先取消测光，然后再触发

app/src/main/cpp/camera2/ndkcamera.cpp

@@ -1267,7 +1267,10 @@ void NdkCamera::onCaptureCompleted(ACameraCaptureSession* session, ACaptureReque
         }
         if (mResult.aeState == ACAMERA_CONTROL_AE_STATE_PRECAPTURE)
         {
-            uint8_t aePrecatureTrigger = ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER_START;
+            uint8_t aePrecatureTrigger = ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER_CANCEL;
+            status = ACaptureRequest_setEntry_u8(capture_request, ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER, 1, &aePrecatureTrigger);
+
+            aePrecatureTrigger = ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER_START;
             status = ACaptureRequest_setEntry_u8(capture_request, ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER, 1, &aePrecatureTrigger);
             XYLOG(XYLOG_SEVERITY_DEBUG, "Trigger PRECAPTURE status=%d AES=%u", (int)status, (unsigned int)mResult.aeState);
         }