相似度对比

app/src/main/java/com/base/filerecoveryrecyclebin/utils/SimilarHelper.kt

 package com.base.filerecoveryrecyclebin.utils
 
+import android.graphics.BitmapFactory
 import android.provider.MediaStore.Audio.Radio
 import java.io.File
 import kotlin.random.Random
@@ -46,9 +47,39 @@ object SimilarHelper {
 
     }
 
+
     private fun similarPercent(srcFile: File, compareFile: File): Int {
-        return Random.nextInt(60, 100)
+        var similarityScore:Double = 0.00
+        try {
+            val bitmap1 = BitmapFactory.decodeFile(srcFile.absolutePath)
+            val bitmap2 = BitmapFactory.decodeFile(compareFile.absolutePath)
+
+            if (bitmap1.width != bitmap2.width || bitmap1.height != bitmap2.height) {
+                return 0 // 如果尺寸不同，则直接返回0
+            }
+
+            var totalDifference = 0L
+            for (x in 0 until bitmap1.width) {
+                for (y in 0 until bitmap1.height) {
+                    val pixel1 = bitmap1.getPixel(x, y)
+                    val pixel2 = bitmap2.getPixel(x, y)
+                    val redDifference = (pixel1 shr 16 and 0xff) - (pixel2 shr 16 and 0xff)
+                    val greenDifference = (pixel1 shr 8 and 0xff) - (pixel2 shr 8 and 0xff)
+                    val blueDifference = (pixel1 and 0xff) - (pixel2 and 0xff)
+                    totalDifference += (redDifference * redDifference + greenDifference * greenDifference + blueDifference * blueDifference)
+                }
+            }
+
+            // 计算相似度得分
+            val maxDifference = bitmap1.width * bitmap1.height * 3 * 255 * 255
+            similarityScore = (1 - totalDifference.toDouble() / maxDifference) * 100
+
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
 
+        // 将相似度得分四舍五入到整数
+        return similarityScore.toInt().coerceIn(0, 100)
     }
 
 }
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