简介本资源是一个面向Unity中高级开发者与Android原生开发者的跨平台集成插件项目聚焦解决Unity引擎在Android平台无法直接调用系统级相机预览、拍照、录像及相册读写等核心功能的痛点。项目通过Java/Kotlin编写原生模块、C语言实现JNI桥接层、C#脚本封装Unity侧API并配套完成AndroidManifest.xml权限配置实现高性能、低延迟的双向通信。压缩包共43个文件含18个Unity Asset资源如Plugins/Android下aar与so库、4个核心C#接口脚本、1个AndroidManifest.xml、1个README.md、1个说明文件.txt及1个附赠资源.docx含API说明与权限配置要点整体仅65KB轻量易集成。已有29人下载学习适合需在AR游戏、扫码工具、UGC内容创作类App中深度定制相机流或相册交互的开发者提供即插即用的工程结构、完整权限声明范例与JNI调用链路参考。1. 项目概述为什么Unity开发者需要亲手“拧开”Android相机和相册的螺丝Unity做跨平台开发图的是省事——写一套C#逻辑跑iOS、Android、PC都行。但真到调用原生相机拍照、从相册选图、甚至控制闪光灯模式、设置预览分辨率、处理HEIC格式缩略图时Unity自带的WebCamTexture和NativeGallery插件就露怯了。前者只支持基础预览和截图不支持手动对焦、连拍、RAW输出后者在Android 10强制分区存储Scoped Storage后频繁崩溃报错java.lang.SecurityException: Permission Denial或Failed to find configured root。我去年帮一个医疗影像APP做合规升级客户要求必须支持医院PACS系统指定的DICOM元数据写入流程Unity默认API连EXIF字段都改不了——最后硬着头皮重写了整套JNI桥接层。这个标题里的“Unity与Android原生相机及相册深度集成插件”核心不是“能用”而是“可控”。它把Unity C#层变成一个调度中心C#发指令比如“启动1280×720预览启用自动曝光禁用美颜滤镜”Java/Kotlin层真正执行硬件操作C通过JNI做高性能图像处理如YUV转RGB、直方图均衡化再把处理后的Bitmap或文件路径回传给C#。整个链路里AndroidManifest.xml不是摆设——它要声明uses-permission android:nameandroid.permission.CAMERA/、uses-feature android:nameandroid.hardware.camera.autofocus /还要配置provider标签解决Android 7.0的FileProvider路径问题否则content://URI根本打不开。而.zip包里那个jni/目录藏着用NDK编译的.so库负责把Camera2 API捕获的ImageReader输出直接喂给Unity纹理跳过Java层Bitmap转换的内存拷贝损耗。这不是“调个API”是把Unity引擎当胶水把Android原生能力一层层剥开、重新组装。如果你正在开发需要合规拍照如身份证识别、高帧率扫码如物流分拣、多图拼接如全景拍摄或离线相册管理如隐私相册加密的项目这个插件就是你绕不开的底层基建。它不承诺“一键接入”但承诺“每一行代码你都能debug”——Java端有Logcat日志C端能用Android Studio的LLDB单步调试C#端可加断点看JNI调用参数。接下来我会拆解这套方案怎么从零搭起包括为什么选Kotlin而非Java写Activity、为什么JNI函数名必须带Java_com_yourpackage_前缀、以及如何让Unity Player在Android 12上拿到MANAGE_EXTERNAL_STORAGE权限而不被Google Play拒审。2. 整体架构设计三层桥接不是堆砌而是各司其职的精密咬合2.1 为什么必须分三层——绕不开的Android生命周期与Unity线程模型Unity在Android上运行时主线程Main Thread负责渲染和C#脚本更新而Android UI操作如弹出相机界面、读取相册必须在UI线程执行。如果直接在C#里调用AndroidJavaObject去startActivity会触发CalledFromWrongThreadException。更麻烦的是Camera2 API的ImageReader回调发生在独立的HandlerThread而Unity的Texture2D.LoadImage()必须在主线程调用。这就逼出三层结构C#层Unity侧定义清晰的业务接口如CameraManager.TakePhoto(string savePath, int width, int height)。它不碰任何Android类只通过AndroidJavaClass和AndroidJavaObject发起JNI调用把参数序列化成jstring和jint传过去。关键设计点在于所有异步操作拍照、选图都封装成TaskT用AsyncOperation包装避免阻塞主线程。例如调用TakePhoto后立即返回TaskTexture2D内部用AndroidJavaRunnable监听Java层回调再用MainThreadDispatcher把结果切回Unity主线程。Java/Kotlin层Android侧这是真正的“胶水层”。它接收C#传来的参数启动CameraActivity或Intent.ACTION_PICK处理权限请求ActivityCompat.requestPermissions并在onActivityResult中解析返回的Uri或Bitmap。这里必须用Kotlin——不是赶时髦而是suspendCoroutine能天然解决回调地狱。比如处理Camera2的CaptureRequest.Builder配置Java要写一堆new CameraCaptureSession.StateCallback(){...}匿名类Kotlin一行val session cameraDevice.createCaptureSession(...)搞定。更重要的是Kotlin的JvmStatic注解能让C#通过AndroidJavaClass直接调静态方法不用实例化对象减少JNI开销。C层JNI侧负责性能敏感任务。比如从ImageReader获取Image对象后它的getPlanes()[0].getBuffer()返回的是YUV_420_888格式的原始字节直接转Bitmap要调用YuvImage类耗时30ms。而用C写NEON指令优化的YUV转RGB函数耗时压到8ms以内。JNI函数命名规则强制要求Java_com_yourpackage_CameraBridge_nativeProcessYUV其中com_yourpackage必须和Unity工程的Package Name完全一致否则dlsym找不到符号。.so库编译时要针对arm64-v8a和armeabi-v7a双架构因为Unity默认打包这两个ABI漏掉任何一个都会在部分机型闪退。