Migrate to the AndroidX Shared Preferences.

- The version of the Shared Preferences bundled with the Android OS has been deprecated, similar to what has happened with other platform libraries. This is so that the libraries can be updated, regardless of the device's OS version.

app/build.gradle

@@ -62,8 +62,9 @@ android {
 }
 
 dependencies {
-    def lifecycle_version = "2.3.1"
     def arch_version = "2.1.0"
+    def lifecycle_version = "2.3.1"
+    def preference_version = "1.1.1"
     def room_version = "2.2.6"
     def rx_bindings_version = '3.0.0'
     def version_coroutine = '1.4.1'
@@ -75,6 +76,7 @@ dependencies {
     // AndroidX
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation "androidx.preference:preference-ktx:$preference_version"
     // Google
     implementation 'com.google.zxing:core:3.4.0'
     implementation 'com.google.code.gson:gson:2.8.6'

app/src/main/java/cy/agorise/bitsybitshareswallet/activities/ConnectedActivity.kt

@@ -4,12 +4,13 @@ import android.content.pm.PackageManager
 import android.os.AsyncTask
 import android.os.Bundle
 import android.os.Handler
-import android.preference.PreferenceManager
 import android.util.Log
 import android.widget.Toast
 import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.edit
 import androidx.core.content.pm.PackageInfoCompat
+import androidx.preference.PreferenceManager
 import com.google.firebase.crashlytics.FirebaseCrashlytics
 import cy.agorise.bitsybitshareswallet.database.entities.Balance
 import cy.agorise.bitsybitshareswallet.database.entities.Transfer
@@ -171,10 +172,9 @@ abstract class ConnectedActivity : AppCompatActivity() {
         if (versionCode > 11 && !hasPurgedEquivalentValues) {
             thread {
                 connectedActivityViewModel.purgeEquivalentValues()
-                PreferenceManager.getDefaultSharedPreferences(this)
+                PreferenceManager.getDefaultSharedPreferences(this).edit {
-                    .edit()
+                    putBoolean(Constants.KEY_HAS_PURGED_EQUIVALENT_VALUES, true)
-                    .putBoolean(Constants.KEY_HAS_PURGED_EQUIVALENT_VALUES, true)
+                }
-                    .apply()
             }
         }
     }
@@ -388,8 +388,9 @@ abstract class ConnectedActivity : AppCompatActivity() {
         dateFormat.timeZone = TimeZone.getTimeZone("GMT")
 
         try {
-            val date = dateFormat.parse(blockHeader.timestamp)
+            dateFormat.parse(blockHeader.timestamp)?.let { date ->
                 transferViewModel.setBlockTime(blockNumber, date.time / 1000)
+            }
         } catch (e: ParseException) {
             Log.e(TAG, "ParseException. Msg: " + e.message)
         }

app/src/main/java/cy/agorise/bitsybitshareswallet/activities/MainActivity.kt

@@ -2,7 +2,6 @@ package cy.agorise.bitsybitshareswallet.activities
 
 import android.os.Bundle
 import android.os.Handler
-import android.preference.PreferenceManager
 import android.util.Log
 import android.view.MenuItem
 import androidx.navigation.findNavController
@@ -11,6 +10,7 @@ import androidx.navigation.ui.AppBarConfiguration
 import androidx.navigation.ui.navigateUp
 import androidx.navigation.ui.onNavDestinationSelected
 import androidx.navigation.ui.setupActionBarWithNavController
+import androidx.preference.PreferenceManager
 import cy.agorise.bitsybitshareswallet.R
 import cy.agorise.bitsybitshareswallet.databinding.ActivityMainBinding
 import cy.agorise.bitsybitshareswallet.utils.Constants
@@ -36,6 +36,7 @@ class MainActivity : ConnectedActivity() {
         ) {
             setTheme(R.style.Theme_Bitsy_Dark)
         }
+
         binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
 

