diff --git a/fod/FingerprintInscreen.cpp b/fod/FingerprintInscreen.cpp
index 2764212..e5be291 100644
--- a/fod/FingerprintInscreen.cpp
+++ b/fod/FingerprintInscreen.cpp
@@ -22,6 +22,8 @@
 #include <fstream>
 #include <cmath>
 
+#define FINGERPRINT_ACQUIRED_VENDOR 6
+
 #define COMMAND_NIT 10
 #define PARAM_NIT_FOD 1
 #define PARAM_NIT_NONE 0
@@ -113,7 +115,29 @@ Return<void> FingerprintInscreen::onHideFODView() {
 }
 
 Return<bool> FingerprintInscreen::handleAcquired(int32_t acquiredInfo, int32_t vendorCode) {
-    LOG(ERROR) << "acquiredInfo: " << acquiredInfo << ", vendorCode: " << vendorCode;
+    std::lock_guard<std::mutex> _lock(mCallbackLock);
+    if (mCallback == nullptr) {
+        return false;
+    }
+
+    if (acquiredInfo == FINGERPRINT_ACQUIRED_VENDOR) {
+        if (vendorCode == 0) {
+            Return<void> ret = mCallback->onFingerDown();
+            if (!ret.isOk()) {
+                LOG(ERROR) << "FingerDown() error: " << ret.description();
+            }
+            return true;
+        }
+
+        if (vendorCode == 1) {
+            Return<void> ret = mCallback->onFingerUp();
+            if (!ret.isOk()) {
+                LOG(ERROR) << "FingerUp() error: " << ret.description();
+            }
+            return true;
+        }
+    }
+
     return false;
 }
 
@@ -143,7 +167,12 @@ Return<bool> FingerprintInscreen::shouldBoostBrightness() {
     return false;
 }
 
-Return<void> FingerprintInscreen::setCallback(const sp<IFingerprintInscreenCallback>& /* callback */) {
+Return<void> FingerprintInscreen::setCallback(const sp<IFingerprintInscreenCallback>& callback) {
+    {
+        std::lock_guard<std::mutex> _lock(mCallbackLock);
+        mCallback = callback;
+    }
+
     return Void();
 }
 
diff --git a/fod/FingerprintInscreen.h b/fod/FingerprintInscreen.h
index 9ee8ac4..8cad941 100644
--- a/fod/FingerprintInscreen.h
+++ b/fod/FingerprintInscreen.h
@@ -54,6 +54,9 @@ public:
 
 private:
     sp<IXiaomiFingerprint> xiaomiFingerprintService;
+
+    std::mutex mCallbackLock;
+    sp<IFingerprintInscreenCallback> mCallback;
 };
 
 }  // namespace implementation