Develop Bulletin sdk

app/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'org.jetbrains.kotlin.android'
+    id 'kotlin-kapt'
+}
+
+android {
+    compileSdk 33
+
+    defaultConfig {
+        applicationId "com.bulletin"
+        minSdk 21
+        targetSdk 33
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_11
+        targetCompatibility JavaVersion.VERSION_11
+    }
+    kotlinOptions {
+        jvmTarget = 11
+    }
+    buildFeatures {
+        viewBinding true
+    }
+}
+
+
+ext {
+    appCompat='1.4.1'
+    materialDesign='1.6.0'
+    vectorDrawable='1.1.0'
+    multiDex='2.0.1'
+    jUnit='4.13.2'
+    runner='1.4.0'
+    playCore='1.10.3'
+    retrofit='2.9.0'
+    espressoCore='3.4.0'
+}
+dependencies {
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    implementation "androidx.appcompat:appcompat:$appCompat"
+    implementation "com.google.android.material:material:$materialDesign"
+    implementation "androidx.vectordrawable:vectordrawable:$vectorDrawable"
+    implementation "androidx.multidex:multidex:$multiDex"
+    implementation fileTree(dir: 'libs', include: ['*.aar', '*.jar'], exclude: [])
+    implementation 'androidx.databinding:viewbinding:7.4.0'
+    testImplementation "junit:junit:$jUnit"
+    androidTestImplementation "androidx.test:runner:$runner"
+    implementation "com.google.android.play:core:$playCore"
+    androidTestImplementation "androidx.test.espresso:espresso-core:$espressoCore"
+
+    implementation "com.squareup.retrofit2:converter-gson:$retrofit"
+
+    implementation 'com.github.bumptech.glide:glide:4.13.2'
+    kapt 'com.github.bumptech.glide:compiler:4.13.2'
+
+}

app/proguard-rules.pro

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+# 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

app/src/androidTest/java/com/example/bulletin/ExampleInstrumentedTest.kt

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+package com.example.bulletin
+
+import androidx.test.platform.app.InstrumentationRegistry
+//import androidx.test.ext.junit.runners.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.getInstrumentation().targetContext
+        assertEquals("com.example.bulletin", appContext.packageName)
+    }
+}

app/src/main/AndroidManifest.xml

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+<?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.bulletin">
+
+    <uses-permission android:name="android.permission.INTERNET"/>
+
+    <application
+        android:name="com.bulletin.BulletinApp"
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        tools:targetApi="31">
+        <activity
+            android:name=".DefaultActivity"
+            android:exported="true"
+            >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/bulletin/BulletinApp.kt

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+package com.bulletin
+
+import android.app.Application
+import android.content.Context
+import android.content.pm.PackageManager
+import android.util.Log
+import com.bulletin.utilities.GsonHelper
+import com.google.gson.Gson
+
+class BulletinApp : Application() {
+    private var gsonInstance: Gson? = null
+
+    companion object {
+        lateinit var shared: BulletinApp
+            private set
+
+        val applicationContext: Context
+            get() {
+                return shared.applicationContext
+            }
+    }
+
+    //Initializer
+    init {
+        shared = this
+        gsonInstance = GsonHelper.gsonInstance
+    }
+
+}

app/src/main/java/com/bulletin/BulletinDataStore.kt

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+package com.bulletin
+
+import com.bulletin.extension.lastSeenVersion
+import com.bulletin.models.BulletinInfo
+import com.bulletin.models.BulletinItem
+import com.bulletin.models.Version
+import com.bulletin.utilities.AppStorageHelper
+import com.bulletin.utilities.VersionUtil
+import java.util.*
+
+
+class BulletinDataStore {
+
+    var data: MutableList<BulletinInfo> = mutableListOf()
+        private set
+
+    fun registerVersionInfo11(version: Version, items: MutableList<HashMap<String, Any>>) {
+
+        val bulletinItems = ArrayList<BulletinItem>()
+        for (itemAttributes in items) {
+            val bulletinItem = BulletinItem.createBulletinItem(itemAttributes) ?: return continue
+            bulletinItems.add(bulletinItem)
+        }
+
+        registerVersionInfo(version, bulletinItems)
+    }
+
+    fun registerVersionInfo(version: Version, items: MutableList<BulletinItem>?) {
+
+        if (items == null || items.isEmpty()) {
+            return
+        }
+
+        // Create Bulletin Info Object
+        val bulletinInfo = BulletinInfo.init(version, items)
+
+        data.add(bulletinInfo)
+        Collections.sort(data, BulletinInfo.descendingSort)
+    }
+
+
+    fun getData(
+        fromNewVersion: Version?,
+        toOldVersion: Version?,
+        limit: Int? = null
+    ): ArrayList<BulletinInfo> {
+        //  val finalMap: MutableList<BulletinInfo> = mutableListOf()
+        val bulletinInfo = arrayListOf<BulletinInfo>()
+
+        if (fromNewVersion == null && toOldVersion == null && limit == null) {
+
+            bulletinInfo.addAll(data)
+            return bulletinInfo
+        } else if (fromNewVersion == null && toOldVersion == null && limit != null) {
+            bulletinInfo.addAll(data.take(limit))
+            return bulletinInfo
+        }
+
+        val sortedList = data.sortedWith(compareBy({
+            it.version.version
+        }))
+
+        for (indice in sortedList.indices) {
+
+            if (indice == 0) AppStorageHelper.shared.lastSeenVersion =
+                Version.init(sortedList[indice].version.version)
+            if (VersionUtil.versionCompare(
+                    fromNewVersion?.version,
+                    sortedList[indice].version.version
+                ) >= 0
+            ) {
+                bulletinInfo.add(sortedList[indice])
+            } else if (VersionUtil.versionCompare(
+                    toOldVersion?.version,
+                    sortedList[indice].version.version
+                ) < 0
+            ) {
+                bulletinInfo.add(sortedList[indice])
+            }
+
+            if (limit != null && bulletinInfo.size >= limit) break
+
+        }
+        return bulletinInfo
+    }
+}