关于调用系统相机，图片翻转问题

package com.jitu.express.thailand.outfield.ui.face
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.graphics.Matrix
import android.media.ExifInterface
import java.io.File

/**

• Bitmap EXIF工具类

• 用于处理图片的EXIF信息，自动旋转和镜像校正
  */
  object BitmapExifUtil {

  /**

  • 从文件读取 EXIF 信息，自动旋转 & 镜像校正

  • @param file 拍照保存的文件

  • @return 方向正确的 Bitmap
    */
    fun decodeBitmapWithExif(file: File): Bitmap? {
    val options = BitmapFactory.Options().apply {
    inSampleSize = 2 // 减少内存占用
    }
    var bitmap = BitmapFactory.decodeFile(file.absolutePath, options) ?: return null

    try {
    val exif = ExifInterface(file.absolutePath)
    val orientation = exif.getAttributeInt(
    ExifInterface.TAG_ORIENTATION,
    ExifInterface.ORIENTATION_NORMAL
    )

     bitmap = when (orientation) {
         ExifInterface.ORIENTATION_ROTATE_90 -> rotateBitmap(bitmap, 90f)
         ExifInterface.ORIENTATION_ROTATE_180 -> rotateBitmap(bitmap, 180f)
         ExifInterface.ORIENTATION_ROTATE_270 -> rotateBitmap(bitmap, 270f)
    
         ExifInterface.ORIENTATION_FLIP_HORIZONTAL -> flipBitmapHorizontally(bitmap)
         ExifInterface.ORIENTATION_FLIP_VERTICAL -> flipBitmapVertically(bitmap)
    
         ExifInterface.ORIENTATION_TRANSPOSE -> {
             // 横向翻转后再旋转 90
             rotateBitmap(flipBitmapHorizontally(bitmap), 90f)
         }
         ExifInterface.ORIENTATION_TRANSVERSE -> {
             // 横向翻转后再旋转 270
             rotateBitmap(flipBitmapHorizontally(bitmap), 270f)
         }
    
         else -> bitmap
     }
    

    } catch (e: Exception) {
    e.printStackTrace()
    }

    return bitmap
    }

  /**

  • 旋转 Bitmap
    */
    private fun rotateBitmap(bitmap: Bitmap, degree: Float): Bitmap {
    val matrix = Matrix()
    matrix.postRotate(degree)
    return Bitmap.createBitmap(bitmap, 0, 0, bitmap.width, bitmap.height, matrix, true)
    }

  /**

  • 水平翻转 Bitmap
    */
    fun flipBitmapHorizontally(bitmap: Bitmap): Bitmap {
    val matrix = Matrix()
    matrix.preScale(-1f, 1f)
    return Bitmap.createBitmap(bitmap, 0, 0, bitmap.width, bitmap.height, matrix, true)
    }

  /**

  • 垂直翻转 Bitmap
    */
    private fun flipBitmapVertically(bitmap: Bitmap): Bitmap {
    val matrix = Matrix()
    matrix.preScale(1f, -1f)
    return Bitmap.createBitmap(bitmap, 0, 0, bitmap.width, bitmap.height, matrix, true)
    }
    }
    ----------调用decodeBitmapWithExif方法矫正旋转问题