Initial commit

android/.gitignore

@@ -0,0 +1,13 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild

android/LICENSE.txt

@@ -0,0 +1,201 @@
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android/README.md

@@ -0,0 +1,16 @@
+
+# Spam Classification Android Demo
+
+An Android Project to demonstrate the use of a TensorFlow Lite model to classify spam messages.
+
+## Major Updates as of February 2021
+
+* Improved `Classifier.kt` by removing unwanted methods.
+* Added documentation for classes and methods in `Classifier.kt` and `MainActivity.kt`.
+* Replaced `AsyncTask` with [Kotlin Coroutines](https://developer.android.com/kotlin/coroutines).
+
+## Feedback
+
+You can [open an issue](https://github.com/shubham0204/Spam_Classification_Android_Demo/issues/new) here or 
+[start a new Discussion](https://github.com/shubham0204/Spam_Classification_Android_Demo/discussions/new). 
+You may consider filling out this [form](https://forms.gle/6dbLZdmnBZjE99Bx5).

android/app/.gitignore

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

android/app/build.gradle

@@ -0,0 +1,40 @@
+apply plugin: 'com.android.application'
+
+apply plugin: 'kotlin-android'
+
+apply plugin: 'kotlin-android-extensions'
+
+android {
+    compileSdkVersion 28
+    defaultConfig {
+        applicationId "com.ml.quaterion.spamo"
+        minSdkVersion 23
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    aaptOptions {
+        noCompress "tflite"
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'androidx.appcompat:appcompat:1.0.2'
+    implementation 'androidx.core:core-ktx:1.0.1'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.3'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.3'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'org.tensorflow:tensorflow-lite:1.13.1'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test:runner:1.1.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
+}

android/app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

android/app/src/androidTest/java/com/ml/quaterion/spamo/ExampleInstrumentedTest.kt

@@ -0,0 +1,24 @@
+package com.ml.quaterion.spamo
+
+import androidx.test.InstrumentationRegistry
+import androidx.test.runner.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getTargetContext()
+        assertEquals("com.ml.quaterion.spamo", appContext.packageName)
+    }
+}

android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.ml.quaterion.spamo">
+
+    <application
+            android:allowBackup="true"
+            android:icon="@mipmap/ic_launcher"
+            android:label="@string/app_name"
+            android:roundIcon="@mipmap/ic_launcher_round"
+            android:supportsRtl="true"
+            android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

android/app/src/main/java/com/ml/quaterion/spamo/Classifier.kt

@@ -0,0 +1,106 @@
+package com.ml.quaterion.spamo
+
+import android.content.Context
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import org.json.JSONObject
+import java.io.IOException
+import java.util.*
+import kotlin.collections.HashMap
+
+class Classifier(context: Context, jsonFilename: String , inputMaxLen : Int ) {
+
+    private var context : Context? = context
+
+    // Filename for the exported vocab ( .json )
+    private var filename : String? = jsonFilename
+
+    // Max length of the input sequence for the given model.
+    private var maxlen : Int = inputMaxLen
+
+    private var vocabData : HashMap< String , Int >? = null
+
+    // Load the contents of the vocab ( see assets/word_dict.json )
+    private fun loadJSONFromAsset(filename : String? ): String? {
+        var json: String?
+        try {
+            val inputStream = context!!.assets.open(filename )
+            val size = inputStream.available()
+            val buffer = ByteArray(size)
+            inputStream.read(buffer)
+            inputStream.close()
+            json = String(buffer)
+        }
+        catch (ex: IOException) {
+            ex.printStackTrace()
+            return null
+        }
+        return json
+    }
+
+    fun processVocab( callback: VocabCallback ) {
+        CoroutineScope( Dispatchers.Main ).launch {
+            loadVocab( callback , loadJSONFromAsset( filename )!! )
+        }
+    }
+
+    // Tokenize the given sentence
+    fun tokenize ( message : String ): IntArray {
+        val parts : List<String> = message.split(" " )
+        val tokenizedMessage = ArrayList<Int>()
+        for ( part in parts ) {
+            if (part.trim() != ""){
+                var index : Int? = 0
+                index = if ( vocabData!![part] == null ) {
+                    0
+                } else{
+                    vocabData!![part]
+                }
+                tokenizedMessage.add( index!! )
+            }
+        }
+        return tokenizedMessage.toIntArray()
+    }
+
+    // Pad the given sequence to maxlen with zeros.
+    fun padSequence ( sequence : IntArray ) : IntArray {
+        val maxlen = this.maxlen
+        if ( sequence.size > maxlen ) {
+            return sequence.sliceArray( 0..maxlen )
+        }
+        else if ( sequence.size < maxlen ) {
+            val array = ArrayList<Int>()
+            array.addAll( sequence.asList() )
+            for ( i in array.size until maxlen ){
+                array.add(0)
+            }
+            return array.toIntArray()
+        }
+        else{
+            return sequence
+        }
+    }
+
+
+    interface VocabCallback {
+        fun onVocabProcessed()
+    }
+
+    private fun loadVocab(callback : VocabCallback, json : String )  {
+        with( Dispatchers.Default ) {
+            val jsonObject = JSONObject( json )
+            val iterator : Iterator<String> = jsonObject.keys()
+            val data = HashMap< String , Int >()
+            while ( iterator.hasNext() ) {
+                val key = iterator.next()
+                data[key] = jsonObject.get( key ) as Int
+            }
+            with( Dispatchers.Main ){
+                vocabData = data
+                callback.onVocabProcessed()
+            }
+        }
+    }
+
+}