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/BaseAccountFragment.kt

@@ -1,7 +1,8 @@
 package cy.agorise.bitsybitshareswallet.fragments
 
-import android.preference.PreferenceManager
+import androidx.core.content.edit
 import androidx.navigation.fragment.findNavController
+import androidx.preference.PreferenceManager
 import cy.agorise.bitsybitshareswallet.R
 import cy.agorise.bitsybitshareswallet.activities.ConnectedActivity
 import cy.agorise.bitsybitshareswallet.database.entities.Authority
@@ -36,10 +37,11 @@ abstract class BaseAccountFragment : ConnectedFragment() {
         val hashedPIN = CryptoUtils.createSHA256Hash(salt + pin)
 
         // Stores the user selected PIN, hashed
-        PreferenceManager.getDefaultSharedPreferences(requireContext()).edit()
+        PreferenceManager.getDefaultSharedPreferences(requireContext()).edit {
-            .putString(Constants.KEY_HASHED_PIN_PATTERN, hashedPIN)
+            putString(Constants.KEY_HASHED_PIN_PATTERN, hashedPIN)
-            .putString(Constants.KEY_PIN_PATTERN_SALT, salt)
+            putString(Constants.KEY_PIN_PATTERN_SALT, salt)
-            .putInt(Constants.KEY_SECURITY_LOCK_SELECTED, 1).apply() // 1 -> PIN
+            putInt(Constants.KEY_SECURITY_LOCK_SELECTED, 1) // 1 -> PIN
+        }
 
         // Stores the accounts this key refers to
         val id = accountProperties.id

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/BaseSecurityLockDialog.kt

@@ -2,11 +2,12 @@ package cy.agorise.bitsybitshareswallet.fragments
 
 import android.os.Bundle
 import android.os.CountDownTimer
-import android.preference.PreferenceManager
 import android.view.View
 import android.view.ViewGroup
+import androidx.core.content.edit
 import androidx.fragment.app.DialogFragment
 import androidx.fragment.app.Fragment
+import androidx.preference.PreferenceManager
 import cy.agorise.bitsybitshareswallet.R
 import cy.agorise.bitsybitshareswallet.utils.Constants
 import io.reactivex.disposables.CompositeDisposable
@@ -118,10 +119,10 @@ abstract class BaseSecurityLockDialog : DialogFragment() {
 
         incorrectSecurityLockTime = now
 
-        PreferenceManager.getDefaultSharedPreferences(context).edit()
+        PreferenceManager.getDefaultSharedPreferences(context).edit {
-            .putInt(Constants.KEY_INCORRECT_SECURITY_LOCK_ATTEMPTS, ++incorrectSecurityLockAttempts)
+            putInt(Constants.KEY_INCORRECT_SECURITY_LOCK_ATTEMPTS, ++incorrectSecurityLockAttempts)
-            .putLong(Constants.KEY_INCORRECT_SECURITY_LOCK_TIME, now)
+            putLong(Constants.KEY_INCORRECT_SECURITY_LOCK_TIME, now)
-            .apply()
+        }
     }
 
     /**
@@ -132,10 +133,10 @@ abstract class BaseSecurityLockDialog : DialogFragment() {
         incorrectSecurityLockTime = 0
         incorrectSecurityLockAttempts = 0
 
-        PreferenceManager.getDefaultSharedPreferences(context).edit()
+        PreferenceManager.getDefaultSharedPreferences(context).edit {
-            .putInt(Constants.KEY_INCORRECT_SECURITY_LOCK_ATTEMPTS, incorrectSecurityLockAttempts)
+            putInt(Constants.KEY_INCORRECT_SECURITY_LOCK_ATTEMPTS, incorrectSecurityLockAttempts)
-            .putLong(Constants.KEY_INCORRECT_SECURITY_LOCK_TIME, incorrectSecurityLockTime)
+            putLong(Constants.KEY_INCORRECT_SECURITY_LOCK_TIME, incorrectSecurityLockTime)
-            .apply()
+        }
     }
 
