diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 7ac24c77..5cd135a0 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
+        <option name="testRunner" value="PLATFORM" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="modules">
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 99202cc2..23cea1a2 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -5,27 +5,41 @@
     <option name="myDefaultNotNull" value="android.support.annotation.NonNull" />
     <option name="myNullables">
       <value>
-        <list size="5">
+        <list size="12">
           <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
           <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
           <item index="2" class="java.lang.String" itemvalue="javax.annotation.CheckForNull" />
           <item index="3" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
           <item index="4" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
+          <item index="5" class="java.lang.String" itemvalue="androidx.annotation.Nullable" />
+          <item index="6" class="java.lang.String" itemvalue="android.annotation.Nullable" />
+          <item index="7" class="java.lang.String" itemvalue="androidx.annotation.RecentlyNullable" />
+          <item index="8" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.Nullable" />
+          <item index="9" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableDecl" />
+          <item index="10" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableType" />
+          <item index="11" class="java.lang.String" itemvalue="com.android.annotations.Nullable" />
         </list>
       </value>
     </option>
     <option name="myNotNulls">
       <value>
-        <list size="4">
+        <list size="11">
           <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
           <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nonnull" />
           <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
           <item index="3" class="java.lang.String" itemvalue="android.support.annotation.NonNull" />
+          <item index="4" class="java.lang.String" itemvalue="androidx.annotation.NonNull" />
+          <item index="5" class="java.lang.String" itemvalue="android.annotation.NonNull" />
+          <item index="6" class="java.lang.String" itemvalue="androidx.annotation.RecentlyNonNull" />
+          <item index="7" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.NonNull" />
+          <item index="8" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NonNullDecl" />
+          <item index="9" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NonNullType" />
+          <item index="10" class="java.lang.String" itemvalue="com.android.annotations.NonNull" />
         </list>
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/.idea/modules.xml b/.idea/modules.xml
index 850f4e70..f246cefb 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -3,7 +3,8 @@
   <component name="ProjectModuleManager">
     <modules>
       <module fileurl="file://$PROJECT_DIR$/Minimal-Todo.iml" filepath="$PROJECT_DIR$/Minimal-Todo.iml" />
-      <module fileurl="file://$PROJECT_DIR$/app/app.iml" filepath="$PROJECT_DIR$/app/app.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/Wen Nise-Minimal-Todo.iml" filepath="$PROJECT_DIR$/.idea/modules/Wen Nise-Minimal-Todo.iml" group="Minimal-Todo" />
+      <module fileurl="file://$PROJECT_DIR$/app/app.iml" filepath="$PROJECT_DIR$/app/app.iml" group="Minimal-Todo/app" />
     </modules>
   </component>
 </project>
\ No newline at end of file
diff --git a/app/app.iml b/app/app.iml
index 2a197e74..1eea895e 100644
--- a/app/app.iml
+++ b/app/app.iml
@@ -1,9 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<module external.linked.project.id=":app" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$/.." external.system.id="GRADLE" type="JAVA_MODULE" version="4">
+<module external.linked.project.id=":app" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$/.." external.system.id="GRADLE" external.system.module.group="Minimal-Todo" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
   <component name="FacetManager">
     <facet type="android-gradle" name="Android-Gradle">
       <configuration>
         <option name="GRADLE_PROJECT_PATH" value=":app" />
+        <option name="LAST_SUCCESSFUL_SYNC_AGP_VERSION" value="3.2.1" />
+        <option name="LAST_KNOWN_AGP_VERSION" value="4.0.0" />
       </configuration>
     </facet>
     <facet type="android" name="Android">
@@ -17,32 +19,29 @@
         <option name="ALLOW_USER_CONFIGURATION" value="false" />
         <option name="MANIFEST_FILE_RELATIVE_PATH" value="/src/main/AndroidManifest.xml" />
         <option name="RES_FOLDER_RELATIVE_PATH" value="/src/main/res" />
-        <option name="RES_FOLDERS_RELATIVE_PATH" value="file://$MODULE_DIR$/src/main/res" />
+        <option name="RES_FOLDERS_RELATIVE_PATH" value="file://$MODULE_DIR$/src/main/res;file://$MODULE_DIR$/src/debug/res;file://$MODULE_DIR$/build/generated/res/google-services/debug;file://$MODULE_DIR$/build/generated/res/rs/debug" />
+        <option name="TEST_RES_FOLDERS_RELATIVE_PATH" value="file://$MODULE_DIR$/src/androidTest/res;file://$MODULE_DIR$/src/test/res;file://$MODULE_DIR$/src/androidTestDebug/res;file://$MODULE_DIR$/src/testDebug/res;file://$MODULE_DIR$/build/generated/res/rs/androidTest/debug" />
         <option name="ASSETS_FOLDER_RELATIVE_PATH" value="/src/main/assets" />
       </configuration>
     </facet>
   </component>
   <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7">
-    <output url="file://$MODULE_DIR$/build/intermediates/javac/debug/compileDebugJavaWithJavac/classes" />
-    <output-test url="file://$MODULE_DIR$/build/intermediates/javac/debugUnitTest/compileDebugUnitTestJavaWithJavac/classes" />