android/app/src/main/java/com/ml/quaterion/spamo/MainActivity.kt

@@ -0,0 +1,88 @@
+package com.ml.quaterion.spamo
+
+import android.app.ProgressDialog
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.text.TextUtils
+import android.widget.Toast
+import kotlinx.android.synthetic.main.activity_main.*
+import org.tensorflow.lite.Interpreter
+import java.io.FileInputStream
+import java.io.IOException
+import java.nio.MappedByteBuffer
+import java.nio.channels.FileChannel
+import java.util.*
+
+class MainActivity : AppCompatActivity() {
+
+    // Name of TFLite model ( in /assets folder ).
+    private val MODEL_ASSETS_PATH = "model.tflite"
+
+    // Max Length of input sequence. The input shape for the model will be ( None , INPUT_MAXLEN ).
+    private val INPUT_MAXLEN = 171
+
+    private var tfLiteInterpreter : Interpreter? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+
+        // Init the classifier.
+        val classifier = Classifier( this , "word_dict.json" , INPUT_MAXLEN )
+        // Init TFLiteInterpreter
+        tfLiteInterpreter = Interpreter( loadModelFile() )
+
+        // Start vocab processing, show a ProgressDialog to the user.
+        val progressDialog = ProgressDialog( this )
+        progressDialog.setMessage( "Parsing word_dict.json ..." )
+        progressDialog.setCancelable( false )
+        progressDialog.show()
+        classifier.processVocab( object: Classifier.VocabCallback {
+            override fun onVocabProcessed() {
+                // Processing done, dismiss the progressDialog.
+                progressDialog.dismiss()
+            }
+        })
+
+        classifyButton.setOnClickListener {
+
+            val message = message_text.text.toString().toLowerCase().trim()
+            if ( !TextUtils.isEmpty( message ) ){
+                // Tokenize and pad the given input text.
+                val tokenizedMessage = classifier.tokenize( message )
+                val paddedMessage = classifier.padSequence( tokenizedMessage )
+
+                val results = classifySequence( paddedMessage )
+                val class1 = results[0]
+                val class2 = results[1]
+                result_text.text = "SPAM : $class2\nNOT SPAM : $class1 "
+            }
+            else{
+                Toast.makeText( this@MainActivity, "Please enter a message.", Toast.LENGTH_LONG).show();
+            }
+
+        }
+
+    }
+
+    @Throws(IOException::class)
+    private fun loadModelFile(): MappedByteBuffer {
+        val assetFileDescriptor = assets.openFd(MODEL_ASSETS_PATH)
+        val fileInputStream = FileInputStream(assetFileDescriptor.fileDescriptor)
+        val fileChannel = fileInputStream.channel
+        val startOffset = assetFileDescriptor.startOffset
+        val declaredLength = assetFileDescriptor.declaredLength
+        return fileChannel.map(FileChannel.MapMode.READ_ONLY, startOffset, declaredLength)
+    }
+
+    // Perform inference, given the input sequence.
+    private fun classifySequence (sequence : IntArray ): FloatArray {
+        // Input shape -> ( 1 , INPUT_MAXLEN )
+        val inputs : Array<FloatArray> = arrayOf( sequence.map { it.toFloat() }.toFloatArray() )
+        // Output shape -> ( 1 , 2 ) ( as numClasses = 2 )
+        val outputs : Array<FloatArray> = arrayOf( FloatArray( 2 ) )
+        tfLiteInterpreter?.run( inputs , outputs )
+        return outputs[0]
+    }
+
+}