     protected fun startContDownTimer() {

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/EReceiptFragment.kt

@@ -5,15 +5,15 @@ import android.content.Intent
 import android.content.pm.PackageManager
 import android.graphics.drawable.Animatable
 import android.os.Bundle
-import android.preference.PreferenceManager
-import android.text.Html
 import android.text.method.LinkMovementMethod
 import android.view.*
 import androidx.core.content.ContextCompat
 import androidx.core.os.ConfigurationCompat
+import androidx.core.text.HtmlCompat
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import androidx.navigation.fragment.navArgs
+import androidx.preference.PreferenceManager
 import com.google.firebase.crashlytics.FirebaseCrashlytics
 import cy.agorise.bitsybitshareswallet.R
 import cy.agorise.bitsybitshareswallet.database.joins.TransferDetail
@@ -130,12 +130,11 @@ class EReceiptFragment : Fragment() {
     /** Formats the transfer TextView to show a link to explore the given transfer
      * in a BitShares explorer */
     private fun formatTransferTextView(transferId: String) {
-        val tx = Html.fromHtml(
+        val html = getString(
-            getString(
             R.string.template__tx,
             "<a href=\"http://bitshares-explorer.io/#/operations/$transferId\">$transferId</a>"
         )
-        )
+        val tx = HtmlCompat.fromHtml(html, HtmlCompat.FROM_HTML_MODE_LEGACY)
         binding.tvTransferID.text = tx
         binding.tvTransferID.movementMethod = LinkMovementMethod.getInstance()
     }

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/HomeFragment.kt

@@ -1,7 +1,6 @@
 package cy.agorise.bitsybitshareswallet.fragments
 
 import android.os.Bundle
-import android.preference.PreferenceManager
 import android.view.*
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.Toolbar
@@ -13,6 +12,7 @@ import androidx.fragment.app.FragmentPagerAdapter
 import androidx.fragment.app.viewModels
 import androidx.navigation.Navigation
 import androidx.navigation.fragment.findNavController
+import androidx.preference.PreferenceManager
 import com.google.firebase.crashlytics.FirebaseCrashlytics
 import cy.agorise.bitsybitshareswallet.R
 import cy.agorise.bitsybitshareswallet.databinding.FragmentHomeBinding
@@ -135,7 +135,8 @@ class HomeFragment : Fragment() {
     /**
      * Pager adapter to create the placeholder fragments
      */
-    private inner class PagerAdapter(fm: FragmentManager) : FragmentPagerAdapter(fm) {
+    private inner class PagerAdapter(fm: FragmentManager) :
+        FragmentPagerAdapter(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT) {
 
         override fun getItem(position: Int): Fragment {
             // getItem is called to instantiate the fragment for the given page.

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/LicenseFragment.kt

@@ -1,13 +1,14 @@
 package cy.agorise.bitsybitshareswallet.fragments
 
 import android.os.Bundle
-import android.preference.PreferenceManager
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.appcompat.widget.Toolbar
+import androidx.core.content.edit
 import androidx.fragment.app.Fragment
 import androidx.navigation.fragment.findNavController
+import androidx.preference.PreferenceManager
 import com.google.firebase.crashlytics.FirebaseCrashlytics
 import cy.agorise.bitsybitshareswallet.R
 import cy.agorise.bitsybitshareswallet.databinding.FragmentLicenseBinding
@@ -67,9 +68,9 @@ class LicenseFragment : Fragment() {
      * sends the user to import/create account.
      */
     private fun agree() {
-        PreferenceManager.getDefaultSharedPreferences(context).edit()
+        PreferenceManager.getDefaultSharedPreferences(context).edit {
-            .putInt(Constants.KEY_LAST_AGREED_LICENSE_VERSION, Constants.CURRENT_LICENSE_VERSION)
+            putInt(Constants.KEY_LAST_AGREED_LICENSE_VERSION, Constants.CURRENT_LICENSE_VERSION)
-            .apply()
+        }
 
         findNavController().navigate(R.id.import_brainkey_action)
     }

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/MerchantsFragment.kt

@@ -6,7 +6,6 @@ import android.content.pm.PackageManager
 import android.database.Cursor
 import android.database.MatrixCursor
 import android.os.Bundle
-import android.preference.PreferenceManager
 import android.util.Log
 import android.view.*
 import android.widget.PopupWindow
@@ -19,6 +18,7 @@ import androidx.core.content.ContextCompat
 import androidx.cursoradapter.widget.SimpleCursorAdapter
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
+import androidx.preference.PreferenceManager
 import com.afollestad.materialdialogs.MaterialDialog
 import com.afollestad.materialdialogs.customview.customView
 import com.google.android.gms.maps.CameraUpdateFactory
@@ -549,7 +549,7 @@ class MerchantsFragment : Fragment(), OnMapReadyCallback, SearchView.OnSuggestio
             try {
                 mMap?.animateCamera(CameraUpdateFactory.newLatLngBounds(bounds, 100))
             } catch (e: Exception) {
-                Log.d(TAG, e.message)
+                Log.d(TAG, e.message ?: "")
             }
         }
         return true

