From 598d24a257b80ac74a15b4f406bfa90c585d0745 Mon Sep 17 00:00:00 2001
From: maifeeulasad <maifeeulasad@gmail.com>
Date: Thu, 11 Feb 2021 18:46:16 +0600
Subject: [PATCH 1/7] setup for stable android studio + stable android
 libraries//wip

---
 .idea/compiler.xml                                     |  2 +-
 .idea/gradle.xml                                       |  1 +
 .idea/misc.xml                                         |  2 +-
 .idea/runConfigurations.xml                            | 10 ----------
 .../spikeysanju/expensetracker/model/Transaction.kt    |  2 +-
 .../expensetracker/view/dashboard/DashboardFragment.kt |  2 +-
 build.gradle                                           |  4 ++--
 gradle/wrapper/gradle-wrapper.properties               |  2 +-
 8 files changed, 8 insertions(+), 17 deletions(-)
 delete mode 100644 .idea/runConfigurations.xml

diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index fb7f4a8..61a9130 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="11" />
+    <bytecodeTargetLevel target="1.8" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index ac6b0ae..23a89bb 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -15,6 +15,7 @@
           </set>
         </option>
         <option name="resolveModulePerSourceSet" value="false" />
+        <option name="useQualifiedModuleNames" value="true" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 4700283..d5d35ec 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="false" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/.idea/runConfigurations.xml b/.idea/runConfigurations.xml
deleted file mode 100644
index 797acea..0000000
--- a/.idea/runConfigurations.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RunConfigurationProducerService">
-    <option name="ignoredProducers">
-      <set>
-        <option value="com.android.tools.idea.compose.preview.runconfiguration.ComposePreviewRunConfigurationProducer" />
-      </set>
-    </option>
-  </component>
-</project>
\ No newline at end of file
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/model/Transaction.kt b/app/src/main/java/dev/spikeysanju/expensetracker/model/Transaction.kt
index 51e824b..abed210 100644
--- a/app/src/main/java/dev/spikeysanju/expensetracker/model/Transaction.kt
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/model/Transaction.kt
@@ -26,7 +26,7 @@ data class Transaction(
         System.currentTimeMillis(),
     @PrimaryKey(autoGenerate = true)
     @ColumnInfo(name = "id")
-    var id: Int = 0,
+    var id: Int = 0
 ) : Serializable {
     val createdAtDateFormat: String
         get() = DateFormat.getDateTimeInstance()
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/view/dashboard/DashboardFragment.kt b/app/src/main/java/dev/spikeysanju/expensetracker/view/dashboard/DashboardFragment.kt
index a2b43b8..61853a5 100644
--- a/app/src/main/java/dev/spikeysanju/expensetracker/view/dashboard/DashboardFragment.kt
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/view/dashboard/DashboardFragment.kt
@@ -93,7 +93,7 @@ class DashboardFragment :
             override fun onMove(
                 recyclerView: RecyclerView,
                 viewHolder: RecyclerView.ViewHolder,
-                target: RecyclerView.ViewHolder,
+                target: RecyclerView.ViewHolder
             ): Boolean {
                 return true
             }
diff --git a/build.gradle b/build.gradle
index b64ea26..bcee468 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,12 +1,12 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.kotlin_version = "1.4.21"
+    ext.kotlin_version = "1.3.72"
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.2.0-beta04'
+        classpath "com.android.tools.build:gradle:4.1.2"
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.3.3"
         classpath 'com.google.dagger:hilt-android-gradle-plugin:2.30.1-alpha'
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index ae8dbe4..104492c 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https://services.gradle.org/distributions/gradle-6.7.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip

From 0f4ddfab7244626677f3b39a6871b9df0e793f9c Mon Sep 17 00:00:00 2001
From: maifeeulasad <maifeeulasad@gmail.com>
Date: Thu, 18 Mar 2021 15:23:25 +0600
Subject: [PATCH 2/7] implemented basic bio-metric

---
 app/build.gradle                              |  3 ++
 app/src/main/AndroidManifest.xml              |  3 +-
 .../expensetracker/view/main/MainActivity.kt  | 45 +++++++++++++++++++
 3 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/app/build.gradle b/app/build.gradle
index ce37383..ae00e97 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -96,4 +96,7 @@ dependencies {
     //implementation "com.google.dagger:hilt-android-testing:$hilt_ver"
     implementation "androidx.hilt:hilt-common:1.0.0-alpha03"
     implementation "androidx.hilt:hilt-lifecycle-viewmodel:1.0.0-alpha03"
+
+    //Bio-metric
+    implementation 'androidx.biometric:biometric:1.2.0-alpha03'
 }
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 637e37e..d7ce326 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -3,7 +3,8 @@
     package="dev.spikeysanju.expensetracker">
 
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
-
+    <uses-permission android:name="android.permission.USE_BIOMETRIC"
+        android:requiredFeature="true"/>
 