+    <output url="file://$MODULE_DIR$/build/intermediates/javac/debug/classes" />
+    <output-test url="file://$MODULE_DIR$/build/intermediates/javac/debugUnitTest/classes" />
     <exclude-output />
     <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/apt/debug" isTestSource="false" generated="true" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/not_namespaced_r_class_sources/debug/processDebugResources/r" isTestSource="false" generated="true" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/aidl/debug" isTestSource="false" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/ap_generated_sources/debug/out" isTestSource="false" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/aidl_source_output_dir/debug/out" isTestSource="false" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/source/buildConfig/debug" isTestSource="false" generated="true" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/rs/debug" isTestSource="false" generated="true" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/res/google-services/debug" type="java-resource" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/res/rs/debug" type="java-resource" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/res/resValues/debug" type="java-resource" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/apt/androidTest/debug" isTestSource="true" generated="true" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/not_namespaced_r_class_sources/debugAndroidTest/processDebugAndroidTestResources/r" isTestSource="true" generated="true" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/aidl/androidTest/debug" isTestSource="true" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/renderscript_source_output_dir/debug/out" isTestSource="false" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/res/google-services/debug" type="java-resource" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/res/rs/debug" type="java-resource" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/ap_generated_sources/debugAndroidTest/out" isTestSource="true" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/aidl_source_output_dir/debugAndroidTest/out" isTestSource="true" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/build/generated/source/buildConfig/androidTest/debug" isTestSource="true" generated="true" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/rs/androidTest/debug" isTestSource="true" generated="true" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/res/rs/androidTest/debug" type="java-test-resource" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/res/resValues/androidTest/debug" type="java-test-resource" />
-      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/apt/test/debug" isTestSource="true" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/renderscript_source_output_dir/debugAndroidTest/out" isTestSource="true" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/res/rs/androidTest/debug" type="java-test-resource" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/ap_generated_sources/debugUnitTest/out" isTestSource="true" generated="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/debug/res" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/debug/resources" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/debug/assets" type="java-resource" />
@@ -50,13 +49,6 @@
       <sourceFolder url="file://$MODULE_DIR$/src/debug/java" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/debug/rs" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/debug/shaders" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/res" type="java-test-resource" />
-      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/resources" type="java-test-resource" />
-      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/assets" type="java-test-resource" />
-      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/aidl" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/java" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/rs" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/shaders" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/res" type="java-test-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/resources" type="java-test-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/assets" type="java-test-resource" />
@@ -64,6 +56,13 @@
       <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/java" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/rs" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/androidTestDebug/shaders" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/res" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/resources" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/assets" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/aidl" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/java" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/rs" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/testDebug/shaders" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/res" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/assets" type="java-resource" />
@@ -85,63 +84,22 @@