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/PINSecurityLockDialog.kt

@@ -1,12 +1,13 @@
 package cy.agorise.bitsybitshareswallet.fragments
 
 import android.os.Bundle
-import android.preference.PreferenceManager
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.view.WindowManager
 import android.view.inputmethod.EditorInfo
+import androidx.core.content.edit
+import androidx.preference.PreferenceManager
 import com.google.firebase.crashlytics.FirebaseCrashlytics
 import com.jakewharton.rxbinding3.widget.textChanges
 import cy.agorise.bitsybitshareswallet.R
@@ -100,10 +101,11 @@ class PINSecurityLockDialog : BaseSecurityLockDialog() {
                         val hashedPIN = CryptoUtils.createSHA256Hash(salt + pinConfirm)
 
                         // Stores the newly selected PIN, hashed
-                        PreferenceManager.getDefaultSharedPreferences(v.context).edit()
+                        PreferenceManager.getDefaultSharedPreferences(v.context).edit {
-                            .putString(Constants.KEY_HASHED_PIN_PATTERN, hashedPIN)
+                            putString(Constants.KEY_HASHED_PIN_PATTERN, hashedPIN)
-                            .putString(Constants.KEY_PIN_PATTERN_SALT, salt)
+                            putString(Constants.KEY_PIN_PATTERN_SALT, salt)
-                            .putInt(Constants.KEY_SECURITY_LOCK_SELECTED, 1).apply() // 1 -> PIN
+                            putInt(Constants.KEY_SECURITY_LOCK_SELECTED, 1) // 1 -> PIN
+                        }
 
                         dismiss()
                         mCallback?.onPINPatternChanged()

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/PatternSecurityLockDialog.kt

@@ -1,10 +1,11 @@
 package cy.agorise.bitsybitshareswallet.fragments
 
 import android.os.Bundle
-import android.preference.PreferenceManager
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.core.content.edit
+import androidx.preference.PreferenceManager
 import com.andrognito.patternlockview.PatternLockView
 import com.andrognito.patternlockview.listener.PatternLockViewListener
 import com.google.firebase.crashlytics.FirebaseCrashlytics
@@ -131,11 +132,11 @@ class PatternSecurityLockDialog : BaseSecurityLockDialog() {
                             val hashedPattern = CryptoUtils.createSHA256Hash(salt + patternConfirm)
 
                             // Stores the newly selected Pattern, encrypted
-                            PreferenceManager.getDefaultSharedPreferences(it).edit()
+                            PreferenceManager.getDefaultSharedPreferences(it).edit {
-                                .putString(Constants.KEY_HASHED_PIN_PATTERN, hashedPattern)
+                                putString(Constants.KEY_HASHED_PIN_PATTERN, hashedPattern)
-                                .putString(Constants.KEY_PIN_PATTERN_SALT, salt)
+                                putString(Constants.KEY_PIN_PATTERN_SALT, salt)
-                                .putInt(Constants.KEY_SECURITY_LOCK_SELECTED, 2)
+                                putInt(Constants.KEY_SECURITY_LOCK_SELECTED, 2) // 2 -> Pattern
-                                .apply() // 2 -> Pattern
+                            }
 
                             dismiss()
                             mCallback?.onPINPatternChanged()

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/ReceiveTransactionFragment.kt

@@ -4,7 +4,6 @@ import android.content.Intent
 import android.content.pm.PackageManager
 import android.graphics.drawable.Animatable
 import android.os.Bundle
-import android.preference.PreferenceManager
 import android.util.Log
 import android.view.*
 import android.widget.AdapterView
@@ -12,6 +11,7 @@ import androidx.appcompat.widget.Toolbar
 import androidx.collection.LongSparseArray
 import androidx.core.content.ContextCompat
 import androidx.fragment.app.viewModels
+import androidx.preference.PreferenceManager
 import com.google.common.primitives.UnsignedLong
 import com.google.firebase.crashlytics.FirebaseCrashlytics
 import com.jakewharton.rxbinding3.widget.textChanges
@@ -136,9 +136,7 @@ class ReceiveTransactionFragment : ConnectedFragment() {
                     )
                 )
 
