Added possibility to change currency.

app/src/main/AndroidManifest.xml

@@ -19,6 +19,7 @@
             </intent-filter>
         </activity>
         <activity android:name=".activity.AddCategoryActivity"/>
+        <activity android:name=".activity.ChangeCurrencyActivity"/>
 
         <receiver android:name=".receiver.FillExpenseNotificationReceiver">
             <intent-filter>

app/src/main/java/ajitsingh/com/expensemanager/activity/ChangeCurrencyActivity.java

@@ -0,0 +1,42 @@
+package ajitsingh.com.expensemanager.activity;
+
+import android.os.Bundle;
+import android.support.v4.app.FragmentActivity;
+import android.view.View;
+import android.widget.Spinner;
+import android.widget.Toast;
+
+import ajitsingh.com.expensemanager.R;
+import ajitsingh.com.expensemanager.database.CurrencyPreferencesHelper;
+import ajitsingh.com.expensemanager.presenter.CurrencyPresenter;
+import ajitsingh.com.expensemanager.view.CurrencyView;
+
+import static ajitsingh.com.expensemanager.activity.MainActivity.SELECT_ANOTHER_CURRENCY;
+
+public class ChangeCurrencyActivity extends FragmentActivity implements CurrencyView {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.chane_currency);
+        setSpinnerPosition();
+    }
+
+    private void setSpinnerPosition() {
+        CurrencyPreferencesHelper preferencesHelper = new CurrencyPreferencesHelper(this);
+        ((Spinner) findViewById(R.id.currency)).setSelection(preferencesHelper.getActualCurrencyPosition());
+    }
+
+    public void selectCurrency(View v) {
+        CurrencyPreferencesHelper preferencesHelper = new CurrencyPreferencesHelper(this);
+        CurrencyPresenter presenter = new CurrencyPresenter(this, preferencesHelper);
+        presenter.setCurrency();
+        Toast.makeText(this, R.string.currency_change_success, Toast.LENGTH_LONG).show();
+        finishActivity(SELECT_ANOTHER_CURRENCY);
+    }
+
+    @Override
+    public int getCurrency() {
+        Spinner spinner = (Spinner) findViewById(R.id.currency);
+        return spinner.getSelectedItemPosition();
+    }
+}

app/src/main/java/ajitsingh/com/expensemanager/activity/CurrentMonthExpenseFragment.java

@@ -14,6 +14,7 @@
 import java.util.List;
 
 import ajitsingh.com.expensemanager.R;
+import ajitsingh.com.expensemanager.database.CurrencyPreferencesHelper;
 import ajitsingh.com.expensemanager.database.ExpenseDatabaseHelper;
 import ajitsingh.com.expensemanager.presenter.CurrentMonthExpensePresenter;
 import ajitsingh.com.expensemanager.view.CurrentMonthExpenseView;
@@ -46,7 +47,8 @@ public void displayGraph(List<Bar> points) {
   @Override
   public void displayTotalExpense(Long totalExpense) {
     TextView totalExpenseTextBox = (TextView) getActivity().findViewById(R.id.current_months_total_expense);
-    totalExpenseTextBox.setText(getString(R.string.total_expense) + " " + getString(R.string.rupee_sym) + totalExpense);
+    CurrencyPreferencesHelper preferencesHelper = new CurrencyPreferencesHelper(getActivity());
+    totalExpenseTextBox.setText(getString(R.string.total_expense) + " " + preferencesHelper.getActualCurrency() + totalExpense);
   }
 
   @Override

app/src/main/java/ajitsingh/com/expensemanager/activity/CurrentWeekExpenseFragment.java

@@ -13,6 +13,7 @@
 
 import ajitsingh.com.expensemanager.R;
 import ajitsingh.com.expensemanager.adapter.CurrentWeeksExpenseAdapter;
+import ajitsingh.com.expensemanager.database.CurrencyPreferencesHelper;
 import ajitsingh.com.expensemanager.database.ExpenseDatabaseHelper;
 import ajitsingh.com.expensemanager.model.Expense;
 import ajitsingh.com.expensemanager.presenter.CurrentWeekExpensePresenter;
@@ -45,6 +46,7 @@ public void displayCurrentWeeksExpenses(Map<String, List<Expense>> expensesByDat
   @Override
   public void displayTotalExpenses(Long totalExpense) {
     TextView totalExpenseTextBox = (TextView) getActivity().findViewById(R.id.current_week_expense);
-    totalExpenseTextBox.setText(getString(R.string.total_expense) + " " + getString(R.string.rupee_sym) + totalExpense);
+    CurrencyPreferencesHelper preferencesHelper = new CurrencyPreferencesHelper(getActivity());
+    totalExpenseTextBox.setText(getString(R.string.total_expense) + " " + preferencesHelper.getActualCurrency() + totalExpense);
   }
 }

