Merge branch 'fix-autofocus' of https://github.com/oznecniV97/flutter…

…_barcode_reader into oznecniV97-fix-autofocus

android/src/main/kotlin/de/mintware/barcode_scan/ZXingAutofocusScannerView.kt

@@ -9,10 +9,12 @@ import me.dm7.barcodescanner.zxing.ZXingScannerView
 class ZXingAutofocusScannerView(context: Context) : ZXingScannerView(context) {
 
     private var callbackFocus = false
+    private var autofocusPresence = false
 
     override fun setupCameraPreview(cameraWrapper: CameraWrapper?) {
         cameraWrapper?.mCamera?.parameters?.let { parameters ->
             try {
+                autofocusPresence = parameters.supportedFocusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO);
                 parameters.focusMode = Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE
                 cameraWrapper.mCamera.parameters = parameters
             } catch (ex: Exception) {
@@ -23,6 +25,9 @@ class ZXingAutofocusScannerView(context: Context) : ZXingScannerView(context) {
     }
 
     override fun setAutoFocus(state: Boolean) {
-        super.setAutoFocus(callbackFocus)
+        //Fix to avoid crash on devices without autofocus (Issue #226)
+        if(autofocusPresence){
+            super.setAutoFocus(callbackFocus)
+        }
     }
 }