-            mAssets.sortWith(
+            mAssets.sortWith { a, b -> a.toString().compareTo(b.toString(), true) }
-                Comparator { a, b -> a.toString().compareTo(b.toString(), true) }
-            )
 
             // Add an option at the end so the user can search for an asset other than the ones saved in the db
             val asset = cy.agorise.bitsybitshareswallet.database.entities.Asset(
@@ -208,7 +206,7 @@ class ReceiveTransactionFragment : ConnectedFragment() {
             binding.actvAsset.textChanges()
                 .skipInitialValue()
                 .debounce(500, TimeUnit.MILLISECONDS)
-                .map { it.toString().trim().toUpperCase() }
+                .map { it.toString().trim().toUpperCase(Locale.getDefault()) }
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe({
                     if (!selectedInAutoCompleteTextView) {

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/SendTransactionFragment.kt

@@ -3,7 +3,6 @@ package cy.agorise.bitsybitshareswallet.fragments
 import android.content.pm.PackageManager
 import android.os.Bundle
 import android.os.Handler
-import android.preference.PreferenceManager
 import android.provider.Settings
 import android.util.Log
 import android.view.*
@@ -15,6 +14,7 @@ import androidx.core.content.ContextCompat
 import androidx.fragment.app.viewModels
 import androidx.navigation.fragment.findNavController
 import androidx.navigation.fragment.navArgs
+import androidx.preference.PreferenceManager
 import com.afollestad.materialdialogs.MaterialDialog
 import com.afollestad.materialdialogs.customview.customView
 import com.google.android.material.snackbar.Snackbar
@@ -52,7 +52,6 @@ import java.text.DecimalFormatSymbols
 import java.util.ArrayList
 import java.util.Locale
 import java.util.concurrent.TimeUnit
-import kotlin.Comparator
 
 class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHandler,
     BaseSecurityLockDialog.OnPINPatternEnteredListener {
@@ -186,9 +185,7 @@ class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHand
         balanceDetailViewModel.getAll().observe(viewLifecycleOwner, { balancesDetails ->
             mBalancesDetails.clear()
             mBalancesDetails.addAll(balancesDetails)
-            mBalancesDetails.sortWith(
+            mBalancesDetails.sortWith { a, b -> a.toString().compareTo(b.toString(), true) }
-                Comparator { a, b -> a.toString().compareTo(b.toString(), true) }
-            )
             mBalancesDetailsAdapter = BalancesDetailsAdapter(
                 requireContext(),
                 android.R.layout.simple_spinner_item,
@@ -461,9 +458,11 @@ class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHand
 
             // Try to select the invoice's Asset in the Assets spinner
             for (i in 0 until (mBalancesDetailsAdapter?.count ?: 0)) {
-                if (mBalancesDetailsAdapter?.getItem(i)?.symbol == invoice.currency.toUpperCase() ||
+                if (mBalancesDetailsAdapter?.getItem(i)?.symbol == invoice.currency
+                        .toUpperCase(Locale.getDefault()) ||
                     (invoice.currency.startsWith("bit", true) &&
-                            invoice.currency.replaceFirst("bit", "").toUpperCase() ==
+                            invoice.currency.replaceFirst("bit", "")
+                                .toUpperCase(Locale.getDefault()) ==
                             mBalancesDetailsAdapter?.getItem(i)?.symbol)
                 ) {
                     binding.spAsset.setSelection(i)
@@ -477,7 +476,10 @@ class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHand
             if (balanceDetail == null) {
                 Snackbar.make(
                     binding.rootView,
-                    getString(R.string.error__you_dont_own_asset, invoice.currency.toUpperCase()),
+                    getString(
+                        R.string.error__you_dont_own_asset,
+                        invoice.currency.toUpperCase(Locale.getDefault())
+                    ),
                     Snackbar.LENGTH_INDEFINITE
                 ).setAction(android.R.string.ok) { }.show()
                 return

