Use AndroidX's LruCache.

Author: Isira-Seneviratne

build.gradle

@@ -20,7 +20,7 @@ buildscript {
     mockWebServer: "com.squareup.okhttp3:mockwebserver:${versions.okhttp}",
     pollexor: 'com.squareup:pollexor:3.0.0',
     androidxAnnotations: 'androidx.annotation:annotation:1.3.0',
-    androidxCore: 'androidx.core:core:1.6.0',
+    androidxCore: 'androidx.core:core-ktx:1.6.0',
     androidxCursorAdapter: 'androidx.cursoradapter:cursoradapter:1.0.0',
     androidxExifInterface: 'androidx.exifinterface:exifinterface:1.3.3',
     androidxFragment: 'androidx.fragment:fragment:1.4.0',

picasso/src/main/java/com/squareup/picasso3/PlatformLruCache.kt

@@ -16,18 +16,14 @@
 package com.squareup.picasso3
 
 import android.graphics.Bitmap
-import android.util.LruCache
+import androidx.core.util.lruCache
 
 /** A memory cache which uses a least-recently used eviction policy.  */
 internal class PlatformLruCache(maxByteCount: Int) {
   /** Create a cache with a given maximum size in bytes.  */
-  val cache =
-    object : LruCache<String, BitmapAndSize>(if (maxByteCount != 0) maxByteCount else 1) {
-      override fun sizeOf(
-        key: String,
-        value: BitmapAndSize
-      ): Int = value.byteCount
-    }
+  val cache = lruCache<String, BitmapAndSize>(
+    maxByteCount.coerceAtLeast(1), { _, value -> value.byteCount }
+  )
 
   operator fun get(key: String): Bitmap? = cache[key]?.bitmap