android/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,34 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:aapt="http://schemas.android.com/aapt"
+        android:width="108dp"
+        android:height="108dp"
+        android:viewportHeight="108"
+        android:viewportWidth="108">
+    <path
+            android:fillType="evenOdd"
+            android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+            android:strokeColor="#00000000"
+            android:strokeWidth="1">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                    android:endX="78.5885"
+                    android:endY="90.9159"
+                    android:startX="48.7653"
+                    android:startY="61.0927"
+                    android:type="linear">
+                <item
+                        android:color="#44000000"
+                        android:offset="0.0"/>
+                <item
+                        android:color="#00000000"
+                        android:offset="1.0"/>
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+            android:fillColor="#FFFFFF"
+            android:fillType="nonZero"
+            android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+            android:strokeColor="#00000000"
+            android:strokeWidth="1"/>
+</vector>

android/app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:height="108dp"
+        android:width="108dp"
+        android:viewportHeight="108"
+        android:viewportWidth="108">
+    <path android:fillColor="#008577"
+          android:pathData="M0,0h108v108h-108z"/>
+    <path android:fillColor="#00000000" android:pathData="M9,0L9,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,0L19,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M29,0L29,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M39,0L39,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M49,0L49,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M59,0L59,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M69,0L69,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M79,0L79,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M89,0L89,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M99,0L99,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,9L108,9"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,19L108,19"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,29L108,29"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,39L108,39"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,49L108,49"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,59L108,59"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,69L108,69"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,79L108,79"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,89L108,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,99L108,99"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,29L89,29"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,39L89,39"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,49L89,49"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,59L89,59"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,69L89,69"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,79L89,79"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M29,19L29,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M39,19L39,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M49,19L49,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M59,19L59,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M69,19L69,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M79,19L79,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+</vector>

android/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <EditText
+        android:id="@+id/message_text"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_marginTop="32dp"
+        android:layout_marginEnd="16dp"
+        android:ems="10"
+        android:hint="Your message goes here ..."
+        android:inputType="textMultiLine|textPersonName"
+        android:textSize="24sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/classifyButton"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="24dp"
+        android:layout_marginEnd="24dp"
+        android:layout_marginBottom="24dp"
+        android:text="classify"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.498"
+        app:layout_constraintStart_toStartOf="parent" />
+
+    <TextView
+        android:id="@+id/result_text"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_marginTop="24dp"
+        android:layout_marginEnd="16dp"
+        android:textSize="18sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/message_text" />
+</androidx.constraintlayout.widget.ConstraintLayout>

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

android/app/src/main/res/values/colors.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#008577</color>
+    <color name="colorPrimaryDark">#00574B</color>
+    <color name="colorAccent">#D81B60</color>
+</resources>

android/app/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Spamo</string>
+</resources>

android/app/src/main/res/values/styles.xml

@@ -0,0 +1,11 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+</resources>

android/app/src/test/java/com/ml/quaterion/spamo/ExampleUnitTest.kt

@@ -0,0 +1,17 @@
+package com.ml.quaterion.spamo
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}

android/build.gradle

@@ -0,0 +1,28 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+    ext.kotlin_version = '1.3.21'
+    repositories {
+        google()
+        jcenter()
+        
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:4.1.1'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+        
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

android/gradle.properties

@@ -0,0 +1,21 @@
+# 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
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx1536m
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+# 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
+# Kotlin code style for this project: "official" or "obsolete":
+kotlin.code.style=official

android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Sat Feb 20 01:09:33 IST 2021
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip

android/gradlew

@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

android/gradlew.bat

@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

android/settings.gradle

@@ -0,0 +1 @@
+include ':app'

python/DataProcessor.py

@@ -0,0 +1,48 @@
+
+import tensorflow as tf
+import numpy as np
+import pandas as pd
+import json
+from sklearn.model_selection import train_test_split
+
+dataframe = pd.read_csv( 'raw_data/data.csv' , encoding='iso8859' , usecols=[ 'v1' , 'v2' ] )
+
+labels = list()
+for line in dataframe.v1:
+	labels.append( 0 if line == 'ham' else 1 )
+texts = list()
+for line in dataframe.v2:
+	texts.append( line )
+lengths = list()
+for text in texts:
+	lengths.append( len( text.split() ) )
+maxlen = max( lengths )
+labels = np.array( labels )
+texts = np.array( texts )
+
+tokenizer = tf.keras.preprocessing.text.Tokenizer()
+tokenizer.fit_on_texts( texts )
+tokenized_messages = tokenizer.texts_to_sequences( texts )
+padded_messages = tf.keras.preprocessing.sequence.pad_sequences( tokenized_messages , maxlen )
+onehot_labels = tf.keras.utils.to_categorical( labels , num_classes=2 )
+
+X = padded_messages
+Y = onehot_labels
+
+print( X.shape )
+print( Y.shape )
+print( 'MESSAGE MAXLEN = {}'.format( maxlen ) )
+
+train_features , test_features ,train_labels, test_labels = train_test_split( X , Y , test_size=0.4 )
+output_path = 'processed_data/'
+np.save( '{}x.npy'.format( output_path )  , train_features )
+np.save( '{}y.npy'.format( output_path )  , train_labels )
+np.save( '{}test_x.npy'.format( output_path ) , test_features )
+np.save( '{}test_y.npy'.format( output_path ) , test_labels )
+
+with open( 'android/word_dict.json' , 'w' ) as file:
+	json.dump( tokenizer.word_index , file )
+
+print( 'Data processed.')
+
+

python/LICENSE.txt

@@ -0,0 +1,201 @@
+Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
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python/MainFile.py