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/SettingsFragment.kt

@@ -3,15 +3,16 @@ package cy.agorise.bitsybitshareswallet.fragments
 import android.content.Context
 import android.os.Bundle
 import android.os.Handler
-import android.preference.PreferenceManager
 import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.appcompat.widget.Toolbar
 import androidx.collection.LongSparseArray
+import androidx.core.content.edit
 import androidx.core.content.res.ResourcesCompat
 import androidx.fragment.app.viewModels
+import androidx.preference.PreferenceManager
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.afollestad.materialdialogs.MaterialDialog
 import com.afollestad.materialdialogs.callbacks.onDismiss
@@ -485,9 +486,9 @@ class SettingsFragment : ConnectedFragment(), BaseSecurityLockDialog.OnPINPatter
 
                     when (index) {
                         0 -> { /* None */
-                            PreferenceManager.getDefaultSharedPreferences(context).edit()
+                            PreferenceManager.getDefaultSharedPreferences(context).edit {
-                                .putInt(Constants.KEY_SECURITY_LOCK_SELECTED, 0)
+                                putInt(Constants.KEY_SECURITY_LOCK_SELECTED, 0) // 0 -> None
-                                .apply() // 0 -> None
+                            }
 
                             // Call this function to update the UI
                             onPINPatternChanged()
@@ -564,8 +565,9 @@ class SettingsFragment : ConnectedFragment(), BaseSecurityLockDialog.OnPINPatter
                 .cancelable(false)
                 .positiveButton(R.string.button__copied) {
                     val now = System.currentTimeMillis()
-                    PreferenceManager.getDefaultSharedPreferences(it.context).edit()
+                    PreferenceManager.getDefaultSharedPreferences(it.context).edit {
-                        .putLong(Constants.KEY_LAST_ACCOUNT_BACKUP, now).apply()
+                        putLong(Constants.KEY_LAST_ACCOUNT_BACKUP, now)
+                    }
                     binding.tvBackupWarning.visibility = View.GONE
                 }
 
@@ -623,14 +625,12 @@ class SettingsFragment : ConnectedFragment(), BaseSecurityLockDialog.OnPINPatter
         // Clears the database.
         viewModel.clearDatabase(context)
 
+        val pref = PreferenceManager.getDefaultSharedPreferences(context).edit {
             // Clears the shared preferences.
-        val pref = PreferenceManager.getDefaultSharedPreferences(context)
+            clear()
-        pref.edit().clear().apply()
-
             // Marks the license as agreed, so that it is not shown to the user again.
-        pref.edit().putInt(
+            putInt(Constants.KEY_LAST_AGREED_LICENSE_VERSION, Constants.CURRENT_LICENSE_VERSION)
-            Constants.KEY_LAST_AGREED_LICENSE_VERSION, Constants.CURRENT_LICENSE_VERSION
+        }
-        ).apply()
 
         // Restarts the activity, which will restart the whole application since it uses a
         // single activity architecture.
@@ -639,4 +639,3 @@ class SettingsFragment : ConnectedFragment(), BaseSecurityLockDialog.OnPINPatter
         activity?.startActivity(intent)
     }
 }
-

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/TransactionsFragment.kt

@@ -5,13 +5,13 @@ import android.content.pm.PackageManager
 import android.graphics.Point
 import android.os.Bundle
 import android.os.Environment
-import android.preference.PreferenceManager
 import android.view.*
 import androidx.appcompat.widget.SearchView
 import androidx.core.content.ContextCompat
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentActivity
 import androidx.fragment.app.viewModels
+import androidx.preference.PreferenceManager
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.afollestad.materialdialogs.MaterialDialog
 import com.afollestad.materialdialogs.list.listItemsMultiChoice
@@ -26,6 +26,7 @@ import cy.agorise.bitsybitshareswallet.viewmodels.TransactionsViewModel
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.disposables.CompositeDisposable
 import java.io.File
+import java.util.*
 import java.util.concurrent.TimeUnit
 
