Fixed crash on Device with Local fa

Author: Rminsh

app/src/main/java/com/shalchian/sarrafi/activity/CalculatorActivity.java

@@ -54,6 +54,7 @@
 
 import java.text.NumberFormat;
 import java.util.ArrayList;
+import java.util.Locale;
 
 import io.github.inflationx.calligraphy3.CalligraphyConfig;
 import io.github.inflationx.calligraphy3.CalligraphyInterceptor;
@@ -231,10 +232,10 @@ public void onError(ANError error) {
   }
 
   private void calculate() {
-    if (editTextFirst.length() !=0 ) {
+    if (editTextFirst.length() !=0 && editTextFirst.getText() != null) {
       Double value = (Double.parseDouble(editTextFirst.getText().toString()) * firstValue) / secondValue;
 
-      NumberFormat numberFormat = NumberFormat.getInstance();
+      NumberFormat numberFormat = NumberFormat.getInstance(new Locale("en","US"));
       numberFormat.setGroupingUsed(false);
       editTextSecond.setText(JSONParser.addComma(numberFormat.format(value)));
     }

app/src/main/java/com/shalchian/sarrafi/utils/JSONParser.java

@@ -36,6 +36,7 @@
 import java.text.NumberFormat;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Locale;
 
 public class JSONParser {
   public static ArrayList<PriceModel> priceList(JSONObject response, String checkedFilter, Context context) throws JSONException {
@@ -366,7 +367,7 @@ public static String changeToToman(String price, boolean commaNeeded) {
     price = price.replace(",", "");
     double priceValue = Double.parseDouble(price) / 10;
 
-    NumberFormat numberFormat = NumberFormat.getInstance();
+    NumberFormat numberFormat = NumberFormat.getInstance(new Locale("en","US"));
     numberFormat.setGroupingUsed(false);
     price = numberFormat.format(priceValue);