       <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/rs" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/shaders" isTestSource="true" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/annotation_processor_list" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/apk_list" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/assets" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/blame" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/build-info" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/builds" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/check-libraries" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/check-manifest" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/checkDebugClasspath" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/classes" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/compatible_screen_manifest" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental-classes" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental-runtime-classes" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental-verifier" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/instant-run-apk" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/instant-run-main-apk-res" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/instant-run-resources" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/instant_run_merged_manifests" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/javaPrecompile" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/javac" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/jniLibs" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/lint_jar" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/manifest-checker" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/manifests" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/merged_assets" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/merged_manifests" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/prebuild" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/processed_res" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/reload-dex" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/res" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/resources" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/rs" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/shader_assets" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/shaders" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/split-apk" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/split_list" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/splits-support" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/symbols" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/transforms" />
-      <excludeFolder url="file://$MODULE_DIR$/build/outputs" />
-      <excludeFolder url="file://$MODULE_DIR$/build/tmp" />
+      <excludeFolder url="file://$MODULE_DIR$/build" />
     </content>
     <orderEntry type="jdk" jdkName="Android API 23 Platform" jdkType="Android SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="library" name="Gradle: com.android.support:support-annotations:23.1.0@jar" level="project" />
     <orderEntry type="library" name="Gradle: com.nineoldandroids:library:2.4.0@jar" level="project" />
-    <orderEntry type="library" name="Gradle: com.wdullaer:materialdatetimepicker-1.5.1" level="project" />
-    <orderEntry type="library" name="Gradle: com.github.ganfra:material-spinner-1.1.0" level="project" />
-    <orderEntry type="library" name="Gradle: com.android.support:recyclerview-v7-23.1.0" level="project" />
-    <orderEntry type="library" name="Gradle: com.android.support:appcompat-v7-23.1.0" level="project" />
-    <orderEntry type="library" name="Gradle: com.google.android.gms:play-services-analytics-7.8.0" level="project" />
-    <orderEntry type="library" name="Gradle: com.amulyakhare:com.amulyakhare.textdrawable-1.0.1" level="project" />
-    <orderEntry type="library" name="Gradle: com.android.support:support-v4-23.1.0" level="project" />
-    <orderEntry type="library" name="Gradle: com.android.support:design-23.1.0" level="project" />
-    <orderEntry type="library" name="Gradle: com.google.android.gms:play-services-base-7.8.0" level="project" />
-    <orderEntry type="library" name="Gradle: uk.co.chrisjenx:calligraphy-2.1.0" level="project" />
-    <orderEntry type="library" name="Gradle: com.android.support:support-v13-23.1.0" level="project" />
+    <orderEntry type="library" name="Gradle: com.google.android.gms:play-services-analytics:7.8.0@aar" level="project" />
+    <orderEntry type="library" name="Gradle: com.google.android.gms:play-services-base:7.8.0@aar" level="project" />
+    <orderEntry type="library" name="Gradle: com.wdullaer:materialdatetimepicker:1.5.1@aar" level="project" />
+    <orderEntry type="library" name="Gradle: com.android.support:design:23.1.0@aar" level="project" />
+    <orderEntry type="library" name="Gradle: com.android.support:recyclerview-v7:23.1.0@aar" level="project" />
+    <orderEntry type="library" name="Gradle: uk.co.chrisjenx:calligraphy:2.1.0@aar" level="project" />
+    <orderEntry type="library" name="Gradle: com.github.ganfra:material-spinner:1.1.0@aar" level="project" />
+    <orderEntry type="library" name="Gradle: com.android.support:appcompat-v7:23.1.0@aar" level="project" />
+    <orderEntry type="library" name="Gradle: com.android.support:support-v13:23.1.0@aar" level="project" />
+    <orderEntry type="library" name="Gradle: com.android.support:support-v4:23.1.0@aar" level="project" />
+    <orderEntry type="library" name="Gradle: com.amulyakhare:com.amulyakhare.textdrawable:1.0.1@aar" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index f1b98cf2..a8266638 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.1'
+        classpath 'com.android.tools.build:gradle:4.0.0'
         classpath 'com.google.gms:google-services:1.3.0-beta1'
 
         // NOTE: Do not place your application dependencies here; they belong
@@ -23,7 +23,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.jakewharton:butterknife-gradle-plugin:8.5.1'
+        classpath 'com.jakewharton:butterknife-gradle-plugin:9.0.0-rc2'
     }
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index d5d5c1c0..69e8b432 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,7 +1,6 @@
-#Tue Nov 06 17:37:41 IST 2018
-
+#Sun Aug 09 15:44:24 SGT 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip