spinner tweaks (#306)

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

@@ -101,7 +101,9 @@ public class WalletFragment extends Fragment
         ivSynced = (ImageView) view.findViewById(R.id.ivSynced);
 
         sCurrency = (Spinner) view.findViewById(R.id.sCurrency);
-        sCurrency.setAdapter(ArrayAdapter.createFromResource(getContext(), R.array.currency, R.layout.item_spinner_balance));
+        ArrayAdapter currencyAdapter = ArrayAdapter.createFromResource(getContext(), R.array.currency, R.layout.item_spinner_balance);
+        currencyAdapter.setDropDownViewResource(R.layout.item_spinner_dropdown_item);
+        sCurrency.setAdapter(currencyAdapter);
 
         bSend = (Button) view.findViewById(R.id.bSend);
         bReceive = (Button) view.findViewById(R.id.bReceive);

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

@@ -30,6 +30,7 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.inputmethod.EditorInfo;
 import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.ProgressBar;
@@ -166,7 +167,11 @@ public class ExchangeView extends LinearLayout
         etAmount = (TextInputLayout) findViewById(R.id.etAmount);
         tvAmountB = (TextView) findViewById(R.id.tvAmountB);
         sCurrencyA = (Spinner) findViewById(R.id.sCurrencyA);
+        ArrayAdapter adapter = ArrayAdapter.createFromResource(getContext(), R.array.currency, R.layout.item_spinner);
+        adapter.setDropDownViewResource(R.layout.item_spinner_dropdown_item);
+        sCurrencyA.setAdapter(adapter);
         sCurrencyB = (Spinner) findViewById(R.id.sCurrencyB);
+        sCurrencyB.setAdapter(adapter);
         evExchange = (ImageView) findViewById(R.id.evExchange);
         pbExchange = (ProgressBar) findViewById(R.id.pbExchange);
 

app/src/main/res/layout/fragment_wallet.xml

@@ -57,6 +57,7 @@
                 android:layout_marginStart="8dp"
                 android:entries="@array/currency"
                 android:gravity="center"
+                android:minWidth="80dp"
                 android:paddingBottom="2dp"
                 android:paddingEnd="4dp"
                 android:paddingStart="4dp"

app/src/main/res/layout/item_spinner.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@android:id/text1"
+    style="?android:attr/spinnerItemStyle"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:ellipsize="marquee"
+    android:gravity="center"
+    android:singleLine="true"
+    tools:text="XMR" />

app/src/main/res/layout/item_spinner_dropdown_item.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@android:id/text1"
+    style="?android:attr/spinnerDropDownItemStyle"
+    android:layout_width="match_parent"
+    android:minWidth="64dp"
+    android:layout_height="match_parent"
+    android:ellipsize="marquee"
+    android:padding="4dp"
+    android:singleLine="true"
+    android:textAlignment="center" />

app/src/main/res/layout/view_exchange.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <merge xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    tools:showIn="LinearLayout"
+    xmlns:tools="http://schemas.android.com/tools"
-    xmlns:tools="http://schemas.android.com/tools">
+    tools:showIn="LinearLayout">
 
     <LinearLayout
         android:layout_width="match_parent"
@@ -12,12 +12,12 @@
 
         <Spinner
             android:id="@+id/sCurrencyA"
-            android:layout_width="56dp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
             android:entries="@array/currency"
             android:gravity="center"
-            android:textAlignment="center" />
+            android:minWidth="56dp" />
 
         <com.m2049r.xmrwallet.widget.CTextInputLayout
             android:id="@+id/etAmount"
@@ -49,19 +49,18 @@
         <Spinner
             android:id="@+id/sCurrencyB"
             style="@style/MoneroSpinnerGray"
-            android:layout_width="56sp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
             android:entries="@array/currency"
             android:gravity="center"
-            android:paddingBottom="8dp"
+            android:minWidth="56dp"
-            android:paddingTop="8dp"
             android:textAlignment="center" />
 
         <TextView
             android:id="@+id/tvAmountB"
             style="@style/MoneroText"
-            android:layout_width="match_parent"
+            android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_gravity="center|start"
             android:layout_marginStart="16dp"