Option to remember and reuse selected fiat (#967)

app/build.gradle

@@ -8,8 +8,8 @@ android {
         compileSdk 35
         minSdkVersion 21
         targetSdkVersion 35
-        versionCode 4104
-        versionName "4.1.4 'Exolix'"
+        versionCode 4105
+        versionName "4.1.5 'Exolix'"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         externalNativeBuild {
             cmake {

app/src/main/java/com/m2049r/xmrwallet/WalletFragment.java

@@ -51,6 +51,7 @@
 import com.m2049r.xmrwallet.service.exchange.api.ExchangeRate;
 import com.m2049r.xmrwallet.util.Helper;
 import com.m2049r.xmrwallet.util.ServiceHelper;
+import com.m2049r.xmrwallet.util.StickyFiatHelper;
 import com.m2049r.xmrwallet.util.ThemeHelper;
 import com.m2049r.xmrwallet.widget.Toolbar;
 
@@ -131,6 +132,7 @@ public View onCreateView(LayoutInflater inflater, ViewGroup container,
         ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<>(requireContext(), R.layout.item_spinner_balance, currencies);
         spinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
         sCurrency.setAdapter(spinnerAdapter);
+        StickyFiatHelper.setPreferredCurrencyPosition(sCurrency);
 
         bSend = view.findViewById(R.id.bSend);
         bReceive = view.findViewById(R.id.bReceive);
@@ -182,6 +184,7 @@ public void onDismissedBySwipeRight(RecyclerView recyclerView, int[] reverseSort
         sCurrency.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
             @Override
             public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
+                StickyFiatHelper.setPreferredFiatSymbol(requireContext(), (String) sCurrency.getSelectedItem());
                 refreshBalance();
             }
 
@@ -315,13 +318,7 @@ public void exchange(final ExchangeRate exchangeRate) {
             balanceCurrency = Helper.BASE_CRYPTO;
             balanceRate = 1.0;
         } else {
-            int spinnerPosition = ((ArrayAdapter) sCurrency.getAdapter()).getPosition(exchangeRate.getQuoteCurrency());
-            if (spinnerPosition < 0) { // requested currency not in list
-                Timber.e("Requested currency not in list %s", exchangeRate.getQuoteCurrency());
-                sCurrency.setSelection(0, true);
-            } else {
-                sCurrency.setSelection(spinnerPosition, true);
-            }
+            StickyFiatHelper.setCurrencyPosition(sCurrency, exchangeRate.getQuoteCurrency());
             balanceCurrency = exchangeRate.getQuoteCurrency();
             balanceRate = exchangeRate.getRate();
         }

app/src/main/java/com/m2049r/xmrwallet/util/StickyFiatHelper.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2024 m2049r
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.m2049r.xmrwallet.util;
+
+import android.content.Context;
+import android.widget.ArrayAdapter;
+import android.widget.Spinner;
+
+import androidx.preference.PreferenceManager;
+
+import com.m2049r.xmrwallet.R;
+
+public class StickyFiatHelper {
+
+    public static String getPreferredFiatSymbol(Context ctx) {
+        if (PreferenceManager.getDefaultSharedPreferences(ctx)
+                .getBoolean(ctx.getString(R.string.preferred_stickyfiat), false)) {
+            return PreferenceManager.getDefaultSharedPreferences(ctx)
+                    .getString(ctx.getString(R.string.preferred_stickyfiat_pref), Helper.BASE_CRYPTO);
+        }
+        return null;
+    }
+
+    public static void setPreferredFiatSymbol(Context ctx, String symbol) {
+        if (PreferenceManager.getDefaultSharedPreferences(ctx)
+                .getBoolean(ctx.getString(R.string.preferred_stickyfiat), false)) {
+            PreferenceManager.getDefaultSharedPreferences(ctx).edit()
+                    .putString(ctx.getString(R.string.preferred_stickyfiat_pref), symbol).apply();
+        }
+    }
+
+
+    public static void setPreferredCurrencyPosition(Spinner spinner) {
+        String stickyFiat = StickyFiatHelper.getPreferredFiatSymbol(spinner.getContext());
+        if (stickyFiat != null) {
+            StickyFiatHelper.setCurrencyPosition(spinner, stickyFiat);
+        }
+    }
+
+    public static void setCurrencyPosition(Spinner spinner, String symbol) {
+        int spinnerPosition = ((ArrayAdapter) spinner.getAdapter()).getPosition(symbol);
+        if (spinnerPosition < 0) { // requested currency not in list
+            spinner.setSelection(0, true);
+        } else {
+            spinner.setSelection(spinnerPosition, true);
+        }
+    }
+}

