adding a Settings button for emptying the recycle bin

app/src/main/kotlin/com/simplemobiletools/gallery/activities/SettingsActivity.kt

@@ -16,6 +16,7 @@ import com.simplemobiletools.commons.models.RadioItem
 import com.simplemobiletools.gallery.R
 import com.simplemobiletools.gallery.dialogs.ManageExtendedDetailsDialog
 import com.simplemobiletools.gallery.extensions.config
+import com.simplemobiletools.gallery.extensions.emptyTheRecycleBin
 import com.simplemobiletools.gallery.helpers.ROTATE_BY_ASPECT_RATIO
 import com.simplemobiletools.gallery.helpers.ROTATE_BY_DEVICE_ROTATION
 import com.simplemobiletools.gallery.helpers.ROTATE_BY_SYSTEM_SETTING
@@ -71,6 +72,7 @@ class SettingsActivity : SimpleActivity() {
         updateTextColors(settings_holder)
         setupSectionColors()
         setupUseRecycleBin()
+        setupEmptyRecycleBin()
     }
 
     private fun setupSectionColors() {
@@ -412,10 +414,18 @@ class SettingsActivity : SimpleActivity() {
     })
 
     private fun setupUseRecycleBin() {
+        settings_empty_recycle_bin_holder.beVisibleIf(config.useRecycleBin)
         settings_use_recycle_bin.isChecked = config.useRecycleBin
         settings_use_recycle_bin_holder.setOnClickListener {
             settings_use_recycle_bin.toggle()
             config.useRecycleBin = settings_use_recycle_bin.isChecked
+            settings_empty_recycle_bin_holder.beVisibleIf(config.useRecycleBin)
+        }
+    }
+
+    private fun setupEmptyRecycleBin() {
+        settings_empty_recycle_bin_holder.setOnClickListener {
+            emptyTheRecycleBin()
         }
     }
 }

app/src/main/kotlin/com/simplemobiletools/gallery/extensions/Activity.kt

@@ -205,13 +205,13 @@ fun BaseSimpleActivity.movePathsInRecycleBin(paths: ArrayList<String>, callback:
     }.start()
 }
 
-fun BaseSimpleActivity.emptyTheRecycleBin(callback: () -> Unit) {
+fun BaseSimpleActivity.emptyTheRecycleBin(callback: (() -> Unit)? = null) {
     Thread {
         filesDir.deleteRecursively()
         galleryDB.MediumDao().clearRecycleBin()
         galleryDB.DirectoryDao().deleteRecycleBin()
         toast(R.string.recycle_bin_emptied)
-        callback()
+        callback?.invoke()
     }.start()
 }
 

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

@@ -982,5 +982,27 @@
                 android:text="@string/move_items_into_recycle_bin"/>
 
         </RelativeLayout>
+
+        <RelativeLayout
+            android:id="@+id/settings_empty_recycle_bin_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/medium_margin"
+            android:background="?attr/selectableItemBackground"
+            android:paddingBottom="@dimen/activity_margin"
+            android:paddingLeft="@dimen/normal_margin"
+            android:paddingRight="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin">
+
+            <com.simplemobiletools.commons.views.MyTextView
+                android:id="@+id/settings_empty_recycle_bin"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_centerVertical="true"
+                android:paddingLeft="@dimen/medium_margin"
+                android:paddingStart="@dimen/medium_margin"
+                android:text="@string/empty_recycle_bin"/>
+
+        </RelativeLayout>
     </LinearLayout>
 </ScrollView>