diff --git a/ShoppingList/build.gradle b/ShoppingList/build.gradle
index f848a98..e5f05aa 100644
--- a/ShoppingList/build.gradle
+++ b/ShoppingList/build.gradle
@@ -17,7 +17,7 @@ android {
         targetSdkVersion rootProject.ext.targetSdkVersion
 
         testApplicationId "org.openintents.shopping.test"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         setProperty("archivesBaseName", "$applicationId-$versionName")
     }
 
@@ -76,17 +76,12 @@ dependencies {
 
     implementation project(':ShoppingListLibrary')
     implementation 'com.github.openintents:distribution:3.0.2'
-    implementation "com.android.support:appcompat-v7:$rootProject.ext.supportVersion"
-    implementation "com.android.support:design:$rootProject.ext.supportVersion"
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.3.0'
     androidTestImplementation 'junit:junit:4.13'
-    androidTestImplementation 'com.android.support.test:runner:1.0.2'
-    androidTestImplementation 'com.android.support.test:rules:1.0.2'
-    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
-    androidTestImplementation 'com.android.support.test.espresso:espresso-contrib:3.0.2'
-    androidTestImplementation "com.android.support:support-annotations:$rootProject.ext.supportVersion"
-    androidTestImplementation "com.android.support:recyclerview-v7:$rootProject.ext.supportVersion"
-    androidTestImplementation "com.android.support:appcompat-v7:$rootProject.ext.supportVersion"
-    androidTestImplementation "com.android.support:support-v4:$rootProject.ext.supportVersion"
-    androidTestImplementation "com.android.support:design:$rootProject.ext.supportVersion"
+    androidTestImplementation group: 'androidx.test', name: 'runner', version: '1.3.0'
+    androidTestImplementation group: 'androidx.test', name: 'rules', version: '1.3.0'
+    androidTestImplementation group: 'androidx.test.espresso', name: 'espresso-core', version: '3.3.0'
+    androidTestImplementation group: 'androidx.test.espresso', name: 'espresso-contrib', version: '3.3.0'
 
 }
diff --git a/ShoppingList/src/androidTest/java/org/openintents/shopping/test/test/ShoppingActivityInsertByIntentTest.java b/ShoppingList/src/androidTest/java/org/openintents/shopping/test/test/ShoppingActivityInsertByIntentTest.java
index 2e7b478..713d261 100644
--- a/ShoppingList/src/androidTest/java/org/openintents/shopping/test/test/ShoppingActivityInsertByIntentTest.java
+++ b/ShoppingList/src/androidTest/java/org/openintents/shopping/test/test/ShoppingActivityInsertByIntentTest.java
@@ -4,9 +4,10 @@
 import android.content.SharedPreferences;
 import android.net.Uri;
 import android.preference.PreferenceManager;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.espresso.matcher.RootMatchers;
-import android.support.test.rule.ActivityTestRule;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.espresso.matcher.RootMatchers;
+import androidx.test.rule.ActivityTestRule;
 
 import org.junit.Before;
 import org.junit.Rule;
@@ -21,12 +22,12 @@
 import java.util.ArrayList;
 import java.util.Random;
 
-import static android.support.test.espresso.Espresso.onData;
-import static android.support.test.espresso.Espresso.onView;
-import static android.support.test.espresso.action.ViewActions.typeText;
-import static android.support.test.espresso.assertion.ViewAssertions.matches;
-import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;
-import static android.support.test.espresso.matcher.ViewMatchers.withId;
+import static androidx.test.espresso.Espresso.onData;
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.action.ViewActions.typeText;
+import static androidx.test.espresso.assertion.ViewAssertions.matches;
+import static androidx.test.espresso.matcher.ViewMatchers.isDisplayed;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
 import static org.hamcrest.Matchers.is;
 import static org.hamcrest.Matchers.not;
 
diff --git a/ShoppingList/src/androidTest/java/org/openintents/shopping/test/test/ShoppingActivityTest.java b/ShoppingList/src/androidTest/java/org/openintents/shopping/test/test/ShoppingActivityTest.java
index 6a7f504..b289d55 100644
--- a/ShoppingList/src/androidTest/java/org/openintents/shopping/test/test/ShoppingActivityTest.java
+++ b/ShoppingList/src/androidTest/java/org/openintents/shopping/test/test/ShoppingActivityTest.java
@@ -4,17 +4,18 @@
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.espresso.UiController;
-import android.support.test.espresso.ViewAction;
-import android.support.test.espresso.contrib.DrawerActions;
-import android.support.test.rule.ActivityTestRule;
-import android.support.v7.widget.ActionBarContainer;
 import android.view.View;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.Adapter;
 import android.widget.AdapterView;
 