提示不要试图用C#直接调用Android SDK类。Unity的AndroidJavaObject(android.hardware.Camera)在Android 5.0已废弃Camera2 API必须通过CameraManager而它没有无参构造函数C#无法实例化。JNI是唯一可靠通道。2.2 Manifest配置不是复制粘贴而是精准匹配Android版本演进AndroidManifest.xml在这个项目里不是配角而是决定成败的守门员。Android 6.0引入运行时权限7.0强制FileProvider10.0启用分区存储12.0收紧后台启动Activity——每一步都得在Manifest里留痕!-- 基础权限必须声明 -- uses-permission android:nameandroid.permission.CAMERA / uses-permission android:nameandroid.permission.READ_EXTERNAL_STORAGE android:maxSdkVersion28 / uses-permission android:nameandroid.permission.WRITE_EXTERNAL_STORAGE android:maxSdkVersion28 / !-- Android 11 需要 MANAGE_EXTERNAL_STORAGE但Google Play审核极严 -- uses-permission android:nameandroid.permission.MANAGE_EXTERNAL_STORAGE tools:ignoreScopedStorage / !-- 分区存储下读取媒体文件的替代权限 -- uses-permission android:nameandroid.permission.READ_MEDIA_IMAGES / uses-permission android:nameandroid.permission.READ_MEDIA_VIDEO / !-- 硬件特性声明影响Google Play分发 -- uses-feature android:nameandroid.hardware.camera android:requiredtrue / uses-feature android:nameandroid.hardware.camera.autofocus android:requiredfalse / uses-feature android:nameandroid.hardware.camera.flash android:requiredfalse / !-- FileProvider配置解决Android 7.0 URI暴露问题 -- provider android:nameandroidx.core.content.FileProvider android:authorities${applicationId}.fileprovider android:exportedfalse android:grantUriPermissionstrue meta-data android:nameandroid.support.FILE_PROVIDER_PATHS android:resourcexml/file_paths / /provider !-- 自定义CameraActivity避免Unity默认Activity干扰 -- activity android:name.CameraActivity android:exportedtrue android:themeandroid:style/Theme.Translucent.NoTitleBar.Fullscreen /关键细节android:maxSdkVersion28限定旧存储权限只在Android 9及以下生效避免新系统误用。tools:ignoreScopedStorage是给IDE的提示实际提交APK时需移除否则审核不通过。FileProvider的authorities必须和C#里AndroidJavaObject(androidx.core.content.FileProvider).CallStaticstring(getUriForFile, ...)传入的字符串完全一致否则IllegalArgumentException: Failed to find configured root。CameraActivity必须android:exportedtrue否则Android 12无法从Unity启动。2.3 JNI桥接设计函数签名不是随便写而是ABI兼容的契约JNI函数签名是C和Java/Kotlin之间的法律合同。C#调用AndroidJavaClass.CallStatic(nativeTakePhoto, ...)时JVM会在.so库里找Java_com_yourpackage_CameraBridge_nativeTakePhoto函数。这个函数名由三部分构成Java_包名转下划线类名_方法名。例如Java类com.example.unitybridge.CameraBridge的静态方法nativeTakePhoto对应C函数名Java_com_example_unitybridge_CameraBridge_nativeTakePhoto。参数类型必须严格匹配JNI规范JNIEnv* envJVM环境指针所有JNI调用入口。jclass clazz当前Java类的Class引用用于反射调用。jstring jSavePathC#传来的路径字符串需用env-GetStringUTFChars(jSavePath, nullptr)转为C风格字符串。jint jWidth, jint jHeight直接转为int。返回值jobject如果是Bitmap需用env-NewObject(bitmapClass, bitmapConstructor, ...)创建。最易踩坑的是字符串编码。Android Java用UTF-16C用UTF-8GetStringUTFChars返回的是修改过的UTF-8非标准必须配对调用ReleaseStringUTFChars释放内存否则内存泄漏。实测发现连续拍照100次后未释放的jstring会让App OOM。注意不要在JNI函数里直接调用__android_log_print打log。Unity的Logcat会被过滤应统一用env-CallVoidMethod(logHelper, logMethod, env-NewStringUTF(msg))把日志转发到Java层再由Java用Log.d输出确保所有日志可见。3. 核心模块实现从权限申请到图像回传的完整链路3.1 权限申请模块动态权限不是“弹窗完事”而是状态机驱动Android 6.0的权限申请是状态机不是线性流程。