Fixed bug for older devices

Hoping that the viewer crashing bug is fixed
Version 2.11

app/src/main/java/xyz/quaver/pupil/adapters/ReaderAdapter.kt

@@ -1,6 +1,8 @@
 package xyz.quaver.pupil.adapters
 
+import android.graphics.Bitmap
 import android.graphics.BitmapFactory
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -10,6 +12,8 @@ import xyz.quaver.pupil.R
 
 class ReaderAdapter(private val images: List<String>) : RecyclerView.Adapter<ReaderAdapter.ViewHolder>() {
 
+    var isFullScreen = false
+
     class ViewHolder(val view: View) : RecyclerView.ViewHolder(view)
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
@@ -21,19 +25,49 @@ class ReaderAdapter(private val images: List<String>) : RecyclerView.Adapter<Rea
     }
 
     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+
+        fun calculateInSampleSize(options: BitmapFactory.Options, reqWidth: Int, reqHeight: Int): Int {
+            // Raw height and width of image
+            val (height: Int, width: Int) = options.run { outHeight to outWidth }
+            var inSampleSize = 1
+
+            if (height > reqHeight || width > reqWidth) {
+
+                val halfHeight: Int = height / 2
+                val halfWidth: Int = width / 2
+
+                // Calculate the largest inSampleSize value that is a power of 2 and keeps both
+                // height and width larger than the requested height and width.
+                while (halfHeight / inSampleSize >= reqHeight && halfWidth / inSampleSize >= reqWidth) {
+                    inSampleSize *= 2
+                }
+            }
+
+            return inSampleSize
+        }
+
         with(holder.view as ImageView) {
             val options = BitmapFactory.Options()
 
             options.inJustDecodeBounds = true
             BitmapFactory.decodeFile(images[position], options)
 
-            options.inSampleSize = options.outWidth /
-                    context.resources.displayMetrics.widthPixels
+            val (reqWidth, reqHeight) = context.resources.displayMetrics.let {
+                Pair(it.widthPixels, it.heightPixels)
+            }
+
+            options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight)
+
+            options.inPreferredConfig = Bitmap.Config.RGB_565
 
             options.inJustDecodeBounds = false
 
             val image = BitmapFactory.decodeFile(images[position], options)
 
+            Log.d("Pupil", image.byteCount.toString())
+            Log.d("Pupil", "${image.width}x${image.height}")
+            Log.d("Pupil", "deviceWidth ${context.resources.displayMetrics.widthPixels}")
+
             setImageBitmap(image)
         }
     }