+import androidx.appcompat.widget.ActionBarContainer;
+import androidx.test.InstrumentationRegistry;
+import androidx.test.espresso.UiController;
+import androidx.test.espresso.ViewAction;
+import androidx.test.espresso.contrib.DrawerActions;
+import androidx.test.rule.ActivityTestRule;
+
 import org.hamcrest.Description;
 import org.hamcrest.Matcher;
 import org.hamcrest.TypeSafeMatcher;
@@ -30,21 +31,21 @@
 import java.util.Random;
 import java.util.concurrent.TimeUnit;
 
-import static android.support.test.espresso.Espresso.onData;
-import static android.support.test.espresso.Espresso.onView;
-import static android.support.test.espresso.Espresso.openContextualActionModeOverflowMenu;
-import static android.support.test.espresso.action.ViewActions.click;
-import static android.support.test.espresso.action.ViewActions.longClick;
-import static android.support.test.espresso.action.ViewActions.replaceText;
-import static android.support.test.espresso.action.ViewActions.typeText;
-import static android.support.test.espresso.assertion.ViewAssertions.matches;
-import static android.support.test.espresso.matcher.CursorMatchers.withRowString;
-import static android.support.test.espresso.matcher.ViewMatchers.isAssignableFrom;
-import static android.support.test.espresso.matcher.ViewMatchers.isDescendantOfA;
-import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;
-import static android.support.test.espresso.matcher.ViewMatchers.isRoot;
-import static android.support.test.espresso.matcher.ViewMatchers.withId;
-import static android.support.test.espresso.matcher.ViewMatchers.withText;
+import static androidx.test.espresso.Espresso.onData;
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.Espresso.openContextualActionModeOverflowMenu;
+import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.action.ViewActions.longClick;
+import static androidx.test.espresso.action.ViewActions.replaceText;
+import static androidx.test.espresso.action.ViewActions.typeText;
+import static androidx.test.espresso.assertion.ViewAssertions.matches;
+import static androidx.test.espresso.matcher.CursorMatchers.withRowString;
+import static androidx.test.espresso.matcher.ViewMatchers.isAssignableFrom;
+import static androidx.test.espresso.matcher.ViewMatchers.isDescendantOfA;
+import static androidx.test.espresso.matcher.ViewMatchers.isDisplayed;
+import static androidx.test.espresso.matcher.ViewMatchers.isRoot;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
+import static androidx.test.espresso.matcher.ViewMatchers.withText;
 import static org.hamcrest.Matchers.allOf;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.hasEntry;
diff --git a/ShoppingList/src/main/java/org/openintents/convertcsv/common/ConvertCsvBaseActivity.java b/ShoppingList/src/main/java/org/openintents/convertcsv/common/ConvertCsvBaseActivity.java
index 78aa05c..07fe18d 100644
--- a/ShoppingList/src/main/java/org/openintents/convertcsv/common/ConvertCsvBaseActivity.java
+++ b/ShoppingList/src/main/java/org/openintents/convertcsv/common/ConvertCsvBaseActivity.java
@@ -24,7 +24,6 @@
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.SharedPreferences.Editor;
-import android.content.pm.PackageManager;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
@@ -33,8 +32,6 @@
 import android.os.ParcelFileDescriptor;
 import android.preference.PreferenceManager;
 import android.provider.OpenableColumns;
-import android.support.v4.content.ContextCompat;
-import android.support.v7.app.AppCompatActivity;
 import android.text.TextUtils;
 import android.util.Log;
 import android.util.Xml.Encoding;
@@ -52,6 +49,8 @@
 import android.widget.Spinner;
 import android.widget.TextView;
 
+import androidx.appcompat.app.AppCompatActivity;
+
 import org.openintents.convertcsv.PreferenceActivity;
 import org.openintents.distribution.DownloadOIAppDialog;
 import org.openintents.shopping.R;
diff --git a/ShoppingList/src/main/java/org/openintents/distribution/DistributionLibraryFragmentActivity.java b/ShoppingList/src/main/java/org/openintents/distribution/DistributionLibraryFragmentActivity.java
index 4d8882b..aa1c07c 100644
--- a/ShoppingList/src/main/java/org/openintents/distribution/DistributionLibraryFragmentActivity.java
+++ b/ShoppingList/src/main/java/org/openintents/distribution/DistributionLibraryFragmentActivity.java
@@ -2,10 +2,11 @@
 
 import android.app.Dialog;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
 import android.view.Menu;
 import android.view.MenuItem;
 