用户点“拒绝”后下次再申请会直接失败必须先判断shouldShowRequestPermissionRationale。Unity C#层封装如下public static async Taskbool RequestCameraPermission() { // 先检查是否已有权限 if (Permission.HasUserAuthorizedPermission(Permission.Camera)) return true; // Unity内置权限请求仅Android 6.0有效 var request Permission.RequestUserPermission(Permission.Camera); await request.Task; // 等待用户操作 // 检查结果 if (request.Permission Permission.PermissionStatus.Granted) return true; // 被拒绝且不应再提示用户勾选了不再询问 if (request.Permission Permission.PermissionStatus.Denied !Permission.ShouldShowRequestPermissionRationale(Permission.Camera)) { // 弹出引导Dialog说明权限必要性 ShowPermissionRationaleDialog(); return false; } // 被拒绝但可再次申请 return false; }Java/Kotlin层需响应C#的权限请求。C#调用AndroidJavaClass.CallStatic(requestCameraPermission, activityContext)后Kotlin代码JvmStatic fun requestCameraPermission(activity: Activity) { if (Build.VERSION.SDK_INT Build.VERSION_CODES.M) { activity.requestPermissions( arrayOf(Manifest.permission.CAMERA), CAMERA_PERMISSION_REQUEST_CODE ) } } // 在Activity的onRequestPermissionsResult中处理 override fun onRequestPermissionsResult( requestCode: Int, permissions: Arrayout String, grantResults: IntArray ) { super.onRequestPermissionsResult(requestCode, permissions, grantResults) when (requestCode) { CAMERA_PERMISSION_REQUEST_CODE - { if (grantResults.isNotEmpty() grantResults[0] PackageManager.PERMISSION_GRANTED) { // 权限授予通知C#层 UnityPlayer.currentActivity.runOnUiThread { val unityClass AndroidJavaClass(com.unity3d.player.UnityPlayer) val unityActivity unityClass.GetStaticAndroidJavaObject(currentActivity) unityActivity.Call(onPermissionGranted, camera) } } else { // 权限拒绝区分是否不再询问 val shouldShow ActivityCompat.shouldShowRequestPermissionRationale( this, Manifest.permission.CAMERA ) UnityPlayer.currentActivity.runOnUiThread { val unityClass AndroidJavaClass(com.unity3d.player.UnityPlayer) val unityActivity unityClass.GetStaticAndroidJavaObject(currentActivity) unityActivity.Call(onPermissionDenied, camera, shouldShow) } } } } }关键点C#不能直接监听onRequestPermissionsResult必须通过Java层回调。UnityPlayer.currentActivity是Unity主Activity的引用runOnUiThread确保回调在UI线程执行。onPermissionGranted和onPermissionDenied是C#里定义的public方法用[System.Runtime.InteropServices.DllImport(__Internal)]导出供Java调用。3.2 相机预览模块Camera2 API不是“打开就完事”而是状态流控Camera2比旧Camera API复杂十倍但换来精确控制。核心对象关系CameraManager→CameraDevice→CaptureRequest.Builder→CaptureSession。预览流程分四步打开相机cameraManager.openCamera(cameraId, stateCallback, backgroundHandler)。stateCallback监听onOpened事件获取CameraDevice。创建预览SurfaceUnity的RenderTexture不能直接当Surface用需创建SurfaceView或TextureView。推荐TextureView因其getSurfaceTexture()返回SurfaceTexture可绑定到Surface。构建CaptureRequestpreviewBuilder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO)启用自动曝光previewBuilder.set(CaptureRequest.LENS_FOCUS_DISTANCE, 0f)设为无穷远previewBuilder.addTarget(previewSurface)添加预览目标。开启CaptureSessioncameraDevice.createCaptureSession(Arrays.asList(previewSurface), sessionCallback, backgroundHandler)。sessionCallback的onConfigured里调用captureSession.setRepeatingRequest(previewRequest, null, backgroundHandler)开始预览。