识别图片处理、查询菜品数据

app/src/main/java/com/sw/dualscreen/utils/BitmapCropper.kt

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+package com.sw.dualscreen.utils
+import android.graphics.Bitmap
+
+object BitmapCropper {
+    /**
+     * 裁剪Bitmap中心区域为指定尺寸
+     * @param original 原始Bitmap
+     * @param targetWidth 目标宽度
+     * @param targetHeight 目标高度
+     * @return 裁剪后的Bitmap
+     */
+    fun cropCenter(original: Bitmap, targetWidth: Int, targetHeight: Int): Bitmap {
+        val originalWidth = original.width
+        val originalHeight = original.height
+        
+        // 计算中心点坐标
+        var startX = (originalWidth - targetWidth) / 2
+        var startY = (originalHeight - targetHeight) / 2
+        
+        // 边界检查
+        startX = startX.coerceAtLeast(0)
+        startY = startY.coerceAtLeast(0)
+        val actualWidth = minOf(targetWidth, originalWidth - startX)
+        val actualHeight = minOf(targetHeight, originalHeight - startY)
+        
+        return Bitmap.createBitmap(original, startX, startY, actualWidth, actualHeight)
+    }
+}
+
+// 使用示例
+fun main() {
+    // 假设这是从资源加载的Bitmap
+    val originalBitmap = Bitmap.createBitmap(1000, 1000, Bitmap.Config.ARGB_8888)
+    
+    // 裁剪中心500x500区域
+    val croppedBitmap = BitmapCropper.cropCenter(originalBitmap, 500, 500)
+    println("裁剪后尺寸：${croppedBitmap.width}x${croppedBitmap.height}")
+}