+import androidx.appcompat.app.AppCompatActivity;
+
 //public class DistributionLibraryActivity extends Activity {//Temp - FragmentActivity for 3.x compatibility
 public class DistributionLibraryFragmentActivity extends AppCompatActivity {
 
diff --git a/ShoppingList/src/main/java/org/openintents/shopping/ui/LayoutChoiceActivity.java b/ShoppingList/src/main/java/org/openintents/shopping/ui/LayoutChoiceActivity.java
index 7f25907..eb35d11 100644
--- a/ShoppingList/src/main/java/org/openintents/shopping/ui/LayoutChoiceActivity.java
+++ b/ShoppingList/src/main/java/org/openintents/shopping/ui/LayoutChoiceActivity.java
@@ -3,13 +3,14 @@
 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.annotation.IdRes;
-import android.support.annotation.Nullable;
-import android.support.v7.app.AppCompatActivity;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.RadioGroup;
 
+import androidx.annotation.IdRes;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+
 import org.openintents.shopping.R;
 
 public class LayoutChoiceActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener {
diff --git a/ShoppingList/src/main/java/org/openintents/shopping/ui/ShoppingActivity.java b/ShoppingList/src/main/java/org/openintents/shopping/ui/ShoppingActivity.java
index 8fa2d9d..db04190 100644
--- a/ShoppingList/src/main/java/org/openintents/shopping/ui/ShoppingActivity.java
+++ b/ShoppingList/src/main/java/org/openintents/shopping/ui/ShoppingActivity.java
@@ -39,15 +39,9 @@
 import android.hardware.SensorManager;
 import android.net.Uri;
 import android.os.AsyncTask;
-import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
-import android.support.design.widget.Snackbar;
-import android.support.v4.view.ActionProvider;
-import android.support.v4.view.MenuItemCompat;
-import android.support.v4.widget.DrawerLayout;
-import android.support.v7.app.ActionBarDrawerToggle;
 import android.text.Editable;
 import android.text.TextUtils;
 import android.text.TextWatcher;
@@ -86,6 +80,13 @@
 import android.widget.Toast;
 import android.widget.WrapperListAdapter;
 
+import androidx.appcompat.app.ActionBarDrawerToggle;
+import androidx.core.view.ActionProvider;
+import androidx.core.view.MenuItemCompat;
+import androidx.drawerlayout.widget.DrawerLayout;
+
+import com.google.android.material.snackbar.Snackbar;
+
 import org.openintents.OpenIntents;
 import org.openintents.convertcsv.shoppinglist.ConvertCsvActivity;
 import org.openintents.distribution.DistributionLibraryFragmentActivity;
@@ -129,6 +130,8 @@
 import java.util.LinkedList;
 import java.util.List;
 
+import static org.openintents.shopping.ui.PreferenceActivity.PREFS_HIDECHECKED;
+import static org.openintents.shopping.ui.PreferenceActivity.PREFS_HIDECHECKED_DEFAULT;
 import static org.openintents.shopping.ui.widget.ShoppingItemsView.MODE_IN_SHOP;
 
 /**
@@ -1530,14 +1533,14 @@ public boolean onCreateOptionsMenu(Menu menu) {
         View searchView = mItemsView.getSearchView();
         if (searchView != null) {
             item = menu.add(0, MENU_SEARCH_ADD, 0, R.string.menu_search_add);
-            MenuItemCompat.setActionView(item, searchView);
-            MenuItemCompat.setShowAsAction(item, MenuItem.SHOW_AS_ACTION_ALWAYS);
+            item.setActionView(searchView);
+            item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
         }
         mAddPanel.setVisibility(searchView == null ? View.VISIBLE : View.GONE);
 
         item = menu.add(0, MENU_SORT_LIST, 0, R.string.menu_sort_list)
                 .setIcon(android.R.drawable.ic_menu_sort_alphabetically);
-        MenuItemCompat.setShowAsAction(item, MenuItem.SHOW_AS_ACTION_IF_ROOM
+        item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM
                 | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
         if (mListSortActionProvider == null) {
             mListSortActionProvider = new ListSortActionProvider(this);
@@ -1553,8 +1556,7 @@ public boolean onCreateOptionsMenu(Menu menu) {
 
         item = menu.add(0, MENU_CLEAN_UP_LIST, 0, R.string.clean_up_list)
                 .setIcon(R.drawable.ic_menu_cleanup).setShortcut('1', 'c');
-        MenuItemCompat.setShowAsAction(item, MenuItem.SHOW_AS_ACTION_IF_ROOM
-                | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
 
         menu.add(0, MENU_PICK_ITEMS, 0, R.string.menu_pick_items)
                 .setIcon(android.R.drawable.ic_menu_add).setShortcut('2', 'p').
@@ -1695,9 +1697,14 @@ public boolean onPrepareOptionsMenu(Menu menu) {
         menu.findItem(MENU_MARK_ALL_ITEMS).setVisible(mItemsView.mNumUnchecked > 0);
         menu.findItem(MENU_UNMARK_ALL_ITEMS).setVisible(mItemsView.mNumChecked > 0);
 