Kotlin实现要点backgroundHandler必须是独立HandlerThread避免阻塞UI线程。TextureView的setSurfaceTextureListener要在onSurfaceTextureAvailable里初始化Camera否则SurfaceTexture为空。预览尺寸必须从StreamConfigurationMap获取支持的尺寸不能硬编码。val outputSizes characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP)!!.getOutputSizes(SurfaceTexture::class.java)。C#层控制接口public void StartPreview(int width, int height) { // 获取TextureView的SurfaceTexture var textureView new AndroidJavaObject(android.view.TextureView); var surfaceTexture textureView.CallAndroidJavaObject(getSurfaceTexture); // 调用Java层启动预览 _cameraBridge.Call(startPreview, surfaceTexture, width, height); }3.3 拍照与图像处理模块JNI不是“搬运工”而是性能加速器拍照后ImageReader的OnImageAvailableListener收到Image对象。Java层提取YUV数据override fun onImageAvailable(reader: ImageReader) { val image reader.acquireLatestImage() ?: return val planes image.planes val buffer planes[0].buffer // Y plane val yData ByteArray(buffer.capacity()) buffer.get(yData) // 调用JNI处理YUV val resultBitmap processYUVInJNI(yData, planes[1].buffer, planes[2].buffer, image.width, image.height) // 回传Bitmap给Unity sendBitmapToUnity(resultBitmap) image.close() }C JNI函数processYUVInJNI核心逻辑extern C { JNIEXPORT jobject JNICALL Java_com_example_unitybridge_CameraBridge_processYUVInJNI( JNIEnv *env, jclass clazz, jbyteArray yData, jbyteArray uData, jbyteArray vData, jint width, jint height) { // 将jbyteArray转为C数组 jbyte* yBytes env-GetByteArrayElements(yData, nullptr); jbyte* uBytes env-GetByteArrayElements(uData, nullptr); jbyte* vBytes env-GetByteArrayElements(vData, nullptr); // 分配RGB输出缓冲区 uint8_t* rgbBuffer new uint8_t[width * height * 3]; // NEON优化的YUV420转RGB伪代码 yuv420_to_rgb_neon(yBytes, uBytes, vBytes, rgbBuffer, width, height); // 创建Bitmap对象 jclass bitmapClass env-FindClass(android/graphics/Bitmap); jmethodID createBitmapMethod env-GetStaticMethodID( bitmapClass, createBitmap, (IILandroid/graphics/Bitmap$Config;)Landroid/graphics/Bitmap; ); jclass configClass env-FindClass(android/graphics/Bitmap$Config); jfieldID argb8888Field env-GetStaticFieldID(configClass, ARGB_8888, Landroid/graphics/Bitmap$Config;); jobject config env-GetStaticObjectField(configClass, argb8888Field); jobject bitmap env-CallStaticObjectMethod( bitmapClass, createBitmapMethod, width, height, config ); // 将rgbBuffer写入Bitmap jobject bitmapBuffer env-CallObjectMethod(bitmap, env-GetMethodID(bitmapClass, copyPixelsFromBuffer, (Ljava/nio/Buffer;)V)); // 清理内存 env-ReleaseByteArrayElements(yData, yBytes, JNI_ABORT); env-ReleaseByteArrayElements(uData, uBytes, JNI_ABORT); env-ReleaseByteArrayElements(vData, vBytes, JNI_ABORT); delete[] rgbBuffer; return bitmap; } }性能对比纯JavaYuvImage.compressToJpeg()耗时约45ms1080pJNI NEON优化后8.2ms帧率从22fps提升到58fps。关键优化点使用vld2q_u8一次加载16字节YUV数据。vmlal_s16并行计算RGB分量。输出缓冲区预分配避免new/delete开销。3.4 相册选择模块ContentResolver不是“查表”而是URI权限博弈Android 10分区存储下file://URI失效必须用content://。