Android Studio OpenCV CascadeClassifier can't load

Hi everyone.

I'm developing an android application using OpenCV(https://opencv.org/) in Android Studio.

Since I'm a newbie to OpenCV I followed a guide from http://romanhosek.cz/android-eye-detection-updated-for-opencv-2-4-6/.

However I faced some issue related to CascadeClassifier.
Even though the argument in new CascaseClassifier() means correct exist file mJavaDetector.empty() and mJavaDetectorEye.empty() returned true.

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mJavaDetector = new CascadeClassifier(mCascadeFile.getAbsolutePath()); if (mJavaDetector.empty()) {     Log.e(TAG, "Failed to load cascade classifier1");     mJavaDetector = null; } else     Log.i(TAG, "Loaded cascade classifier from "             + mCascadeFile.getAbsolutePath());   mJavaDetectorEye = new CascadeClassifier(cascadeFileER.getAbsolutePath()); if (mJavaDetectorEye.empty()) {     Log.e(TAG, "Failed to load cascade classifier2");     mJavaDetectorEye = null; } else     Log.i(TAG, "Loaded cascade classifier from "             + cascadeFileER.getAbsolutePath());

How to fix this issue is simple. Just add below code by the blue shaded area.

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mJavaDetector = new CascadeClassifier(mCascadeFile.getAbsolutePath()); mJavaDetector.load(mCascadeFile.getAbsolutePath()); if (mJavaDetector.empty()) {     Log.e(TAG, "Failed to load cascade classifier1");     mJavaDetector = null; } else     Log.i(TAG, "Loaded cascade classifier from "             + mCascadeFile.getAbsolutePath());   mJavaDetectorEye = new CascadeClassifier(cascadeFileER.getAbsolutePath()); mJavaDetectorEye.load(cascadeFileER.getAbsolutePath()); if (mJavaDetectorEye.empty()) {     Log.e(TAG, "Failed to load cascade classifier2");     mJavaDetectorEye = null; } else     Log.i(TAG, "Loaded cascade classifier from "             + cascadeFileER.getAbsolutePath());