLabel.setText(item.nameResId)
 
+                val rippleBg = ResourcesCompat.getDrawable(resources, R.drawable.unit_type_background, context.theme) as RippleDrawable
+                val layerDrawable = rippleBg.findDrawableByLayerId(R.id.background_holder) as LayerDrawable
+                layerDrawable.findDrawableByLayerId(R.id.background_stroke).applyColorFilter(context.getStrokeColor())
+                layerDrawable.findDrawableByLayerId(R.id.background_shape).applyColorFilter(context.getProperBackgroundColor().darkenColor(2))
+                binding.unitBackground.background = rippleBg
+
                 binding.unitLabel.setTextColor(activity.getProperTextColor())
                 binding.unitImage.applyColorFilter(activity.getProperPrimaryColor())
 

app/src/main/kotlin/com/simplemobiletools/calculator/extensions/Context.kt

@@ -4,6 +4,7 @@ import android.appwidget.AppWidgetManager
 import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
+import android.graphics.Color
 import android.net.Uri
 import android.os.Build
 import android.provider.Settings
@@ -15,6 +16,9 @@ import com.simplemobiletools.calculator.databases.CalculatorDatabase
 import com.simplemobiletools.calculator.helpers.Config
 import com.simplemobiletools.calculator.helpers.MyWidgetProvider
 import com.simplemobiletools.calculator.interfaces.CalculatorDao
+import com.simplemobiletools.commons.extensions.getProperBackgroundColor
+import com.simplemobiletools.commons.extensions.isUsingSystemDarkTheme
+import com.simplemobiletools.commons.extensions.lightenColor
 import com.simplemobiletools.commons.extensions.showErrorToast
 
 val Context.config: Config get() = Config.newInstance(applicationContext)
@@ -64,3 +68,20 @@ fun Context.launchChangeAppLanguageIntent() {
         }
     }
 }
+
+fun Context.getStrokeColor(): Int {
+    return if (config.isUsingSystemTheme) {
+        if (isUsingSystemDarkTheme()) {
+            resources.getColor(com.simplemobiletools.commons.R.color.md_grey_800, theme)
+        } else {
+            resources.getColor(com.simplemobiletools.commons.R.color.md_grey_400, theme)
+        }
+    } else {
+        val lighterColor = getProperBackgroundColor().lightenColor()
+        if (lighterColor == Color.WHITE || lighterColor == Color.BLACK) {
+            resources.getColor(com.simplemobiletools.commons.R.color.divider_grey, theme)
+        } else {
+            lighterColor
+        }
+    }
+}

app/src/main/res/drawable/unit_type_background.xml

@@ -1,15 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
 <ripple xmlns:android="http://schemas.android.com/apk/res/android"
     android:color="#22ffffff">
-    <item android:id="@+id/clipboard_background_holder">
+    <item android:id="@+id/background_holder">
         <layer-list>
-            <item android:id="@+id/clipboard_background_shape">
+            <item android:id="@+id/background_shape">
                 <shape android:shape="rectangle">
                     <corners android:radius="@dimen/medium_margin" />
                     <solid android:color="@color/md_grey_800" />
                 </shape>
             </item>
-            <item android:id="@+id/clipboard_background_stroke">
+            <item android:id="@+id/background_stroke">
                 <shape android:shape="rectangle">
                     <solid android:color="@android:color/transparent" />
                     <stroke

app/src/main/res/layout/item_unit_type.xml

@@ -2,6 +2,7 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="@dimen/unit_type_size"
     android:layout_height="@dimen/unit_type_size"
+    android:id="@+id/unit_background"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_margin="@dimen/small_margin"
     android:background="@drawable/unit_type_background"