Fix compilation errors: OutputFileOptions constructor, composeImages method name, StaticLayout TextPaint, add missing imports

app/src/main/java/com/example/app/CameraActivity.kt

@@ -30,6 +30,7 @@ import androidx.core.app.ActivityCompat
 import androidx.core.content.ContextCompat
 import com.google.android.material.snackbar.Snackbar
 import java.io.ByteArrayOutputStream
+import java.io.File
 import java.io.IOException
 import java.io.OutputStream
 import java.text.SimpleDateFormat
@@ -198,7 +199,13 @@ class CameraActivity : AppCompatActivity() {
         val contentResolver = contentResolver
         val uri = contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues)
         
-        return ImageCapture.OutputFileOptions.Builder(contentResolver, uri).build()
+        return if (uri != null) {
+            ImageCapture.OutputFileOptions.Builder(contentResolver, uri).build()
+        } else {
+            // 如果插入失败，创建一个临时文件
+            val file = File.createTempFile("巡检_$timestamp", ".jpg", cacheDir)
+            ImageCapture.OutputFileOptions.Builder(file).build()
+        }
     }
 
     private fun showPhotoPreview(uri: Uri) {
@@ -262,8 +269,10 @@ class CameraActivity : AppCompatActivity() {
             return
         }
         
-        // 合成图片
-        val composedBitmap = compositor.composeImages(bitmaps, "巡检报告", "合成时间: ${Date()}")
+        // 合成图片到2x2网格
+        val composedGrid = compositor.composeImagesToGrid(bitmaps, 1200, 1600)
+        // 添加文字叠加
+        val composedBitmap = compositor.addTextOverlay(composedGrid, "巡检报告", "合成时间: ${Date()}")
         
         // 保存合成图片
         val timestamp = SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(Date())

app/src/main/java/com/example/app/ImageCompositor.kt

@@ -3,6 +3,7 @@ package com.example.app
 import android.graphics.*
 import android.text.StaticLayout
 import android.text.Layout
+import android.text.TextPaint
 import java.io.File
 import java.text.SimpleDateFormat
 import java.util.*
@@ -115,9 +116,10 @@ class ImageCompositor {
         paint: Paint, 
         maxHeight: Int
     ) {
+        val textPaint = TextPaint(paint)
         val staticLayout = StaticLayout.Builder
             .obtain(text, 0, text.length, 
-                    paint, (canvas.width * 0.9).toInt())
+                    textPaint, (canvas.width * 0.9).toInt())
             .setMaxLines(5) // 限制最大行数
             .setAlignment(Layout.Alignment.ALIGN_CENTER)
             .build()