说明

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}

dependencies {
        compile 'com.github.kongqw:FaceDetectLibrary:1.2.1'
}

android {
    ……
    packagingOptions {
        exclude 'META-INF/services/javax.annotation.processing.Processor'
        pickFirst 'org/bytedeco/javacpp/macosx-x86_64/libusb-1.0.dylib'
        pickFirst 'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.properties'
        pickFirst 'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.xml'
        pickFirst 'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.properties'
        pickFirst 'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.xml'
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest ……>

    <application
        ……>
        <activity
            ……
            android:screenOrientation="landscape">
            ……
        </activity>
    </application>

</manifest>

<com.kongqw.view.CameraFaceDetectionView
        android:id="@+id/cameraFaceDetectionView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

CameraFaceDetectionView cameraFaceDetectionView = (CameraFaceDetectionView) findViewById(R.id.cameraFaceDetectionView);
cameraFaceDetectionView.setOnFaceDetectorListener(new CameraFaceDetectionView.OnFaceDetectorListener() {
    @Override
    public void onFace(Mat mat, Rect rect) {

    }
});

mCameraFaceDetectionView.setOnOpenCVInitListener(new OnOpenCVInitListener() {
    @Override
    public void onLoadSuccess() {
        Log.i(TAG, "onLoadSuccess: ");
    }

    @Override
    public void onLoadFail() {
        Log.i(TAG, "onLoadFail: ");
    }

    @Override
    public void onMarketError() {
        Log.i(TAG, "onMarketError: ");
    }

    @Override
    public void onInstallCanceled() {
        Log.i(TAG, "onInstallCanceled: ");
    }

    @Override
    public void onIncompatibleManagerVersion() {
        Log.i(TAG, "onIncompatibleManagerVersion: ");
    }

    @Override
    public void onOtherError() {
        Log.i(TAG, "onOtherError: ");
    }
});

mCameraFaceDetectionView.loadOpenCV(getApplicationContext());

mCameraFaceDetectionView.switchCamera();

boolean isSave = FaceUtil.saveImage(Context context, Mat mat, Rect rect, String fileName);

boolean isSave = FaceUtil.deleteImage(Context context, String fileName);

Bitmap bitmap = FaceUtil.getImage(Context context, String fileName);

double score = FaceUtil.compare(Context context, String fileName1, String fileName2);