 /**
@@ -110,7 +111,7 @@ class TransactionsFragment : Fragment(), FilterOptionsDialog.OnFilterOptionsSele
             searchView.queryTextChangeEvents()
                 .skipInitialValue()
                 .debounce(500, TimeUnit.MILLISECONDS)
-                .map { it.queryText.toString().toLowerCase() }
+                .map { it.queryText.toString().toLowerCase(Locale.getDefault()) }
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe {
                     viewModel.setFilterQuery(it)

app/src/main/java/cy/agorise/bitsybitshareswallet/processors/TransfersLoader.kt

@@ -1,8 +1,8 @@
 package cy.agorise.bitsybitshareswallet.processors
 
 import android.content.Context
-import android.preference.PreferenceManager
 import android.util.Log
+import androidx.preference.PreferenceManager
 import cy.agorise.bitsybitshareswallet.database.entities.Transfer
 import cy.agorise.bitsybitshareswallet.models.HistoricalOperationEntry
 import cy.agorise.bitsybitshareswallet.repositories.AuthorityRepository
@@ -75,8 +75,8 @@ class TransfersLoader(private var mContext: Context?) {
         transferRepository = TransferRepository(mContext!!)
         authorityRepository = AuthorityRepository(mContext!!)
 
-        val pref = PreferenceManager.getDefaultSharedPreferences(mContext)
+        val userId = PreferenceManager.getDefaultSharedPreferences(mContext)
-        val userId = pref.getString(Constants.KEY_CURRENT_ACCOUNT_ID, "") ?: ""
+            .getString(Constants.KEY_CURRENT_ACCOUNT_ID, "") ?: ""
         if (userId != "") {
             mCurrentAccount = UserAccount(userId)
             mDisposables.add(

app/src/main/java/cy/agorise/bitsybitshareswallet/repositories/MerchantRepository.kt

@@ -2,9 +2,10 @@ package cy.agorise.bitsybitshareswallet.repositories
 
 import android.content.Context
 import android.os.AsyncTask
-import android.preference.PreferenceManager
 import android.util.Log
+import androidx.core.content.edit
 import androidx.lifecycle.LiveData
+import androidx.preference.PreferenceManager
 import cy.agorise.bitsybitshareswallet.database.BitsyDatabase
 import cy.agorise.bitsybitshareswallet.database.daos.MerchantDao
 import cy.agorise.bitsybitshareswallet.database.entities.Merchant
@@ -41,7 +42,7 @@ class MerchantRepository internal constructor(val context: Context) : retrofit2.
             .addConverterFactory(GsonConverterFactory.create())
             .build()
 
-        bitsyWebservice = retrofit.create<BitsyWebservice>(BitsyWebservice::class.java)
+        bitsyWebservice = retrofit.create(BitsyWebservice::class.java)
     }
 
     /** Returns a LiveData object directly from the database while the response from the WebService is obtained. */
@@ -79,8 +80,9 @@ class MerchantRepository internal constructor(val context: Context) : retrofit2.
                 updateMerchants(merchantsList)
 
                 val now = System.currentTimeMillis()
-                PreferenceManager.getDefaultSharedPreferences(context).edit()
+                PreferenceManager.getDefaultSharedPreferences(context).edit {
-                    .putLong(Constants.KEY_MERCHANTS_LAST_UPDATE, now).apply()
+                    putLong(Constants.KEY_MERCHANTS_LAST_UPDATE, now)
+                }
             }
         }
     }

app/src/main/java/cy/agorise/bitsybitshareswallet/repositories/TellerRepository.kt

@@ -2,9 +2,10 @@ package cy.agorise.bitsybitshareswallet.repositories
 
 import android.content.Context
 import android.os.AsyncTask
-import android.preference.PreferenceManager
 import android.util.Log
+import androidx.core.content.edit
 import androidx.lifecycle.LiveData
+import androidx.preference.PreferenceManager
 import cy.agorise.bitsybitshareswallet.database.BitsyDatabase
 import cy.agorise.bitsybitshareswallet.database.daos.TellerDao
 import cy.agorise.bitsybitshareswallet.database.entities.Teller
@@ -79,8 +80,9 @@ class TellerRepository internal constructor(val context: Context) : retrofit2.Ca
                 updateTellers(tellersList)
 
                 val now = System.currentTimeMillis()
-                PreferenceManager.getDefaultSharedPreferences(context).edit()
+                PreferenceManager.getDefaultSharedPreferences(context).edit {
-                    .putLong(Constants.KEY_TELLERS_LAST_UPDATE, now).apply()
+                    putLong(Constants.KEY_TELLERS_LAST_UPDATE, now).apply()
+                }
             }
         }
     }

app/src/main/java/cy/agorise/bitsybitshareswallet/repositories/TransferRepository.kt

