创建新的 Mat 变量会使 android 应用程序崩溃

Question

我正在开发一个在部分代码中使用 openCV 的视觉定位系统。其中一个步骤涉及使用 Mats。我使用Mat newMat = Mat() 和Mat newMat = Mat(2, 2, CvType.CV_8UC3) 以及其他一些Cv 类型创建了一个新垫子。无论我尝试什么，当我运行代码时，只要它到达上述行，应用程序就会完全崩溃。堆栈跟踪报告两件事之一。当使用较长形式的 mat 声明（第二个代码 sn-p）时，它看起来像这样：

E/ActivityThread: Activity org.firstinspires.ftc.robotcontroller.internal.FtcRobotControllerActivity has leaked IntentReceiver com.qualcomm.analytics.Analytics@f31dd7d that was originally registered here. Are you missing a call to unregisterReceiver()?
                  android.app.IntentReceiverLeaked: Activity org.firstinspires.ftc.robotcontroller.internal.FtcRobotControllerActivity has leaked IntentReceiver com.qualcomm.analytics.Analytics@f31dd7d that was originally registered here. Are you missing a call to unregisterReceiver()?
                      at android.app.LoadedApk$ReceiverDispatcher.<init>(LoadedApk.java:918)
                      at android.app.LoadedApk.getReceiverDispatcher(LoadedApk.java:719)
                      at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1172)
                      at android.app.ContextImpl.registerReceiver(ContextImpl.java:1152)
                      at android.app.ContextImpl.registerReceiver(ContextImpl.java:1146)
                      at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:554)
                      at com.qualcomm.analytics.Analytics.register(SourceFile:209)
                      at com.qualcomm.analytics.Analytics.<init>(SourceFile:235)
                      at com.qualcomm.modernrobotics.ModernRoboticsUsbUtil.init(SourceFile:85)
                      at com.qualcomm.ftccommon.FtcEventLoop.init(FtcEventLoop.java:191)
                      at com.qualcomm.robotcore.eventloop.EventLoopManager.startEventLoop(EventLoopManager.java:571)
                      at com.qualcomm.robotcore.eventloop.EventLoopManager.setEventLoop(EventLoopManager.java:545)
                      at com.qualcomm.robotcore.eventloop.EventLoopManager.start(EventLoopManager.java:489)
                      at com.qualcomm.robotcore.robot.Robot.start(Robot.java:59)
                      at com.qualcomm.ftccommon.FtcRobotControllerService$RobotSetupRunnable$1.run(FtcRobotControllerService.java:186)
                      at com.qualcomm.robotcore.util.ThreadPool.logThreadLifeCycle(ThreadPool.java:513)
                      at com.qualcomm.ftccommon.FtcRobotControllerService$RobotSetupRunnable.run(FtcRobotControllerService.java:128)
                      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                      at java.lang.Thread.run(Thread.java:818)

但是我应该使用更短的形式（第一个代码 sn-p）吗？我得到这个以及第一个堆栈跟踪的内容

E/art: No implementation found for void org.opencv.core.Mat.n_delete(long) (tried Java_org_opencv_core_Mat_n_1delete and Java_org_opencv_core_Mat_n_1delete__J)
E/System: Uncaught exception thrown by finalizer
E/System: java.lang.UnsatisfiedLinkError: No implementation found for void org.opencv.core.Mat.n_delete(long) (tried Java_org_opencv_core_Mat_n_1delete and Java_org_opencv_core_Mat_n_1delete__J)
              at org.opencv.core.Mat.n_delete(Native Method)
              at org.opencv.core.Mat.finalize(Mat.java:911)
              at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:202)
              at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:185)
              at java.lang.Thread.run(Thread.java:818)

是否有关于代码导致崩溃的原因的简单解释？在我现在运行的代码中，唯一的几行是类声明、函数声明和 mat 声明，但这似乎就是全部。

Answer 1

所以事实证明，主要活动中缺少几行代码。他们加载 openCV 库，如果不存在，则使用 openCV 库应用程序。

这在 OnCreate 中进行

if(!OpenCVLoader.initDebug()) {
          RobotLog.d("OpenCV", "Internal OpenCV library not found. Using OpenCV Manager for Initialization");
          OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_1_0, this, mOpenCVCallBack);
      }else{
          RobotLog.d("OpenCV", "OpenCV library found inside package. Using it!");
          mOpenCVCallBack.onManagerConnected(LoaderCallbackInterface.SUCCESS);
      }
  }

这正好在主要活动类的声明下方：

private BaseLoaderCallback mOpenCVCallBack = new BaseLoaderCallback(this) {


        @Override
          public void onManagerConnected(int status){
              switch (status){
                  case LoaderCallbackInterface.SUCCESS:
                  {
                      RobotLog.i(TAG, "OpenCV Loaded Sucessfully");
                  }break;
                  default:
                  {
                      super.onManagerConnected(status);
                  }break;
              }
          }
      };