触发自动对焦

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

@@ -396,7 +396,10 @@ int NdkCamera::open(const std::string& cameraId) {
         }
         else
         {
-            m_imagesCaptured = 0;
+            uint8_t trig = ACAMERA_CONTROL_AF_TRIGGER_START;
+            res = ACaptureRequest_setEntry_u8(capture_request, ACAMERA_CONTROL_AF_TRIGGER, 1, &trig);
+            m_imagesCaptured = (res == ACAMERA_OK) ? ~0 : 0;
+            // m_imagesCaptured = 0;
         }
 
         uint8_t awbMode = ACAMERA_CONTROL_AWB_MODE_AUTO;