@@ -1,9 +1,7 @@
 package cy.agorise.bitsybitshareswallet.repositories
 
 import android.content.Context
-import android.content.SharedPreferences
 import android.os.AsyncTask
-import android.preference.PreferenceManager
 import android.util.Log
 import androidx.lifecycle.LiveData
 import cy.agorise.bitsybitshareswallet.database.BitsyDatabase
@@ -27,13 +25,11 @@ class TransferRepository internal constructor(context: Context) {
     private val mTransferDao: TransferDao
     private val mEquivalentValuesDao: EquivalentValueDao
     private val compositeDisposable = CompositeDisposable()
-    private val mPreferences: SharedPreferences
 
     init {
         val db = BitsyDatabase.getDatabase(context)
         mTransferDao = db!!.transferDao()
         mEquivalentValuesDao = db.equivalentValueDao()
-        mPreferences = PreferenceManager.getDefaultSharedPreferences(context)
     }
 
     fun insertAll(transfers: List<Transfer>) {
@@ -84,9 +80,15 @@ class TransferRepository internal constructor(context: Context) {
             .subscribe({
                 if (it.value >= 0) mEquivalentValuesDao.insert(it)
             }, {
-                Log.e(TAG,"Error while trying to create a new equivalent value. Msg: ${it.message}")
+                Log.e(
+                    TAG,
+                    "Error while trying to create a new equivalent value. Msg: ${it.message}"
+                )
                 for (element in it.stackTrace) {
-                    Log.e(TAG,"${element.className}#${element.methodName}:${element.lineNumber}")
+                    Log.e(
+                        TAG,
+                        "${element.className}#${element.methodName}:${element.lineNumber}"
+                    )
                 }
             })
         )
@@ -111,13 +113,16 @@ class TransferRepository internal constructor(context: Context) {
             ?.execute()
         var equivalentFiatValue = -1L
         if (response?.isSuccessful == true) {
-            val price: Double = response.body()?.market_data?.current_price?.get(symbol.toLowerCase()) ?: -1.0
+            val price: Double = response.body()?.market_data?.current_price
+                ?.get(symbol.toLowerCase(Locale.getDefault())) ?: -1.0
             if (price > 0) {
                 // The equivalent value is obtained by:
                 // 1- Dividing the base value by 100000 (BTS native precision)
                 // 2- Multiplying that BTS value by the unit price in the chosen fiat
                 // 3- Multiplying the resulting value by 100 in order to express it in cents
-                equivalentFiatValue = Math.round(transfer.btsValue?.toFloat()?.div(1e5)?.times(price)?.times(100) ?: -1.0)
+                equivalentFiatValue = Math.round(
+                    transfer.btsValue?.toFloat()?.div(1e5)?.times(price)?.times(100) ?: -1.0
+                )
             }
         } else {
             Log.w(TAG, "Request was not successful. code: ${response?.code()}")

app/src/main/java/cy/agorise/bitsybitshareswallet/utils/CryptoUtils.kt

@@ -1,8 +1,9 @@
 package cy.agorise.bitsybitshareswallet.utils
 
 import android.content.Context
-import android.preference.PreferenceManager
 import android.util.Base64
+import androidx.core.content.edit
+import androidx.preference.PreferenceManager
 
 import com.moldedbits.r2d2.R2d2
 import java.security.MessageDigest
@@ -32,11 +33,9 @@ object CryptoUtils {
     fun put(context: Context, key: String, value: String) {
         val r2d2 = R2d2(context)
         val encrypted = r2d2.encryptData(value)
-        PreferenceManager
+        PreferenceManager.getDefaultSharedPreferences(context).edit {
-            .getDefaultSharedPreferences(context)
+                putString(key, encrypted)
-            .edit()
+            }
-            .putString(key, encrypted)
-            .apply()
     }
 
     /**