C#调用AndroidJavaObject(android.content.Intent).Call(setData, uri)时Java层需用ContentResolver查询真实路径JvmStatic fun getRealPathFromUri(context: Context, uri: Uri): String? { var cursor: Cursor? null return try { val column MediaStore.Images.Media.DATA cursor context.contentResolver.query(uri, arrayOf(column), null, null, null) if (cursor ! null cursor.moveToFirst()) { val index cursor.getColumnIndexOrThrow(column) cursor.getString(index) } else { // Android 10 用DocumentFile解析 val docFile DocumentFile.fromSingleUri(context, uri) docFile?.let { val file File(context.cacheDir, temp_image.jpg) val inputStream context.contentResolver.openInputStream(uri) inputStream?.use { input - FileOutputStream(file).use { output - input.copyTo(output) } } file.absolutePath } } } finally { cursor?.close() } }C#层处理public async TaskTexture2D SelectFromGallery() { // 启动相册Intent var intent new AndroidJavaObject(android.content.Intent, android.intent.action.GET_CONTENT); intent.CallAndroidJavaObject(setType, image/*); // 启动Activity并等待结果 var activity new AndroidJavaClass(com.unity3d.player.UnityPlayer) .GetStaticAndroidJavaObject(currentActivity); activity.Call(startActivityForResult, intent, GALLERY_REQUEST_CODE); // 等待Java层回调 return await _galleryTaskSource.Task; }Java层onActivityResultoverride fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) { super.onActivityResult(requestCode, resultCode, data) if (requestCode GALLERY_REQUEST_CODE resultCode Activity.RESULT_OK) { data?.data?.let { uri - // 获取真实路径 val realPath getRealPathFromUri(this, uri) // 加载为Texture2D loadTextureFromPath(realPath) } } }提示getRealPathFromUri在Android 11可能返回null必须降级到DocumentFile方案。FileProvider生成的content://URI只能通过ContentResolver.openInputStream()读取不能直接new File(uri.path)。4. 实操避坑指南那些文档里不会写的血泪教训4.1 构建与打包常见问题排查问题现象根本原因解决方案Uncaught exception java.lang.UnsatisfiedLinkError: dlopen failed: library libmain.so not found.so库未放入Assets/Plugins/Android/libs/对应ABI文件夹或Unity未勾选ARM64架构检查Assets/Plugins/Android/libs/arm64-v8a/libmain.so是否存在在Player Settings Other Settings Target Architectures勾选ARM64java.lang.ClassNotFoundException: Didnt find class com.example.unitybridge.CameraBridgeJava类包名与C#调用的AndroidJavaClass(com.example.unitybridge.CameraBridge)不一致或类未被ProGuard混淆确保Java类package com.example.unitybridge;在proguard-user.txt添加-keep class com.example.unitybridge.** { *; }E/Unity: AndroidJavaException: java.lang.SecurityException: Permission DenialAndroidManifest.xml未声明uses-permission或activity未设android:exportedtrueAndroid 12检查Manifest权限声明确认CameraActivity的exported属性为trueE/Unity: AndroidJavaException: java.lang.IllegalArgumentException: Failed to find configured rootFileProvider的authorities与C#代码中getUriForFile传入的字符串不匹配对比AndroidManifest.xml的android:authorities和C#中com.yourpackage.fileprovider是否完全一致独家技巧Unity打包时Assets/Plugins/Android/AndroidManifest.xml会自动合并到最终APK的Manifest中但合并规则优先级低。若遇到权限丢失直接在Player Settings Publishing Settings Build App Bundle下勾选Custom Main Manifest指向你手写的完整Manifest文件绕过自动合并。4.2 运行时典型故障与调试法问题1预览黑屏Logcat显示W/CameraBase: Camera initialization failed这是CameraManager.openCamera失败的典型表现。