Background
In this application, I was able to launch my camera preview that was developed in Android Studio with an aim to incorporate OpenCV into it. However, I face an error; the camera preview only lasts around 10 seconds until it crashes and the app shuts down. Would there be any way to resolve this? Here is my code;
MainActivity.java
package com.example.cv;import androidx.annotation.NonNull;import androidx.appcompat.app.AppCompatActivity;import androidx.core.app.ActivityCompat;import androidx.core.content.ContextCompat;import android.Manifest;import android.content.pm.PackageManager;import android.opengl.Matrix;import android.os.Bundle;import android.util.Log;import android.view.SurfaceView;import android.widget.Toast;import org.opencv.android.BaseLoaderCallback;import org.opencv.android.CameraBridgeViewBase;import org.opencv.android.JavaCameraView;import org.opencv.android.OpenCVLoader;import org.opencv.core.Core;import org.opencv.core.CvType;import org.opencv.core.Mat;import org.opencv.imgproc.Imgproc;public class MainActivity extends AppCompatActivity implements CameraBridgeViewBase.CvCameraViewListener2{ private static String TAG = "MainActivity"; JavaCameraView javaCameraView; Mat mRGBA, mRGBAT; private static final int MY_CAMERA_REQUEST_CODE = 100; BaseLoaderCallback baseLoaderCallback = new BaseLoaderCallback(MainActivity.this) { @Override public void onManagerConnected(int status) { if (status == BaseLoaderCallback.SUCCESS) { javaCameraView.enableView(); } else { super.onManagerConnected(status); } } }; static { if (OpenCVLoader.initDebug()) { Log.d(TAG, "OpenCV is Configured or Connected successfully."); } else { Log.d(TAG, "OpenCV not Working or Loaded."); } } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); javaCameraView = (JavaCameraView) findViewById(R.id.my_camera_view); if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) { Log.d(TAG, "Permissions granted"); javaCameraView.setCameraPermissionGranted(); javaCameraView.setCameraIndex(CameraBridgeViewBase.CAMERA_ID_BACK); javaCameraView.setVisibility(CameraBridgeViewBase.VISIBLE); javaCameraView.setCvCameraViewListener(this); } else { Log.d(TAG, "Permission prompt"); ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, MY_CAMERA_REQUEST_CODE); } } @Override public void onCameraViewStarted(int width, int height) { mRGBA = new Mat(height, width, CvType.CV_8UC4); } @Override public void onCameraViewStopped() { mRGBA.release(); } @Override public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) { mRGBA = inputFrame.rgba(); mRGBAT = mRGBA.t(); Core.flip(mRGBA.t(), mRGBAT, 1); Imgproc.resize(mRGBAT, mRGBAT, mRGBA.size()); return mRGBAT; } @Override public void onPointerCaptureChanged(boolean hasCapture) { } @Override protected void onDestroy() { super.onDestroy(); if (javaCameraView != null) { javaCameraView.disableView(); } } @Override protected void onPause() { super.onPause(); if (javaCameraView != null) { javaCameraView.disableView(); } } @Override protected void onResume() { super.onResume(); if (OpenCVLoader.initDebug()) { Log.d(TAG, "OpenCV is Configured or Connected successfully."); baseLoaderCallback.onManagerConnected(BaseLoaderCallback.SUCCESS); } else { Log.d(TAG, "OpenCV not Working or Loaded."); OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION, this, baseLoaderCallback); } } @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); if (requestCode == MY_CAMERA_REQUEST_CODE) { // camera can be turned on Toast.makeText(this, "camera permission granted", Toast.LENGTH_LONG).show(); javaCameraView.setCameraPermissionGranted(); javaCameraView.setCameraIndex(CameraBridgeViewBase.CAMERA_ID_FRONT); javaCameraView.setVisibility(CameraBridgeViewBase.VISIBLE); javaCameraView.setCvCameraViewListener(this); } else { //camera will stay off Toast.makeText(this, "camera permission denied", Toast.LENGTH_LONG).show(); } }}AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.cv"><uses-permission android:name="android.permission.CAMERA"/><uses-feature android:name="android.hardware.camera"/><uses-feature android:name="android.hardware.camera.autofocus"/><uses-feature android:name="android.hardware.camera.front"/><uses-feature android:name="android.hardware.camera.front.autofocus"/><application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"><activity android:name=".MainActivity"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application></manifest>activity_main.xml
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"><org.opencv.android.JavaCameraView android:id="@+id/my_camera_view" android:layout_width="fill_parent" android:layout_height="fill_parent" /></RelativeLayout>