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Implement DataStore
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‎app/README.md‎

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### This general module contains and covers the following topics:
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1. [Biometric Dialog](https://github.com/AsemLab/Samples/blob/main/app/src/main/java/com/asemlab/samples/ui/BiometricActivity.kt): show biometric dialog using the Biometric library. [Official](https://developer.android.com/identity/sign-in/biometric-auth)
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2. [DownloadManager](https://github.com/AsemLab/Samples/blob/main/app/src/main/java/com/asemlab/samples/download/FileDownloaderImp.kt): is a system service that handles long-running HTTP downloads. Clients may request that a URI be downloaded to a particular destination file. [Official](https://developer.android.com/reference/android/app/DownloadManager)
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2. [DataStore](https://github.com/AsemLab/Samples/blob/main/app/src/main/java/com/asemlab/samples/ui/DataStoreActivity.kt): is a data storage solution that allows you to store key-value pairs or typed objects with protocol buffers. [Official](https://developer.android.com/topic/libraries/architecture/datastore)
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3. [DownloadManager](https://github.com/AsemLab/Samples/blob/main/app/src/main/java/com/asemlab/samples/download/FileDownloaderImp.kt): is a system service that handles long-running HTTP downloads. Clients may request that a URI be downloaded to a particular destination file. [Official](https://developer.android.com/reference/android/app/DownloadManager)
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3. [Epoxy](https://github.com/AsemLab/Samples/blob/main/app/src/main/java/com/asemlab/samples/epoxy/EpoxyActivity.kt): is an Android library for building complex screens in a RecyclerView. [Official](https://github.com/airbnb/epoxy)
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4. [Pass data between components](https://github.com/AsemLab/Samples/tree/main/app/src/main/java/com/asemlab/samples/passdata): demonstrate how to pass data from Activity to Activity/Fragment and from Fragment to Activity/Fragment.
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5. [Per-app language preferences](https://github.com/AsemLab/Samples/blob/main/app/src/main/java/com/asemlab/samples/utils/LanguageHelper.kt): allow users to set their preferred language for each app. The app specific preferred language will override the system language for that particular application. [Official](https://developer.android.com/guide/topics/resources/app-languages)

‎app/build.gradle.kts‎

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implementation(libs.epoxy.databinding)
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kapt(libs.epoxy.processor)
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implementation(libs.androidx.biometric)
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// TODO Add DataStore dependency
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implementation(libs.datastore)
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}

‎app/src/main/AndroidManifest.xml‎

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<uses-permission android:name="android.permission.READ_CONTACTS" />
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<uses-permission android:name="android.permission.INTERNET" />
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<!-- TODO Add locales_config.xml -->
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<application
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android:allowBackup="true"
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android:icon="@mipmap/ic_launcher"
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android:roundIcon="@mipmap/ic_launcher_round"
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android:supportsRtl="true"
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android:theme="@style/Theme.ContactsContent">
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<activity
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android:name=".ui.DataStoreActivity"
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android:exported="true" >
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<!-- <intent-filter> -->
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<!-- <action android:name="android.intent.action.MAIN" /> -->
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<!-- <category android:name="android.intent.category.LAUNCHER" /> -->
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<!-- </intent-filter> -->
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</activity>
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<activity
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android:name=".ui.BiometricActivity"
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android:exported="true" />
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<activity
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android:name=".passdata.f2f.ThirdActivity"
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android:exported="true">
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<!-- <intent-filter> -->
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<!-- <action android:name="android.intent.action.MAIN" /> -->
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<!-- <action android:name="android.intent.action.MAIN" /> -->
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<!-- <category android:name="android.intent.category.LAUNCHER" /> -->
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<!-- <category android:name="android.intent.category.LAUNCHER" /> -->
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<!-- </intent-filter> -->
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</activity>
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<activity
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android:exported="true">
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<!-- <intent-filter> -->
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<!-- <action android:name="android.intent.action.MAIN" /> -->
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<!-- <action android:name="android.intent.action.MAIN" /> -->
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<!-- <category android:name="android.intent.category.LAUNCHER" /> -->
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<!-- <category android:name="android.intent.category.LAUNCHER" /> -->
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<!-- </intent-filter> -->
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</activity>
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<activity
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<activity
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android:name=".ui.NotificationProgressActivity"
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android:exported="true">
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<!-- <intent-filter>-->
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<!-- <action android:name="android.intent.action.MAIN" />-->
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<!-- <category android:name="android.intent.category.LAUNCHER" />-->
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<!-- </intent-filter>-->
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<!-- <intent-filter> -->
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<!-- <action android:name="android.intent.action.MAIN" /> -->
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<!-- <category android:name="android.intent.category.LAUNCHER" /> -->
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<!-- </intent-filter> -->
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</activity>
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<receiver