原因通常是设备无前置/后置摄像头CameraCharacteristics.LENS_FACING判断错误其他App占用了相机如微信视频通话SurfaceTexture未正确绑定textureView.setSurfaceTextureListener未设置调试步骤在Java层openCamera前加Log.d(CAMERA, Opening camera $cameraId)检查CameraManager.availableCameraIds是否包含目标ID在TextureView.SurfaceTextureListener.onSurfaceTextureAvailable里打印surfaceTexture地址确认非null问题2拍照后图片旋转90度Camera2的JPEG_ORIENTATION需要手动设置。CaptureRequest.Builder必须添加val rotation activity.windowManager.defaultDisplay.rotation val sensorOrientation characteristics.get(CameraCharacteristics.SENSOR_ORIENTATION)!! val jpegOrientation (sensorOrientation rotation * 90) % 360 captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, jpegOrientation)问题3Unity Texture2D显示绿色噪点这是YUV转RGB时UV平面步长stride计算错误。Image.Plane.getBuffer()的remaining()返回的是有效字节数但Image.Plane.getRowStride()才是实际行宽。正确做法val yPlane image.planes[0] val uPlane image.planes[1] val vPlane image.planes[2] val yBuffer yPlane.buffer val uBuffer uPlane.buffer val vBuffer vPlane.buffer // 步长必须用getRowStride()不能用capacity() val yStride yPlane.rowStride val uStride uPlane.rowStride val vStride vPlane.rowStride4.3 性能优化实战经验预览帧率卡顿关闭TextureView的setOpaque(false)改为setOpaque(true)减少GPU合成开销。内存暴涨ImageReader的acquireLatestImage()会保留最新一帧旧帧需手动close()。务必在onImageAvailable末尾调用image.close()否则OOM。JNI调用延迟将频繁调用的JNI函数标记为JNIEXPORT JNICALL避免JVM查找开销。Unity 2021.3支持[DllImport(libmain)]直接调用C函数比AndroidJavaObject快3倍。APK体积膨胀.so库用strip --strip-unneeded移除调试符号在build.gradle中启用minifyEnabled trueProGuard保留JNI函数名-keepclasseswithmembernames class * { native methods; }。4.4 Google Play审核红线清单MANAGE_EXTERNAL_STORAGE权限除非应用是文件管理器、备份工具等核心场景否则Google Play会拒审。替代方案用MediaStoreAPI写入图片到Environment.DIRECTORY_PICTURES用StorageManager的getPrimaryStorageVolume().createOpenDocumentTree()请求目录访问后台启动ActivityAndroid 10禁止后台Service启动Activity。Unity的Application.backgroundBehavior设为BackgroundBehavior.Suspend确保App进入后台时暂停相机预览。隐私政策链接APK的AndroidManifest.xml必须包含meta-data android:namecom.google.android.gms.ads.APPLICATION_ID android:valueca-app-pub-xxx/如有广告且隐私政策页需在Play Console上传。5. 扩展与维护建议让插件随项目演进而进化这个插件不是“一次交付”而是持续迭代的基础设施。我建议三个扩展方向第一增加ML Kit集成在JNI层调用Google ML Kit的ImageLabeler对ImageReader的实时帧做物体识别。C#层只需传入Texture2DJava层用FirebaseVisionImage.fromByteBuffer()转换C层用std::vectorfloat传递识别结果坐标避免Java层频繁创建对象。实测在Pixel 4上YOLOv5s模型推理耗时120ms比纯Java快3倍。第二支持HEIC格式iOS拍照默认HEICAndroid 10也支持。Java层用ImageDecoder解码HEIC但ImageDecoder.Source需从ContentResolver获取ParcelFileDescriptor不能用FileInputStream。C层可集成libheif用heif_context_read_from_file()直接解析节省Java层IO开销。第三构建CI/CD流水线用GitHub Actions自动编译.so库。build.yml中定义jobs: build-jni: runs-on: ubuntu-latest steps: - uses: actions/checkoutv3 - name: Setup NDK uses: android-actions/setup-ndkv2 - name: Build arm64-v8a run: ndk-build APP_ABIarm64-v8a - name: Upload artifact uses: actions/upload-artifactv3 with: name: libmain.so path: libs/arm64-v8a/libmain.so每次Push到jni/目录自动触发编译保证.so库与C代码同步。最后分享一个真实教训某次升级Android Gradle Plugin到8.1FileProvider的android:authorities解析方式变更导致getUriForFile返回null。我们花了两天排查最终发现是build.gradle里android.defaultConfig.applicationId未同步更新。所以永远把applicationId、AndroidManifest.xml的package、C#里AndroidJavaClass的字符串、JNI函数名中的包名这四处视为同一变量——改一处四处分发。这比写100行代码更重要。本文还有配套的精品资源点击获取