@@ -0,0 +1,29 @@
+
+from Model import Classifier
+import numpy as np
+
+X = np.load( 'processed_data/x.npy')
+Y = np.load( 'processed_data/y.npy')
+test_X = np.load( 'processed_data/test_x.npy')
+test_Y = np.load( 'processed_data/test_y.npy')
+
+print( X.shape )
+print( Y.shape )
+print( test_X.shape )
+print( test_Y.shape )
+
+classifier = Classifier( number_of_classes=2 , maxlen=171 )
+#classifier.load_model( 'models/model.h5' )
+
+parameters = {
+    'batch_size' : 100 ,
+    'epochs' : 1 ,
+    'callbacks' : None ,
+    'val_data' : ( test_X , test_Y )
+}
+classifier.fit( X , Y , parameters )
+classifier.save_model( 'models/model.h5')
+
+loss , accuracy = classifier.evaluate( test_X , test_Y )
+print( "Loss of {}".format( loss ) , "Accuracy of {} %".format( accuracy * 100 ) )
+

python/Model.py

@@ -0,0 +1,63 @@
+
+from tensorflow.keras import models , optimizers , losses ,activations
+from tensorflow.keras.layers import *
+import tensorflow as tf
+import time
+
+class Classifier (object) :
+
+	def __init__( self , number_of_classes , maxlen ):
+		dropout_rate = 0.5
+		input_shape = ( maxlen ,  )
+		target_shape = ( maxlen , 1 )
+		self.model_scheme = [
+			Reshape( input_shape=input_shape , target_shape=( maxlen , 1 ) ),
+			Conv1D( 128, kernel_size=2 , strides=1, activation=activations.relu , kernel_regularizer='l1'),
+			MaxPooling1D(pool_size=2 ),
+			Flatten() ,
+			Dense( 64 , activation=activations.relu ) ,
+			BatchNormalization(),
+			Dropout(dropout_rate),
+			Dense( number_of_classes, activation=tf.nn.softmax )
+		]
+
+		self.__model = tf.keras.Sequential(self.model_scheme)
+		self.__model.compile(
+			optimizer=optimizers.Adam( lr=0.0001 ),
+			loss=losses.categorical_crossentropy ,
+			metrics=[ 'accuracy' ] ,
+		)
+
+
+	def fit(self, X, Y ,  hyperparameters  ):
+		initial_time = time.time()
+		self.__model.fit( X  , Y ,
+						 batch_size=hyperparameters[ 'batch_size' ] ,
+						 epochs=hyperparameters[ 'epochs' ] ,
+						 callbacks=hyperparameters[ 'callbacks'],
+						 validation_data=hyperparameters[ 'val_data' ]
+						 )
+		final_time = time.time()
+		eta = ( final_time - initial_time )
+		time_unit = 'seconds'
+		if eta >= 60 :
+			eta = eta / 60
+			time_unit = 'minutes'
+		self.__model.summary( )
+		print( 'Elapsed time acquired for {} epoch(s) -> {} {}'.format( hyperparameters[ 'epochs' ] , eta , time_unit ) )
+
+
+	def evaluate(self , test_X , test_Y  ) :
+		return self.__model.evaluate(test_X, test_Y)
+
+
+	def predict(self, X  ):
+		predictions = self.__model.predict( X  )
+		return predictions
+
+
+	def save_model(self , file_path ):
+		self.__model.save(file_path )
+
+	def load_model(self , file_path ):
+		self.__model = models.load_model(file_path)

python/README.md

@@ -0,0 +1,3 @@
+# Spam_Classification_TF
+
+This project is quite old, and needs a refresh!

python/TFLiteBufferConverter.py

@@ -0,0 +1,13 @@
+
+import tensorflow as tf
+
+tf.logging.set_verbosity( tf.logging.ERROR )
+
+keras_model_path = input( "Enter Keras model file path > " )
+
+converter = tf.lite.TFLiteConverter.from_keras_model_file( keras_model_path )
+converter.post_training_quantize = True
+tflite_buffer = converter.convert()
+open( 'android/model.tflite' , 'wb' ).write( tflite_buffer )
+
+print( 'TFLite model created.')