app/src/main/java/ajitsingh/com/expensemanager/activity/MainActivity.java

@@ -34,6 +34,7 @@ public class MainActivity extends FragmentActivity implements NavigationDrawerIt
   private ActionBarDrawerToggle actionBarDrawerToggle;
   private DrawerLayout drawerLayout;
   public static final int ADD_NEW_CAT = 9991;
+  public static final int SELECT_ANOTHER_CURRENCY = 9992;
   private static Boolean isNotificationScheduled = false;
   private HomeViewPagerAdapter homeViewPagerAdapter;
 
@@ -105,6 +106,11 @@ public boolean onOptionsItemSelected(MenuItem item) {
       startActivityForResult(intent, ADD_NEW_CAT);
       return true;
     }
+    if (id == R.id.action_change_currency) {
+      Intent intent = new Intent(this, ChangeCurrencyActivity.class);
+      startActivityForResult(intent, SELECT_ANOTHER_CURRENCY);
+      return true;
+    }
 
     return actionBarDrawerToggle.onOptionsItemSelected(item) || super.onOptionsItemSelected(item);
   }
@@ -116,6 +122,9 @@ protected void onActivityResult(int requestCode, int resultCode, Intent data) {
       viewPager.setAdapter(new HomeViewPagerAdapter(getSupportFragmentManager()));
       viewPager.setCurrentItem(0);
     }
+    if (requestCode == SELECT_ANOTHER_CURRENCY) {
+      goToHome();
+    }
   }
 
   public void onExpenseAdded() {

app/src/main/java/ajitsingh/com/expensemanager/activity/TodaysExpenseFragment.java

@@ -12,6 +12,7 @@
 
 import ajitsingh.com.expensemanager.R;
 import ajitsingh.com.expensemanager.adapter.TodaysExpenseListViewAdapter;
+import ajitsingh.com.expensemanager.database.CurrencyPreferencesHelper;
 import ajitsingh.com.expensemanager.database.ExpenseDatabaseHelper;
 import ajitsingh.com.expensemanager.model.Expense;
 import ajitsingh.com.expensemanager.presenter.TodaysExpensePresenter;
@@ -38,7 +39,8 @@ public void onActivityCreated(Bundle savedInstanceState) {
   @Override
   public void displayTotalExpense(Long totalExpense) {
     TextView totalExpenseTextBox = (TextView) getActivity().findViewById(R.id.total_expense);
-    totalExpenseTextBox.setText(getActivity().getString(R.string.total_expense) + " " + getActivity().getString(R.string.rupee_sym) + totalExpense.toString());
+    CurrencyPreferencesHelper preferencesHelper = new CurrencyPreferencesHelper(getActivity());
+    totalExpenseTextBox.setText(getActivity().getString(R.string.total_expense) + " " + preferencesHelper.getActualCurrency() + totalExpense.toString());
   }
 
   @Override

app/src/main/java/ajitsingh/com/expensemanager/adapter/CurrentWeeksExpenseAdapter.java

@@ -12,6 +12,7 @@
 import java.util.Map;
 
 import ajitsingh.com.expensemanager.R;
+import ajitsingh.com.expensemanager.database.CurrencyPreferencesHelper;
 import ajitsingh.com.expensemanager.model.Expense;
 import ajitsingh.com.expensemanager.utils.ExpenseCollection;
 
@@ -20,10 +21,12 @@
 public class CurrentWeeksExpenseAdapter implements ExpandableListAdapter {
   private Context context;
   private final Map<String, List<Expense>> expenses;
+  private CurrencyPreferencesHelper preferencesHelper;
 
   public CurrentWeeksExpenseAdapter(Context context, Map<String, List<Expense>> expenses) {
     this.context = context;
     this.expenses = expenses;
+    preferencesHelper = new CurrencyPreferencesHelper(context);
   }
 
   @Override
@@ -50,8 +53,8 @@ public int getChildrenCount(int position) {
   public Object getGroup(int position) {
     String date = (String) this.expenses.keySet().toArray()[position];
     Long totalExpense = new ExpenseCollection(this.expenses.get(date)).getTotalExpense();
-
-    return date + " (" + getDayName(date) + ") - " + context.getString(R.string.rupee_sym) + totalExpense;
+    CurrencyPreferencesHelper preferencesHelper = new CurrencyPreferencesHelper(context);
+    return date + " (" + getDayName(date) + ") - " + preferencesHelper.getActualCurrency() + totalExpense;
   }
 
