add an option for showing hidden folders

app/src/main/java/com/simplemobiletools/gallery/Config.java

@@ -63,6 +63,14 @@ public class Config {
         mPrefs.edit().putInt(Constants.DIRECTORY_SORT_ORDER, order).apply();
     }
 
+    public boolean getShowHiddenFolders() {
+        return mPrefs.getBoolean(Constants.SHOW_HIDDEN_FOLDERS, false);
+    }
+
+    public void setShowHiddenFolders(boolean showHiddenFolders) {
+        mPrefs.edit().putBoolean(Constants.SHOW_HIDDEN_FOLDERS, showHiddenFolders).apply();
+    }
+
     public void addHiddenDirectory(String path) {
         final Set<String> hiddenFolders = getHiddenFolders();
         hiddenFolders.add(path);

app/src/main/java/com/simplemobiletools/gallery/Constants.java

@@ -15,7 +15,8 @@ public class Constants {
     public static final String IS_SAME_SORTING = "is_same_sorting";
     public static final String SORT_ORDER = "sort_order";
     public static final String DIRECTORY_SORT_ORDER = "directory_sort_order";
-    public static final String HIDDEN_FOLDERS = "hidden_foldersy";
+    public static final String HIDDEN_FOLDERS = "hidden_folders";
+    public static final String SHOW_HIDDEN_FOLDERS = "show_hidden_folders";
 
     // sorting
     public static final int SORT_BY_NAME = 1;

app/src/main/java/com/simplemobiletools/gallery/activities/SettingsActivity.java

@@ -14,6 +14,7 @@ import butterknife.OnClick;
 public class SettingsActivity extends SimpleActivity {
     @BindView(R.id.settings_dark_theme) SwitchCompat mDarkThemeSwitch;
     @BindView(R.id.settings_same_sorting) SwitchCompat mSameSortingSwitch;
+    @BindView(R.id.settings_show_hidden_folders) SwitchCompat mShowHiddenFoldersSwitch;
 
     private static Config mConfig;
 
@@ -26,6 +27,7 @@ public class SettingsActivity extends SimpleActivity {
 
         setupDarkTheme();
         setupSameSorting();
+        setupShowHiddenFolders();
     }
 
     private void setupDarkTheme() {
@@ -36,6 +38,10 @@ public class SettingsActivity extends SimpleActivity {
         mSameSortingSwitch.setChecked(mConfig.getIsSameSorting());
     }
 
+    private void setupShowHiddenFolders() {
+        mShowHiddenFoldersSwitch.setChecked(mConfig.getShowHiddenFolders());
+    }
+
     @OnClick(R.id.settings_dark_theme_holder)
     public void handleDarkTheme() {
         mDarkThemeSwitch.setChecked(!mDarkThemeSwitch.isChecked());
@@ -49,6 +55,12 @@ public class SettingsActivity extends SimpleActivity {
         mConfig.setIsSameSorting(mSameSortingSwitch.isChecked());
     }
 
+    @OnClick(R.id.settings_show_hidden_folders_holder)
+    public void handleShowHiddenFolders() {
+        mShowHiddenFoldersSwitch.setChecked(!mShowHiddenFoldersSwitch.isChecked());
+        mConfig.setShowHiddenFolders(mShowHiddenFoldersSwitch.isChecked());
+    }
+
     private void restartActivity() {
         TaskStackBuilder.create(getApplicationContext()).addNextIntentWithParentStack(getIntent()).startActivities();
     }

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

@@ -66,5 +66,33 @@
                 android:clickable="false"/>
 
         </RelativeLayout>
+
+        <RelativeLayout
+            android:id="@+id/settings_show_hidden_folders_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/settings_padding"
+            android:background="?attr/selectableItemBackground"
+            android:padding="@dimen/activity_margin">
+
+            <TextView
+                android:id="@+id/settings_show_hidden_folders_label"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_centerVertical="true"
+                android:paddingLeft="@dimen/settings_padding"
+                android:paddingStart="@dimen/settings_padding"
+                android:text="@string/show_hidden_folders"/>
+
+            <android.support.v7.widget.SwitchCompat
+                android:id="@+id/settings_show_hidden_folders"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_alignParentEnd="true"
+                android:layout_alignParentRight="true"
+                android:background="@null"
+                android:clickable="false"/>
+
+        </RelativeLayout>
     </LinearLayout>
 </ScrollView>

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

@@ -79,6 +79,7 @@
     <string name="settings">Einstellungen</string>
     <string name="dark_theme">Dunkles Thema</string>
     <string name="same_sorting">Selbe Sortierung für Dateien und Ordner</string>
+    <string name="show_hidden_folders">Show hidden folders</string>
 
     <!-- License -->
     <string name="notice">Diese App nutzt die folgenden Drittanbieterbilbiotheken, die mein Leben einfacher machen. Danke.</string>

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

@@ -79,6 +79,7 @@
     <string name="settings">Ajustes</string>
     <string name="dark_theme">Tema oscuro</string>
     <string name="same_sorting">Ordenar del mismo modo los archivos y las carpetas</string>
+    <string name="show_hidden_folders">Show hidden folders</string>
 
     <!-- License -->
     <string name="notice">Esta aplicación usa las siguientes bibliotecas de terceros que hacen mi vida más fácil. Gracias.</string>

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

@@ -79,6 +79,7 @@
     <string name="settings">Impostazioni</string>
     <string name="dark_theme">Tema scuro</string>
     <string name="same_sorting">Same sorting for files and folders</string>
+    <string name="show_hidden_folders">Show hidden folders</string>
 
     <!-- License -->
     <string name="notice">Questa app usa le seguenti librerie di terze parti per semplificarmi la vita. Grazie.</string>

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

@@ -79,6 +79,7 @@
     <string name="settings">設定</string>
     <string name="dark_theme">ダークテーマ</string>
     <string name="same_sorting">Same sorting for files and folders</string>
+    <string name="show_hidden_folders">Show hidden folders</string>
 
     <!-- License -->
     <string name="notice">このアプリは、私の人生を容易にするために、次のサードパーティのライブラリーを使用しています。 ありがとうございます。</string>

app/src/main/res/values-pt-rPT/strings.xml

@@ -79,6 +79,7 @@
     <string name="settings">Definições</string>
     <string name="dark_theme">Tema escuro</string>
     <string name="same_sorting">A mesma ordenação para ficheiros e pastas</string>
+    <string name="show_hidden_folders">Show hidden folders</string>
 
     <!-- License -->
     <string name="notice">Esta aplicação usa as seguintes bibliotecas de terceiros para facilitar a minha vida. Obrigado.</string>

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

@@ -79,6 +79,7 @@
     <string name="settings">Inställningar</string>
     <string name="dark_theme">Mörkt tema</string>
     <string name="same_sorting">Same sorting for files and folders</string>
+    <string name="show_hidden_folders">Show hidden folders</string>
 
     <!-- License -->
     <string name="notice">Denna app använder följande tredjepartsbibliotek för att göra mitt liv enklare. Tack.</string>

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

@@ -80,6 +80,7 @@
     <string name="settings">Settings</string>
     <string name="dark_theme">Dark theme</string>
     <string name="same_sorting">Same sorting for files and folders</string>
+    <string name="show_hidden_folders">Show hidden folders</string>
 
     <!-- License -->
     <string name="notice">This app uses the following third party libraries to make my life easier. Thank you.</string>