add a setting for keeping last-modified field at copy/move/rename

Author: tibbi

app/build.gradle

@@ -37,7 +37,7 @@ android {
 }
 
 dependencies {
-    compile 'com.simplemobiletools:commons:2.34.1'
+    compile 'com.simplemobiletools:commons:2.34.2'
     compile 'com.bignerdranch.android:recyclerview-multiselect:0.2'
     compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 

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

@@ -27,6 +27,7 @@ class SettingsActivity : SimpleActivity() {
         setupManageFavorites()
         setupShowHidden()
         setupPasswordProtection()
+        setupKeepLastModified()
         setupEnableRootAccess()
         updateTextColors(settings_holder)
     }
@@ -81,6 +82,14 @@ class SettingsActivity : SimpleActivity() {
         }
     }
 
+    private fun setupKeepLastModified() {
+        settings_keep_last_modified.isChecked = config.keepLastModified
+        settings_keep_last_modified_holder.setOnClickListener {
+            settings_keep_last_modified.toggle()
+            config.keepLastModified = settings_keep_last_modified.isChecked
+        }
+    }
+
     private fun setupEnableRootAccess() {
         settings_enable_root_access_holder.beVisibleIf(config.isRootAvailable)
         settings_enable_root_access.isChecked = config.enableRootAccess

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

@@ -89,6 +89,26 @@
 
         </RelativeLayout>
 
+        <RelativeLayout
+            android:id="@+id/settings_keep_last_modified_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/medium_margin"
+            android:background="?attr/selectableItemBackground"
+            android:padding="@dimen/activity_margin">
+
+            <com.simplemobiletools.commons.views.MySwitchCompat
+                android:id="@+id/settings_keep_last_modified"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="@null"
+                android:clickable="false"
+                android:paddingLeft="@dimen/medium_margin"
+                android:paddingStart="@dimen/medium_margin"
+                android:text="@string/keep_last_modified"/>
+
+        </RelativeLayout>
+
         <RelativeLayout
             android:id="@+id/settings_enable_root_access_holder"
             android:layout_width="match_parent"