app/src/main/java/com/m2049r/xmrwallet/widget/ExchangeEditText.java

@@ -41,6 +41,7 @@
 import com.m2049r.xmrwallet.service.exchange.api.ExchangeRate;
 import com.m2049r.xmrwallet.util.Helper;
 import com.m2049r.xmrwallet.util.ServiceHelper;
+import com.m2049r.xmrwallet.util.StickyFiatHelper;
 import com.m2049r.xmrwallet.util.ThemeHelper;
 
 import java.util.ArrayList;
@@ -181,7 +182,8 @@ protected void setCurrencyAdapter(Spinner spinner, List<String> currencies) {
     }
 
     void setInitialSpinnerSelections(Spinner baseSpinner, Spinner quoteSpinner) {
-        baseSpinner.setSelection(0, true);
+        //baseSpinner.setSelection(0, true);
+        StickyFiatHelper.setPreferredCurrencyPosition(baseSpinner);
         quoteSpinner.setSelection(0, true);
     }
 

app/src/main/java/com/m2049r/xmrwallet/widget/ExchangeView.java

@@ -44,6 +44,7 @@
 import com.m2049r.xmrwallet.service.exchange.api.ExchangeRate;
 import com.m2049r.xmrwallet.util.Helper;
 import com.m2049r.xmrwallet.util.ServiceHelper;
+import com.m2049r.xmrwallet.util.StickyFiatHelper;
 import com.m2049r.xmrwallet.util.ThemeHelper;
 
 import java.util.ArrayList;
@@ -174,6 +175,7 @@ protected void onFinishInflate() {
         pbExchange = findViewById(R.id.pbExchange);
 
         setCurrencyAdapter(sCurrencyA);
+        StickyFiatHelper.setPreferredCurrencyPosition(sCurrencyA);
         setCurrencyAdapter(sCurrencyB);
 
         // make progress circle gray

app/src/main/res/values/strings.xml

@@ -461,6 +461,7 @@
     <string name="preferred_nightmode" translatable="false">preferred_nightmode</string>
     <string name="preferred_locale" translatable="false">preferred_locale</string>
     <string name="preferred_lock" translatable="false">preferred_lock</string>
+    <string name="preferred_stickyfiat" translatable="false">preferred_stickyfiat</string>
     <string name="about_info" translatable="false">about_info</string>
     <string name="privacy_info" translatable="false">privacy_info</string>
     <string name="credits_info" translatable="false">credits_info</string>
@@ -510,4 +511,8 @@
     <string name="open_wallet_sidekick_missing">Please connect Sidekick device</string>
     <string name="fab_restore_sidekick">Restore from Sidekick</string>
     <string name="sidekick_connected">Sidekick Connected</string>
+
+    <string name="setting_stickyfiat">Sticky Fiat</string>
+    <string name="setting_stickyfiat_summary">Remember last used fiat currency</string>
+    <string name="preferred_stickyfiat_pref" translatable="false">preferred_stickyfiat_pref</string>
 </resources>

app/src/main/res/xml/root_preferences.xml

@@ -24,6 +24,11 @@
             android:defaultValue="false"
             android:key="@string/preferred_lock"
             android:title="@string/setting_lock" />
+        <SwitchPreference
+            android:defaultValue="false"
+            android:key="@string/preferred_stickyfiat"
+            android:summary="@string/setting_stickyfiat_summary"
+            android:title="@string/setting_stickyfiat" />
     </PreferenceCategory>
     <PreferenceCategory app:title="@string/title_info">
         <Preference