人脸识别需要init初始化(FaceServer中),离开时需要unInit销毁;当一个含有人脸识别的界面A跳向另一个含有人脸识别的界面B时,由于初始化和销毁都是对FaceServer类加锁(synchronized (this) {})的,所以导致注册时为注销失败,或注册了又被注销失败。
FaceServer类中:
初始化:
public boolean init(Context context) {synchronized (this) {if (faceEngine == null && context != null) {faceEngine = new FaceEngine();int engineCode = faceEngine.init(context, FaceEngine.ASF_DETECT_MODE_IMAGE, FaceEngine.ASF_OP_0_HIGHER_EXT, 16, 1, FaceEngine.ASF_FACE_RECOGNITION | FaceEngine.ASF_FACE_DETECT);if (engineCode == ErrorInfo.MOK) {initFaceList(context);return true;} else {faceEngine = null;Log.e(TAG, "init: failed! code = " + engineCode);return false;}}return false;}}
销毁:
public void unInit() {synchronized (this) {if (faceRegisterInfoList != null) {faceRegisterInfoList.clear();faceRegisterInfoList = null;}if (faceEngine != null) {faceEngine.unInit();faceEngine = null;}}}
两个人脸识别界面都是用的同一个FaceServer类,synchronized导致如果当前有其他线程正持有该类锁,那么新到的线程就必须等待,所以
①A跳转B后注销A(uninit),则会导致B中初始化(init)时已存在faceEngine对象,然后注销A时又会删除faceEngine对象,导致人脸注册失败