36 - Migrate ExchangeRatePairValidator to ViewBinding

Author: yev-kanivets

app/src/main/java/com/blogspot/e_kanivets/moneytracker/util/validator/ExchangeRatePairValidator.java

@@ -2,47 +2,26 @@
 
 import android.content.Context;
 import androidx.annotation.NonNull;
-import com.google.android.material.textfield.TextInputLayout;
-import androidx.appcompat.widget.AppCompatSpinner;
-import android.view.View;
-import android.widget.EditText;
 import android.widget.Toast;
 
 import com.blogspot.e_kanivets.moneytracker.R;
+import com.blogspot.e_kanivets.moneytracker.databinding.ActivityAddExchangeRateBinding;
 import com.blogspot.e_kanivets.moneytracker.entity.ExchangeRatePair;
 
-import butterknife.BindView;
-import butterknife.ButterKnife;
-
-/**
- * Util class for Transfer validation.
- * Created on 13.12.2016.
- *
- * @author Evgenii Kanivets
- */
-
 @SuppressWarnings("WeakerAccess")
 public class ExchangeRatePairValidator implements IValidator<ExchangeRatePair> {
 
     @NonNull
     private final Context context;
 
-    @BindView(R.id.spinner_from_currency)
-    AppCompatSpinner spinnerFromCurrency;
-    @BindView(R.id.spinner_to_currency)
-    AppCompatSpinner spinnerToCurrency;
-    @BindView(R.id.til_buy)
-    TextInputLayout tilBuy;
-    @BindView(R.id.et_buy)
-    EditText etBuy;
-    @BindView(R.id.til_sell)
-    TextInputLayout tilSell;
-    @BindView(R.id.et_sell)
-    EditText etSell;
-
-    public ExchangeRatePairValidator(@NonNull Context context, @NonNull View view) {
+    private ActivityAddExchangeRateBinding binding;
+
+    public ExchangeRatePairValidator(
+            @NonNull Context context,
+            @NonNull ActivityAddExchangeRateBinding binding
+    ) {
         this.context = context;
-        ButterKnife.bind(this, view);
+        this.binding = binding;
         initTextWatchers();
     }
 
@@ -51,15 +30,15 @@ public boolean validate() {
         boolean valid = true;
 
         String fromCurrency = null;
-        if (spinnerFromCurrency.isEnabled()) {
-            fromCurrency = (String) spinnerFromCurrency.getSelectedItem();
+        if (binding.spinnerFromCurrency.isEnabled()) {
+            fromCurrency = (String) binding.spinnerFromCurrency.getSelectedItem();
         } else {
             valid = false;
         }
 
         String toCurrency = null;
-        if (spinnerToCurrency.isEnabled()) {
-            toCurrency = (String) spinnerToCurrency.getSelectedItem();
+        if (binding.spinnerToCurrency.isEnabled()) {
+            toCurrency = (String) binding.spinnerToCurrency.getSelectedItem();
         } else {
             valid = false;
         }
@@ -71,45 +50,45 @@ public boolean validate() {
 
         double amountBuy = Double.MAX_VALUE;
         try {
-            amountBuy = Double.parseDouble(etBuy.getText().toString().trim());
+            amountBuy = Double.parseDouble(binding.etBuy.getText().toString().trim());
         } catch (Exception e) {
             e.printStackTrace();
         }
 
         if (amountBuy == Double.MAX_VALUE) {
-            tilBuy.setError(context.getString(R.string.field_cant_be_empty));
+            binding.tilBuy.setError(context.getString(R.string.field_cant_be_empty));
             amountBuy = 0;
             valid = false;
         }
 
         if (amountBuy > MAX_ABS_VALUE) {
-            tilBuy.setError(context.getString(R.string.too_much_for_exchange));
+            binding.tilBuy.setError(context.getString(R.string.too_much_for_exchange));
             valid = false;
         }
 
         double amountSell = Double.MAX_VALUE;
         try {
-            amountSell = Double.parseDouble(etSell.getText().toString().trim());
+            amountSell = Double.parseDouble(binding.etSell.getText().toString().trim());
         } catch (Exception e) {
             e.printStackTrace();
         }
 
         if (amountSell == Double.MAX_VALUE) {
-            tilSell.setError(context.getString(R.string.field_cant_be_empty));
+            binding.tilSell.setError(context.getString(R.string.field_cant_be_empty));
             amountSell = 0;
             valid = false;
         }
 
         if (amountSell > MAX_ABS_VALUE) {
-            tilSell.setError(context.getString(R.string.too_much_for_exchange));
+            binding.tilSell.setError(context.getString(R.string.too_much_for_exchange));
             valid = false;
         }
 
         return valid;
     }
 
     private void initTextWatchers() {
-        etBuy.addTextChangedListener(new ClearErrorTextWatcher(tilBuy));
-        etSell.addTextChangedListener(new ClearErrorTextWatcher(tilSell));
+        binding.etBuy.addTextChangedListener(new ClearErrorTextWatcher(binding.tilBuy));
+        binding.etSell.addTextChangedListener(new ClearErrorTextWatcher(binding.tilSell));
     }
 }