feat: 添加相机捕获功能，更新 H5ShellPage 以支持媒体播放设置

android/app/src/main/kotlin/io/openim/flutter/openim/MainActivity.kt

@@ -10,6 +10,7 @@ import android.graphics.drawable.BitmapDrawable
 import android.graphics.drawable.Drawable
 import android.net.Uri
 import android.os.Build
+import android.provider.MediaStore
 import android.util.Base64
 import android.util.Log
 import androidx.core.content.FileProvider
@@ -29,6 +30,7 @@ class MainActivity : FlutterActivity() {
     private val MAX_BRANDING_ICON_SIZE = 192
     private val FILE_PICKER_REQUEST_CODE = 4201
     private var pendingFilePickerResult: MethodChannel.Result? = null
+    private var pendingCameraCaptureUri: Uri? = null
 
     override fun onCreate(savedInstanceState: android.os.Bundle?) {
         // 华为/荣耀/OPPO 等国产设备：在任意网络请求之前同步安装 Conscrypt，修复 SSL 握手失败（无 GMS 时系统 SSL 实现不完整）
@@ -116,7 +118,8 @@ class MainActivity : FlutterActivity() {
                 "pickFiles" -> {
                     val acceptTypes = call.argument<List<String>>("acceptTypes") ?: emptyList()
                     val allowMultiple = call.argument<Boolean>("allowMultiple") ?: false
-                    openNativeFilePicker(acceptTypes, allowMultiple, result)
+                    val capture = call.argument<Boolean>("capture") ?: false
+                    openNativeFilePicker(acceptTypes, allowMultiple, capture, result)
                 }
                 else -> {
                     result.notImplemented()
@@ -134,7 +137,20 @@ class MainActivity : FlutterActivity() {
                 return
             }
 
-            if (resultCode != Activity.RESULT_OK || data == null) {
+            if (resultCode != Activity.RESULT_OK) {
+                pendingCameraCaptureUri = null
+                result.success(emptyList<String>())
+                return
+            }
+
+            pendingCameraCaptureUri?.let { uri ->
+                pendingCameraCaptureUri = null
+                grantPickedFileReadPermission(uri)
+                result.success(listOf(uri.toString()))
+                return
+            }
+
+            if (data == null) {
                 result.success(emptyList<String>())
                 return
             }
@@ -164,6 +180,7 @@ class MainActivity : FlutterActivity() {
     private fun openNativeFilePicker(
         acceptTypes: List<String>,
         allowMultiple: Boolean,
+        capture: Boolean,
         result: MethodChannel.Result
     ) {
         if (pendingFilePickerResult != null) {
@@ -172,6 +189,10 @@ class MainActivity : FlutterActivity() {
         }
 
         val mimeTypes = normalizeMimeTypes(acceptTypes)
+        if (capture && openNativeCapture(mimeTypes, result)) {
+            return
+        }
+
         val intent = Intent(Intent.ACTION_OPEN_DOCUMENT).apply {
             addCategory(Intent.CATEGORY_OPENABLE)
             type = when (mimeTypes.size) {
@@ -199,6 +220,50 @@ class MainActivity : FlutterActivity() {
         }
     }
 
+    private fun openNativeCapture(
+        mimeTypes: List<String>,
+        result: MethodChannel.Result
+    ): Boolean {
+        pendingCameraCaptureUri = null
+        val captureVideo = mimeTypes.isNotEmpty() &&
+            mimeTypes.all { it.startsWith("video/") }
+        val intent = if (captureVideo) {
+            Intent(MediaStore.ACTION_VIDEO_CAPTURE)
+        } else {
+            Intent(MediaStore.ACTION_IMAGE_CAPTURE).apply {
+                val outputUri = createCameraCaptureUri(".jpg")
+                pendingCameraCaptureUri = outputUri
+                putExtra(MediaStore.EXTRA_OUTPUT, outputUri)
+                addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+                addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
+            }
+        }
+
+        pendingFilePickerResult = result
+        return try {
+            startActivityForResult(intent, FILE_PICKER_REQUEST_CODE)
+            true
+        } catch (e: Exception) {
+            pendingFilePickerResult = null
+            pendingCameraCaptureUri = null
+            false
+        }
+    }
+
+    private fun createCameraCaptureUri(extension: String): Uri {
+        val directory = externalCacheDir ?: cacheDir
+        val file = File.createTempFile(
+            "camera-capture-${System.currentTimeMillis()}",
+            extension,
+            directory
+        )
+        return FileProvider.getUriForFile(
+            this,
+            "${packageName}.fileprovider",
+            file
+        )
+    }
+
     private fun normalizeMimeTypes(acceptTypes: List<String>): List<String> {
         val mimeTypes = linkedSetOf<String>()
         acceptTypes

lib/main.dart

@@ -204,6 +204,7 @@ class _H5ShellPageState extends State<H5ShellPage> {
       unawaited(
         platformController.setOnShowFileSelector(_handleAndroidFileSelection),
       );
+      unawaited(platformController.setMediaPlaybackRequiresUserGesture(false));
     }
   }
 
@@ -220,6 +221,7 @@ class _H5ShellPageState extends State<H5ShellPage> {
         {
           'acceptTypes': params.acceptTypes,
           'allowMultiple': params.mode == FileSelectorMode.openMultiple,
+          'capture': params.isCaptureEnabled,
         },
       );
       return result ?? <String>[];