Updated from Java to Kotlin and Bug fixes

Author: nimran

.gitignore

@@ -7,3 +7,5 @@
 /build
 /captures
 .externalNativeBuild
+/.idea/*
+.idea

.idea/caches/build_file_checksums.ser

@@ -1,15 +1,16 @@
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion "25.0.2"
+    compileSdkVersion 30
+    buildToolsVersion "30.0.2"
     defaultConfig {
         applicationId "study.amazons3integration"
-        minSdkVersion 15
-        targetSdkVersion 25
+        minSdkVersion 19
+        targetSdkVersion 30
         versionCode 1
         versionName "1.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
     }
     buildTypes {
         release {
@@ -20,14 +21,19 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    androidTestCompile('androidx.test.espresso:espresso-core:3.1.0', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    compile 'com.android.support:appcompat-v7:25.2.0'
-    testCompile 'junit:junit:4.12'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    testImplementation 'junit:junit:4.12'
 
-    compile 'com.amazonaws:aws-android-sdk-s3:2.2.+'
-    compile 'com.amazonaws:aws-android-sdk-cognito:2.2.+'
-    compile 'com.amazonaws:aws-android-sdk-cognitoidentityprovider:2.2.+'
+    implementation 'com.amazonaws:aws-android-sdk-s3:2.18.0'
+    implementation 'com.amazonaws:aws-android-sdk-cognito:2.18.0'
+    implementation 'com.amazonaws:aws-android-sdk-cognitoidentityprovider:2.18.0'
+    implementation "androidx.core:core-ktx:1.3.1"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}
+repositories {
+    mavenCentral()
 }

.idea/codeStyles/Project.xml

@@ -9,7 +9,6 @@
     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
 
     <application
-        android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:supportsRtl="true"