实现了双屏摄像头显示，添加了部分代码

app/src/main/java/com/sw/dualscreen/ext/CommonExt.kt

@@ -1,8 +1,15 @@
 package com.sw.dualscreen.ext
 
 import android.content.res.Resources
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
+import android.graphics.ImageFormat
+import android.graphics.Rect
+import android.graphics.YuvImage
 import android.util.TypedValue
 import androidx.annotation.Dimension
+import androidx.camera.core.ImageProxy
+import java.io.ByteArrayOutputStream
 
 /**
  * 将 Int 值转换为 dp 值
@@ -46,4 +53,30 @@ val Float.sp: Float
         TypedValue.COMPLEX_UNIT_SP,
         this,
         Resources.getSystem().displayMetrics
-    )
+    )
+
+// 添加扩展函数
+fun ImageProxy.toBitmap(): Bitmap {
+    val yBuffer = planes[0].buffer // Y
+    val uBuffer = planes[1].buffer // U
+    val vBuffer = planes[2].buffer // V
+
+    val ySize = yBuffer.remaining()
+    val uSize = uBuffer.remaining()
+    val vSize = vBuffer.remaining()
+
+    val nv21 = ByteArray(ySize + uSize + vSize)
+
+    // Y
+    yBuffer.get(nv21, 0, ySize)
+
+    // U/V
+    vBuffer.get(nv21, ySize, vSize)
+    uBuffer.get(nv21, ySize + vSize, uSize)
+
+    val yuvImage = YuvImage(nv21, ImageFormat.NV21, this.width, this.height, null)
+    val out = ByteArrayOutputStream()
+    yuvImage.compressToJpeg(Rect(0, 0, this.width, this.height), 100, out)
+    val imageBytes = out.toByteArray()
+    return BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.size)
+}