-        menu.findItem(MENU_CLEAN_UP_LIST).setEnabled(
-                mItemsView.mNumChecked > 0).setVisible(!drawerOpen);
-
+        // Show clean_up_list menu action only if setting "Hide checked items" is set to false
+        // as clean_up_list menu item would unexpected work on already hidden items
+        SharedPreferences sp = getSharedPreferences("org.openintents.shopping_preferences", MODE_PRIVATE);
+        if (sp.getBoolean(PREFS_HIDECHECKED, PREFS_HIDECHECKED_DEFAULT)) {
+            menu.findItem(MENU_CLEAN_UP_LIST).setVisible(false);
+        } else {
+            menu.findItem(MENU_CLEAN_UP_LIST).setEnabled(mItemsView.mNumChecked > 0).setVisible(!drawerOpen);
+        }
 
         // Delete list is possible, if we have more than one list:
         // AND
diff --git a/ShoppingList/src/main/java/org/openintents/shopping/ui/widget/QuickSelectMenu.java b/ShoppingList/src/main/java/org/openintents/shopping/ui/widget/QuickSelectMenu.java
index 08074ff..aa90f09 100644
--- a/ShoppingList/src/main/java/org/openintents/shopping/ui/widget/QuickSelectMenu.java
+++ b/ShoppingList/src/main/java/org/openintents/shopping/ui/widget/QuickSelectMenu.java
@@ -5,19 +5,21 @@
 import android.view.MenuItem;
 import android.view.View;
 
+import androidx.appcompat.widget.PopupMenu;
+
 /* This class exposes a subset of PopupMenu functionality, and chooses whether
  * to use the platform PopupMenu (on Honeycomb or above) or a backported version.
  */
 public class QuickSelectMenu {
 
-    private android.support.v7.widget.PopupMenu mImplPlatform;
+    private PopupMenu mImplPlatform;
 
     private OnItemSelectedListener mItemSelectedListener;
 
     public QuickSelectMenu(Context context, View anchor) {
-        mImplPlatform = new android.support.v7.widget.PopupMenu(context, anchor);
+        mImplPlatform = new PopupMenu(context, anchor);
         mImplPlatform
-                .setOnMenuItemClickListener(new android.support.v7.widget.PopupMenu.OnMenuItemClickListener() {
+                .setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                     @Override
                     public boolean onMenuItemClick(MenuItem item) {
                         return onMenuItemClickImpl(item);
diff --git a/ShoppingList/src/main/java/org/openintents/shopping/ui/widget/ShoppingItemsView.java b/ShoppingList/src/main/java/org/openintents/shopping/ui/widget/ShoppingItemsView.java
index 0fd3b50..4a983da 100644
--- a/ShoppingList/src/main/java/org/openintents/shopping/ui/widget/ShoppingItemsView.java
+++ b/ShoppingList/src/main/java/org/openintents/shopping/ui/widget/ShoppingItemsView.java
@@ -24,8 +24,6 @@
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Bundle;
-import android.support.design.widget.Snackbar;
-import android.support.v7.widget.SearchView;
 import android.text.Spannable;
 import android.text.SpannableStringBuilder;
 import android.text.TextPaint;
@@ -55,6 +53,10 @@
 import android.widget.SimpleCursorAdapter.ViewBinder;
 import android.widget.TextView;
 
+import androidx.appcompat.widget.SearchView;
+
+import com.google.android.material.snackbar.Snackbar;
+
 import org.openintents.distribution.DownloadAppDialog;
 import org.openintents.shopping.R;
 import org.openintents.shopping.ShoppingApplication;
diff --git a/ShoppingList/src/main/res/layout/activity_shopping.xml b/ShoppingList/src/main/res/layout/activity_shopping.xml
index e90b987..2ec0d7a 100644
--- a/ShoppingList/src/main/res/layout/activity_shopping.xml
+++ b/ShoppingList/src/main/res/layout/activity_shopping.xml
@@ -14,7 +14,7 @@
  * limitations under the License.
  -->
 
-<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/drawer_layout"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
@@ -154,4 +154,4 @@
         android:choiceMode="singleChoice"
         android:divider="@android:color/transparent"
         android:dividerHeight="0dp" />
-</android.support.v4.widget.DrawerLayout>
+</androidx.drawerlayout.widget.DrawerLayout>
diff --git a/build.gradle b/build.gradle
index eef39f8..66b0605 100644
--- a/build.gradle
+++ b/build.gradle
@@ -23,7 +23,6 @@ allprojects {
 ext {
     compileSdkVersion = 28
     targetSdkVersion = 28
-    supportVersion = "28.+"
     playServicesVersion = "16.0.1"
     supportWearableVersion = "2.4.0"
 }
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 0000000..5d18585
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1,13 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+#
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app"s APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Automatically convert third-party libraries to use AndroidX
+android.enableJetifier=true
\ No newline at end of file