Solution in Android 12

.gitignore

@@ -1,44 +1,7 @@
-# Compiled source #
-###################
-*.com
-*.class
-*.dll
-*.exe
-*.o
-*.o.d
-*.so
-
-# Packages #
-############
-# it's better to unpack these files and commit the raw source
-# git has its own built in compression methods
-*.7z
-*.dmg
-*.gz
-*.iso
-*.rar
-*.tar
-*.zip
-
-# Generated code #
-##################
-obj/*
-libs/*
-bin/*
-gen/*
-
-# Logs               #
-######################
-*.log
-
-# OS generated files #
-######################
-.DS_Store*
-ehthumbs.db
-Icon?
-Thumbs.db
-
-# Eclipse Artifacts #
-#####################
-.metadata/*
-
+.gradle
+/local.properties
+/.idea/
+*.iml
+.DS_Store
+/build
+/captures

README.asciidoc

@@ -1,13 +1,5 @@
-= About This Project
+= Storage Encryption
 
-This Android Eclipse project demonstrates how [not] to protect data in an Android application.
+This project was created to support https://www.protechtraining.com/android-security-pt15256[Protech Android Security Training] course
 
-This code was developed to support Marakana's Android Training courses.
-
-For more info, see http://marakana.com/training/android/
-
-== Legal
-
-Please see ++NOTICE++ file in this directory for copyright, license terms, and legal disclaimers.
-
-Copyright © 2012 Marakana Inc.
+This application is intended to demonstrate the use of Android cryptography to encrypt data in Android.

app/.gitignore

@@ -0,0 +1 @@
+/build

app/build.gradle

@@ -0,0 +1,36 @@
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion 31
+
+    defaultConfig {
+        applicationId "com.example.android.securenote"
+        minSdkVersion 23
+        targetSdkVersion 31
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
+        }
+    }
+
+    buildFeatures {
+        viewBinding true
+    }
+
+    packagingOptions {
+        exclude 'META-INF/atomicfu.kotlin_module'
+    }
+}
+repositories {
+    mavenCentral()
+}
+dependencies {
+    implementation 'androidx.appcompat:appcompat:1.3.0'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.1-native-mt'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.1-native-mt'
+    implementation 'androidx.security:security-crypto:1.1.0-alpha03'
+}

app/src/main/AndroidManifest.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="com.example.android.securenote">
+
+    <application
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:theme="@style/Theme.AppCompat"
+        android:allowBackup="true"
+        tools:ignore="GoogleAppIndexingWarning">
+        <activity
+            android:name=".SecureNoteActivity"
+            android:label="@string/app_name"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>