拍照增加测光

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

@@ -427,6 +427,9 @@ int NdkCamera::open(const std::string& cameraId) {
             status = ACaptureRequest_setEntry_u8(capture_request, ACAMERA_CONTROL_AE_MODE, 1, &aeMode);
             // ACaptureRequest_setEntry_i32(capture_request, ACAMERA_SENSOR_SENSITIVITY, 1, &sensitivity_);
 
+            uint8_t aePrecatureTrigger = ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER_START;
+            status = ACaptureRequest_setEntry_u8(capture_request, ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER, 1, &aePrecatureTrigger);
+
             uint8_t aeLockOff = ACAMERA_CONTROL_AE_LOCK_OFF;
             // ACaptureRequest_setEntry_u8(capture_request, ACAMERA_CONTROL_AE_LOCK, 1, &aeLockOff);
         } else {