   @Override

app/src/main/java/ajitsingh/com/expensemanager/database/CurrencyPreferencesHelper.java

@@ -0,0 +1,35 @@
+package ajitsingh.com.expensemanager.database;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
+
+import ajitsingh.com.expensemanager.R;
+
+public class CurrencyPreferencesHelper {
+    public static final String PREFERENCES_NAME = "currency_preferences";
+
+    private final Context context;
+
+    public CurrencyPreferencesHelper(Context context) {
+        this.context = context;
+    }
+
+    public void setCurrency(int currency) {
+        SharedPreferences preferences = context.getSharedPreferences(PREFERENCES_NAME, Context.MODE_PRIVATE);
+        Editor editor = preferences.edit();
+        editor.putInt("currency", currency);
+        editor.commit();
+    }
+
+    public String getActualCurrency() {
+        SharedPreferences preferences = context.getSharedPreferences(PREFERENCES_NAME, Context.MODE_PRIVATE);
+        String[] currencies = context.getResources().getStringArray(R.array.currency_symbols);
+        return currencies[preferences.getInt("currency", 0)];
+    }
+
+    public int getActualCurrencyPosition() {
+        SharedPreferences preferences = context.getSharedPreferences(PREFERENCES_NAME, Context.MODE_PRIVATE);
+        return preferences.getInt("currency", 0);
+    }
+}

app/src/main/java/ajitsingh/com/expensemanager/presenter/CurrencyPresenter.java

@@ -0,0 +1,23 @@
+package ajitsingh.com.expensemanager.presenter;
+
+import android.content.Context;
+
+import java.util.Currency;
+
+import ajitsingh.com.expensemanager.database.CurrencyPreferencesHelper;
+import ajitsingh.com.expensemanager.view.CurrencyView;
+
+public class CurrencyPresenter {
+    private final CurrencyView view;
+    private final CurrencyPreferencesHelper preferencesHelper;
+
+    public CurrencyPresenter(CurrencyView view, CurrencyPreferencesHelper preferencesHelper) {
+        this.view = view;
+        this.preferencesHelper = preferencesHelper;
+    }
+
+    public void setCurrency() {
+        int currency = view.getCurrency();
+        preferencesHelper.setCurrency(currency);
+    }
+}

app/src/main/java/ajitsingh/com/expensemanager/view/CurrencyView.java

@@ -0,0 +1,5 @@
+package ajitsingh.com.expensemanager.view;
+
+public interface CurrencyView {
+    int getCurrency();
+}

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

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/background_color"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin">
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:text="@string/action_change_currency"
+        android:textColor="@color/white"
+        android:textSize="25dp"
+        android:textStyle="bold" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="50dp"
+        android:background="@color/white"
+        android:orientation="vertical">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_marginBottom="10dp"
+            android:layout_marginEnd="10dp"
+            android:layout_marginStart="10dp"
+            android:layout_marginTop="10dp"
+            android:orientation="vertical">
+
+            <Spinner
+                android:id="@+id/currency"
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:entries="@array/currency_types" />
+
+            <Button
+                android:id="@+id/select_currency"
+                style="@style/button_primary"
+                android:layout_width="match_parent"
+                android:layout_height="60dp"
+                android:layout_marginTop="20dp"
+                android:onClick="selectCurrency"
+                android:text="@string/select_currency" />
+        </LinearLayout>
+    </LinearLayout>
+
+</RelativeLayout>

app/src/main/res/menu/menu_main.xml

@@ -6,4 +6,9 @@
         android:orderInCategory="100"
         android:showAsAction="never"
         android:title="@string/action_add_category"/>
+    <item
+        android:id="@+id/action_change_currency"
+        android:orderInCategory="100"
+        android:showAsAction="never"
+        android:title="@string/action_change_currency"/>
 </menu>

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

@@ -7,4 +7,16 @@
         <item>Rent</item>
         <item>Other</item>
     </array>
+    <array name="currency_types">
+        <item>Dollar $</item>
+        <item>Rupee ₹</item>
+        <item>Euro €</item>
+        <item>Yuan ¥</item>
+    </array>
+    <array name="currency_symbols">
+        <item>$</item>
+        <item>₹</item>
+        <item>€</item>
+        <item>¥</item>
+    </array>
 </resources>

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

@@ -17,6 +17,9 @@
     <string name="action_add_category">Add Category</string>
     <string name="category_empty_error">Category can not be empty!!</string>
     <string name="add_category_success">Category added successfully..</string>
+    <string name="action_change_currency">Change Currency</string>
+    <string name="select_currency">Select Currency</string>
+    <string name="currency_change_success">Currency changed successfully..</string>
 
     <array name="drawer_items">
         <item>Home</item>