Fix issue #440: Incorrect display of total memory (Binary vs Decimal)

app/build.gradle.kts

@@ -146,4 +146,7 @@ dependencies {
     implementation(libs.autofittextview)
     implementation(libs.zip4j)
     detektPlugins(libs.compose.detekt)
+
+    // Unit testing
+    testImplementation("junit:junit:4.13.2")
 }

app/src/main/kotlin/org/fossify/filemanager/adapters/ItemsAdapter.kt

@@ -53,7 +53,7 @@ import org.fossify.commons.extensions.deleteFile
 import org.fossify.commons.extensions.deleteFileBg
 import org.fossify.commons.extensions.deleteFolderBg
 import org.fossify.commons.extensions.formatDate
-import org.fossify.commons.extensions.formatSize
+import org.fossify.filemanager.extensions.formatSize
 import org.fossify.commons.extensions.getAndroidSAFFileItems
 import org.fossify.commons.extensions.getAndroidSAFUri
 import org.fossify.commons.extensions.getColoredDrawableWithColor

app/src/main/kotlin/org/fossify/filemanager/extensions/Long.kt

@@ -0,0 +1,31 @@
+package org.fossify.filemanager.extensions
+
+import java.util.Locale
+
+/**
+ * Format bytes to human-readable size using binary (base 2) calculation
+ * This overrides the commons library's formatSize which uses decimal (base 10)
+ * 
+ * Uses standard binary units: B, KiB, MiB, GiB, TiB, PiB
+ * where 1 KiB = 1024 bytes (instead of 1000 in decimal)
+ */
+@Suppress("MagicNumber")
+fun Long.formatSize(): String {
+    if (this <= 0) return "0 B"
+
+    val units = arrayOf("B", "KB", "MB", "GB", "TB", "PB")
+    val base = 1024.0
+    val digitGroups = (Math.log10(this.toDouble()) / Math.log10(base)).toInt()
+
+    return if (digitGroups >= units.size) {
+        val maxIndex = units.size - 1
+        String.format(Locale.US, "%.1f %s", this / Math.pow(base, maxIndex.toDouble()), units[maxIndex])
+    } else {
+        val size = this / Math.pow(base, digitGroups.toDouble())
+        if (size % 1.0 == 0.0) {
+            String.format(Locale.US, "%d %s", size.toLong(), units[digitGroups])
+        } else {
+            String.format(Locale.US, "%.1f %s", size, units[digitGroups])
+        }
+    }
+}

app/src/main/kotlin/org/fossify/filemanager/fragments/StorageFragment.kt

@@ -22,8 +22,8 @@ import org.fossify.commons.extensions.beGone
 import org.fossify.commons.extensions.beVisible
 import org.fossify.commons.extensions.beVisibleIf
 import org.fossify.commons.extensions.fadeIn
-import org.fossify.commons.extensions.formatSize
 import org.fossify.commons.extensions.getIsPathDirectory
+import org.fossify.filemanager.extensions.formatSize
 import org.fossify.commons.extensions.getLongValue
 import org.fossify.commons.extensions.getProperBackgroundColor
 import org.fossify.commons.extensions.getProperPrimaryColor

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

@@ -26,6 +26,7 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:fillViewport="true"
+        android:fitsSystemWindows="true"
         android:orientation="vertical"
         android:scrollbars="none"
         app:layout_behavior="@string/appbar_scrolling_view_behavior">
@@ -38,7 +39,8 @@
             android:id="@+id/read_text_holder"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:fillViewport="true">
+            android:fillViewport="true"
+            android:fitsSystemWindows="true">
 
             <org.fossify.filemanager.views.GestureEditText
                 android:id="@+id/read_text_view"