‎app/src/main/java/com/asemlab/samples/ui/DataStoreActivity.kt‎

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package com.asemlab.samples.ui
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import android.os.Bundle
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import androidx.activity.enableEdgeToEdge
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import androidx.appcompat.app.AppCompatActivity
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import androidx.core.view.ViewCompat
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import androidx.core.view.WindowInsetsCompat
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import androidx.databinding.DataBindingUtil
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import androidx.lifecycle.lifecycleScope
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import com.asemlab.samples.R
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import com.asemlab.samples.databinding.ActivityDatastoreBinding
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import com.asemlab.samples.utils.DataStoreUtils
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import kotlinx.coroutines.launch
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class DataStoreActivity : AppCompatActivity() {
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private lateinit var binding: ActivityDatastoreBinding
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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enableEdgeToEdge()
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binding = DataBindingUtil.setContentView(this, R.layout.activity_datastore)
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ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
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val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
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v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
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insets
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}
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with(binding) {
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lifecycleScope.launch {
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usernameTV.text = DataStoreUtils.getUsername(this@DataStoreActivity)
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genderTV.text = DataStoreUtils.getGender(this@DataStoreActivity).toString()
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ageTV.text = DataStoreUtils.getAge(this@DataStoreActivity).toString()
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}
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addButton.setOnClickListener {
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lifecycleScope.launch {
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DataStoreUtils.setUsername(this@DataStoreActivity, "Asem97")
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DataStoreUtils.setAge(this@DataStoreActivity, 28)
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DataStoreUtils.setGender(this@DataStoreActivity, true)
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recreate()
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}
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}
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}
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}
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}

‎app/src/main/java/com/asemlab/samples/utils/DataStoreUtils.kt‎

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package com.asemlab.samples.utils
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import android.content.Context
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import androidx.datastore.core.DataStore
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import androidx.datastore.preferences.core.Preferences
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import androidx.datastore.preferences.core.booleanPreferencesKey
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import androidx.datastore.preferences.core.edit
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import androidx.datastore.preferences.core.intPreferencesKey
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import androidx.datastore.preferences.core.stringPreferencesKey
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import androidx.datastore.preferences.preferencesDataStore
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import kotlinx.coroutines.flow.first
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import kotlinx.coroutines.flow.map
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object DataStoreUtils {
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// TODO Init DataStore object
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private val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = "user_details")
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// TODO Init keys
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val USERNAME_KEY = stringPreferencesKey("username")
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val AGE_KEY = intPreferencesKey("age")
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val GENDER_KEY = booleanPreferencesKey("gender")
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// TODO Write to DataStore
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suspend fun setUsername(context: Context, username: String) {
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context.dataStore.edit { data ->
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data[USERNAME_KEY] = username
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}
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}
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suspend fun setAge(context: Context, age: Int) {
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context.dataStore.edit { data ->
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data[AGE_KEY] = age
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}
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}
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suspend fun setGender(context: Context, gender: Boolean) {
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context.dataStore.edit { data ->
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data[GENDER_KEY] = gender
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}
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}
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// TODO Read from DataStore
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suspend fun getUsername(context: Context): String {
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return context.dataStore.data.map {
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it[USERNAME_KEY] ?: ""
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}.first()
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}
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suspend fun getAge(context: Context): Int {
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return context.dataStore.data.map {
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it[AGE_KEY] ?: 0
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}.first()
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}
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suspend fun getGender(context: Context): Boolean {
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return context.dataStore.data.map {
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it[GENDER_KEY] ?: false
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}.first()
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}
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}

‎app/src/main/res/layout/activity_datastore.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<layout>
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<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:id="@+id/main"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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tools:context=".ui.DataStoreActivity">
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<TextView
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android:id="@+id/usernameTV"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_marginVertical="16dp"
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android:textSize="18sp"
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app:layout_constraintBottom_toTopOf="@+id/ageTV"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintHorizontal_bias="0.5"
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app:layout_constraintStart_toStartOf="parent"
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app:layout_constraintTop_toTopOf="parent"
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app:layout_constraintVertical_chainStyle="packed"
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tools:text="asem97" />
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<TextView
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android:id="@+id/ageTV"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_marginVertical="16dp"
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android:textSize="18sp"
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app:layout_constraintBottom_toTopOf="@+id/genderTV"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintHorizontal_bias="0.5"
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app:layout_constraintStart_toStartOf="parent"
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app:layout_constraintTop_toBottomOf="@+id/usernameTV"
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tools:text="28" />
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<TextView
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android:id="@+id/genderTV"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_marginVertical="16dp"
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android:textSize="18sp"
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app:layout_constraintBottom_toTopOf="@id/addButton"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintHorizontal_bias="0.5"
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app:layout_constraintStart_toStartOf="parent"
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app:layout_constraintTop_toBottomOf="@+id/ageTV"
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tools:text="Male" />
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<Button
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android:id="@+id/addButton"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_marginVertical="16dp"
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android:text="Add default data"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintStart_toStartOf="parent"
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app:layout_constraintTop_toBottomOf="@+id/genderTV" />
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</androidx.constraintlayout.widget.ConstraintLayout>
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</layout>

‎gradle/libs.versions.toml‎

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apollo = "4.0.0"
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firebase-distribution = "16.0.0-beta13"
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play-services-location = "21.3.0"
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datastore = "1.1.7"
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[libraries]
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androidx-appcompat = { module = "androidx.appcompat:appcompat", version.ref = "appcompat" }
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firebase-appdistribution = { module = "com.google.firebase:firebase-appdistribution", version.ref="firebase-distribution" }
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firebase-appdistribution-api-ktx = { module = "com.google.firebase:firebase-appdistribution-api-ktx" , version.ref="firebase-distribution"}
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play-services-location = { module = "com.google.android.gms:play-services-location", version.ref = "play-services-location" }
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datastore = { module = "androidx.datastore:datastore-preferences", version.ref = "datastore" }
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[plugins]
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android-application = { id = "com.android.application", version.ref = "android-application" }

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