add a toggle for forcing English language, if it isnt the device language

app/build.gradle

@@ -45,7 +45,7 @@ ext {
 }
 
 dependencies {
-    compile 'com.simplemobiletools:commons:2.37.2'
+    compile 'com.simplemobiletools:commons:2.37.6'
     compile 'com.davemorrissey.labs:subsampling-scale-image-view:3.6.0'
     compile 'com.theartofdev.edmodo:android-image-cropper:2.4.0'
     compile 'com.bignerdranch.android:recyclerview-multiselect:0.2'

app/src/main/kotlin/com/simplemobiletools/gallery/App.kt

@@ -3,7 +3,9 @@ package com.simplemobiletools.gallery
 import android.app.Application
 import com.github.ajalt.reprint.core.Reprint
 import com.simplemobiletools.gallery.BuildConfig.USE_LEAK_CANARY
+import com.simplemobiletools.gallery.extensions.config
 import com.squareup.leakcanary.LeakCanary
+import java.util.*
 
 class App : Application() {
     override fun onCreate() {
@@ -15,6 +17,11 @@ class App : Application() {
             LeakCanary.install(this)
         }
 
+        if (config.useEnglish) {
+            val conf = resources.configuration
+            conf.locale = Locale.ENGLISH
+            resources.updateConfiguration(conf, resources.displayMetrics)
+        }
         Reprint.initialize(this)
     }
 }

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

@@ -53,6 +53,7 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
     private var mAllowPickingMultiple = false
     private var mIsThirdPartyIntent = false
     private var mIsGettingDirs = false
+    private var mStoredUseEnglish = false
     private var mStoredAnimateGifs = true
     private var mStoredCropThumbnails = true
     private var mStoredScrollHorizontally = true
@@ -124,6 +125,11 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
     override fun onResume() {
         super.onResume()
         config.isThirdPartyIntent = false
+        if (mStoredUseEnglish != config.useEnglish) {
+            restartActivity()
+            return
+        }
+
         if (mStoredAnimateGifs != config.animateGifs) {
             getDirectoryAdapter()?.updateAnimateGifs(config.animateGifs)
         }
@@ -175,6 +181,7 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
 
     private fun storeStateVariables() {
         config.apply {
+            mStoredUseEnglish = useEnglish
             mStoredAnimateGifs = animateGifs
             mStoredCropThumbnails = cropThumbnails
             mStoredScrollHorizontally = scrollHorizontally

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

@@ -50,6 +50,7 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
     private var mAllowPickingMultiple = false
     private var mShowAll = false
     private var mLoadedInitialPhotos = false
+    private var mStoredUseEnglish = false
     private var mStoredAnimateGifs = true
     private var mStoredCropThumbnails = true
     private var mStoredScrollHorizontally = true
@@ -86,6 +87,11 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
 
     override fun onResume() {
         super.onResume()
+        if (mStoredUseEnglish != config.useEnglish) {
+            restartActivity()
+            return
+        }
+
         if (mStoredAnimateGifs != config.animateGifs) {
             getMediaAdapter()?.updateAnimateGifs(config.animateGifs)
         }
@@ -131,6 +137,7 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
 
     private fun storeStateVariables() {
         config.apply {
+            mStoredUseEnglish = useEnglish
             mStoredAnimateGifs = animateGifs
             mStoredCropThumbnails = cropThumbnails
             mStoredScrollHorizontally = scrollHorizontally

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

@@ -9,6 +9,7 @@ import com.simplemobiletools.commons.dialogs.SecurityDialog
 import com.simplemobiletools.commons.extensions.beVisibleIf
 import com.simplemobiletools.commons.extensions.handleHiddenFolderPasswordProtection
 import com.simplemobiletools.commons.extensions.updateTextColors
+import com.simplemobiletools.commons.extensions.useEnglishToggled
 import com.simplemobiletools.commons.helpers.PROTECTION_FINGERPRINT
 import com.simplemobiletools.commons.helpers.SHOW_ALL_TABS
 import com.simplemobiletools.commons.models.RadioItem
@@ -19,6 +20,7 @@ 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
 import kotlinx.android.synthetic.main.activity_settings.*
+import java.util.*
 
 class SettingsActivity : SimpleActivity() {
     lateinit var res: Resources
@@ -33,6 +35,7 @@ class SettingsActivity : SimpleActivity() {
         super.onResume()
 
         setupCustomizeColors()
+        setupUseEnglish()
         setupManageIncludedFolders()
         setupManageExcludedFolders()
         setupShowHiddenFolders()
@@ -62,6 +65,16 @@ class SettingsActivity : SimpleActivity() {
         }
     }
 
+    private fun setupUseEnglish() {
+        settings_use_english_holder.beVisibleIf(Locale.getDefault().language != "en")
+        settings_use_english.isChecked = config.useEnglish
+        settings_use_english_holder.setOnClickListener {
+            settings_use_english.toggle()
+            config.useEnglish = settings_use_english.isChecked
+            useEnglishToggled()
+        }
+    }
+
     private fun setupManageIncludedFolders() {
         settings_manage_included_folders_holder.setOnClickListener {
             startActivity(Intent(this, IncludedFoldersActivity::class.java))

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

@@ -67,6 +67,8 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
     private var mSlideshowMedia = mutableListOf<Medium>()
     private var mAreSlideShowMediaVisible = false
 
+    private var mStoredUseEnglish = false
+
     companion object {
         var screenWidth = 0
         var screenHeight = 0
@@ -84,6 +86,8 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
                 finish()
             }
         }
+
+        storeStateVariables()
     }
 
     private fun initViewPager() {
@@ -202,6 +206,12 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
             finish()
             return
         }
+
+        if (mStoredUseEnglish != config.useEnglish) {
+            restartActivity()
+            return
+        }
+
         supportActionBar?.setBackgroundDrawable(resources.getDrawable(R.drawable.actionbar_gradient_background))
 
         if (config.maxBrightness) {
@@ -223,6 +233,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
         super.onPause()
         mOrientationEventListener?.disable()
         stopSlideshow()
+        storeStateVariables()
     }
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
@@ -274,6 +285,10 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
         return true
     }
 
+    private fun storeStateVariables() {
+        mStoredUseEnglish = config.useEnglish
+    }
+
     private fun updatePagerItems(media: MutableList<Medium>) {
         val pagerAdapter = MyPagerAdapter(this, supportFragmentManager, media)
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1 || !isDestroyed) {

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

@@ -68,6 +68,26 @@
 
         </RelativeLayout>
 
+        <RelativeLayout
+            android:id="@+id/settings_use_english_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_use_english"
+                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/use_english_language"/>
+
+        </RelativeLayout>
+
         <RelativeLayout
             android:id="@+id/settings_show_hidden_folders_holder"
             android:layout_width="match_parent"