应用开发

/* 人脸识别能力类 */
import com.huawei.facerecognition.FaceManager;
/* 人脸识别实例工厂类 */
import com.huawei.facerecognition.HwFaceManagerFactory;

FaceManager faceManager = HwFaceManagerFactory.getFaceManager(getApplicationContext());

/* 人脸识别取消信号初始化 */
CancellationSignal signal = null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
    signal = new CancellationSignal();
}

/* 人脸识别回调初始化 */
FaceManager.AuthenticationCallback callback = new FaceManager.AuthenticationCallback() {
    @Override
    public void onAuthenticationError(int errMsgId, CharSequence errString) {
        /* 人脸识别过程中错误信息回调函数，返回识别过程中错误信息 */
    }

    @Override
    public void onAuthenticationHelp(int helpMsgId, CharSequence helpString) {
        /* 人脸识别过程中提示信息回调函数，返回识别过程中提示信息 */
    }

    @Override
    public void onAuthenticationSucceeded(FaceManager.AuthenticationResult result) {
        /* 人脸识别成功回调函数，表明本次人脸识别成功 */
    }

    @Override
    public void onAuthenticationFailed() {
        /* 人脸识别失败回调函数，表明本次人脸识别失败 */
    }
};

/* 发起一次人脸识别 */
if (faceManager != null) {
    boolean isSupport = false;
    boolean isEnrolled = false;
    boolean is3D = false;

    try {
        /* 获取人脸识别能力 */
        FaceManager.FaceRecognitionCapability capability = faceManager.getFaceRecognitionCapability();
        if (capability == null) {
            Log.e(TAG, "capability is null");
            return;
        }
        isSupport = capability.isSupport;
        isEnrolled = capability.isEnrolled;
        is3D = capability.is3D;
    } catch (NoSuchMethodError e) {
        /* EMUI 11.0.1之前版本, getFaceRecognitionCapability方法不存在，使用老接口获取人脸识别能力 */
        isSupport = faceManager.isHardwareDetected();
        isEnrolled = faceManager.hasEnrolledTemplates();
        /* EMUI 11.0.1之前版本, 仅支持3D人脸识别 */
        is3D = true;
    }

    /* 检查当前设备是否支持人脸识别 */
    if (isSupport) {
        /* 检查当前设备是否已录入人脸 */
        if (isEnrolled) {
            /* 显示当前设备是否支持3D人脸 */
            modality.setText("Face Recognition Modality: " + (is3D ? "3D" : "2D"));
            /* 调用人脸识别功能 */
            faceManager.authenticate(null, signal, 0, callback, null);
        } else {
            ShowToastUtils.showToast(MainActivity.this, "No enrolled face", Toast.LENGTH_SHORT);
        }
    } else {
        ShowToastUtils.showToast(MainActivity.this, "This device does not support face recognition",
            Toast.LENGTH_SHORT);
    }
}