RK3568实现Android平台搭建yolov5目标识别模型（Android Studio）

# 简介 - rknn_yolov5_android_apk_demo 是RK356X/RK3588上如何调用NPU的demo，该demo的基础模型是yolov5s # 使用说明 - 可以使用android studio 2021.2.1 （Windows）或者android studio 2021.3.1（Linux/macOS） 编译该工程 - yolov5s.rknn是使用rknn toolkit2将yolov5s.onnx转换而来，具体转换方法参考rknn toolkit2的examples/onnx/yolov5 # 代码说明 ## 代码分为两大部分： - JAVA: com.rockchip.gpadc.demo: 读取camera输入，并调用jni进行inference，并将结果显示出来 - JNI: 调用rknnrt进行实际inference # 权限 运行本程序需要Camera及EXTERNAL_STORAGE读写权限 # FAQ ## 编译时出现“files found with path 'lib/arm64-v8a/xxx.so' from inputs:”类似错误 ``` Execution failed for task ':app:mergeDebugNativeLibs'. > A failure occurred while executing com.android.build.gradle.internal.tasks.MergeNativeLibsTask$MergeNativeLibsTaskWorkAction > 2 files found with path 'lib/arm64-v8a/librga.so' from inputs: - rknpu2/examples/rknn_yolov5_android_apk_demo/app/build/intermediates/merged_jni_libs/debug/out/arm64-v8a/librga.so - rknpu2/examples/rknn_yolov5_android_apk_demo/app/build/intermediates/cxx/Debug/3f40b265/obj/arm64-v8a/librga.so If you are using jniLibs and CMake IMPORTED targets, see https://developer.android.com/r/tools/jniLibs-vs-imported-targets * Try: > Run with --info or --debug option to get more log output. > Run with --scan to get full insights. ``` 或者 ``` 2 files found with path 'lib/arm64-v8a/xxx.so' from inputs: - rknn_yolov5_android_apk_demo/app/build/intermediates/merged_jni_libs/debug/out/arm64-v8a/librga.so - rknn_yolov5_android_apk_demo/app/build/intermediates/cxx/Debug/3f40b265/obj/arm64-v8a/librga.so If you are using jniLibs and CMake IMPORTED targets, see https://developer.android.com/r/tools/jniLibs-vs-imported-targets ``` 则需要添加 app/build.gradle中的"jniLibs.srcDirs = ['libs']"，具体原因参考“https://developer.android.com/r/tools/jniLibs-vs-imported-targets” ## app启动时，出现"E/SurfaceView: Exception configuring surface"的错误 ``` D/rkyolo: camera facing: 1 V/rkyolo: Camera Supported Preview Size = 160x90 V/rkyolo: Camera Supported Preview Size = 320x180 V/rkyolo: Camera Supported Preview Size = 432x240 V/rkyolo: Camera Supported Preview Size = 640x360 V/rkyolo: Camera Supported Preview Size = 800x448 V/rkyolo: Camera Supported Preview Size = 864x480 V/rkyolo: Camera Supported Preview Size = 1024x576 V/rkyolo: Camera Supported Preview Size = 1280x720 V/rkyolo: Camera Supported Preview Size = 1600x896 V/rkyolo: Camera Supported Preview Size = 1920x1080 E/SurfaceView: Exception configuring surface java.lang.RuntimeException: setParameters failed at android.hardware.Camera.native_setParameters(Native Method) at android.hardware.Camera.setParameters(Camera.java:2068) at com.rockchip.gpadc.demo.MainActivity.setCameraParameters(MainActivity.java:295) at com.rockchip.gpadc.demo.MainActivity.startCamera(MainActivity.java:245) at com.rockchip.gpadc.demo.MainActivity.access$300(MainActivity.java:47) at com.rockchip.gpadc.demo.MainActivity$TSurfaceHolderCallback.surfaceCreated(MainActivity.java:199) ``` 是因为app设置的分辨率该camera不支持，需要修改"app/src/main/java/com/rockchip/gpadc/demo/rga/HALDefine.java"中CAMERA_PREVIEW_WIDTH及CAMERA_PREVIEW_HEIGHT为摄像头支持的分辨率。