     <application
         android:name=".app.ExpenseTracker"
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt b/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt
index 842ed40..a5f08f9 100644
--- a/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt
@@ -1,8 +1,11 @@
 package dev.spikeysanju.expensetracker.view.main
 
 import android.os.Bundle
+import android.widget.Toast
 import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
+import androidx.biometric.BiometricPrompt
+import androidx.core.content.ContextCompat
 import androidx.navigation.NavController
 import androidx.navigation.fragment.NavHostFragment
 import androidx.navigation.ui.AppBarConfiguration
@@ -14,12 +17,18 @@ import dev.spikeysanju.expensetracker.databinding.ActivityMainBinding
 import dev.spikeysanju.expensetracker.repo.TransactionRepo
 import dev.spikeysanju.expensetracker.utils.viewModelFactory
 import dev.spikeysanju.expensetracker.view.main.viewmodel.TransactionViewModel
+import java.util.concurrent.Executor
+import kotlin.system.exitProcess
 
 @AndroidEntryPoint
 class MainActivity : AppCompatActivity() {
     private lateinit var navHostFragment: NavHostFragment
     private lateinit var appBarConfiguration: AppBarConfiguration
 
+    private lateinit var executor: Executor
+    private lateinit var biometricPrompt: BiometricPrompt
+    private lateinit var promptInfo: BiometricPrompt.PromptInfo
+
     private val repo by lazy { TransactionRepo(AppDatabase(this)) }
     private val viewModel: TransactionViewModel by viewModels {
         viewModelFactory { TransactionViewModel(this.application, repo) }
@@ -36,6 +45,8 @@ class MainActivity : AppCompatActivity() {
          */
         viewModel
 
+        authenticate()
+
         initViews(binding)
         observeNavElements(binding, navHostFragment.navController)
     }
@@ -79,4 +90,38 @@ class MainActivity : AppCompatActivity() {
         navHostFragment.navController.navigateUp()
         return super.onSupportNavigateUp()
     }
+
+    private fun authenticate(){
+        executor = ContextCompat.getMainExecutor(this)
+        biometricPrompt = BiometricPrompt(this, executor,
+            object : BiometricPrompt.AuthenticationCallback() {
+                override fun onAuthenticationSucceeded(
+                    result: BiometricPrompt.AuthenticationResult) {
+                    super.onAuthenticationSucceeded(result)
+                    Toast.makeText(applicationContext,
+                        "Welcome to Expenso", Toast.LENGTH_LONG)
+                        .show()
+                }
+
+                override fun onAuthenticationFailed() {
+                    super.onAuthenticationFailed()
+                    //todo: show message wait for a second; static err code
+                    exitProcess(-1)
+                }
+
+                override fun onAuthenticationError(errorCode: Int,
+                                                   errString: CharSequence) {
+                    super.onAuthenticationError(errorCode, errString)
+                    //todo: show message wait for a second; static err code
+                    exitProcess(-2)
+                }
+            })
+
+        promptInfo = BiometricPrompt.PromptInfo.Builder()
+            .setTitle("Please complete bio-metric login to continue")
+            .setNegativeButtonText("Exit")
+            .build()
+        biometricPrompt.authenticate(promptInfo)
+    }
+
 }

From bed5ff03ec8b3ce357c6b5bdffeaa62173e8d67f Mon Sep 17 00:00:00 2001
From: maifeeulasad <maifeeulasad@gmail.com>
Date: Fri, 19 Mar 2021 13:09:26 +0600
Subject: [PATCH 3/7] added settings in menu + settings fragment + biometric
 preference saved

---
 .idea/codeStyles/Project.xml                  |  15 +-
 .../data/local/datastore/SettingsDataStore.kt |  42 ++++
 .../view/dashboard/DashboardFragment.kt       |   4 +
 .../view/settings/SettingsFragment.kt         |  39 ++++
 .../view/settings/SettingsViewModel.kt        |  31 +++
 app/src/main/res/layout/fragment_settings.xml |  59 ++++++
 app/src/main/res/menu/menu_ui.xml             |   5 +
 app/src/main/res/navigation/nav_graph.xml     | 200 ++++++++++--------
 app/src/main/res/values/strings.xml           |   2 +
 9 files changed, 291 insertions(+), 106 deletions(-)
 create mode 100644 app/src/main/java/dev/spikeysanju/expensetracker/data/local/datastore/SettingsDataStore.kt
 create mode 100644 app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsFragment.kt
 create mode 100644 app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsViewModel.kt
 create mode 100644 app/src/main/res/layout/fragment_settings.xml

diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
index 3c7772a..208123b 100644
--- a/.idea/codeStyles/Project.xml
+++ b/.idea/codeStyles/Project.xml
@@ -3,18 +3,9 @@
     <JetCodeStyleSettings>
       <option name="PACKAGES_TO_USE_STAR_IMPORTS">
         <value>
-          <package name="java.util" alias="false" withSubpackages="false" />
-          <package name="kotlinx.android.synthetic" alias="false" withSubpackages="true" />
-          <package name="io.ktor" alias="false" withSubpackages="true" />
-        </value>
-      </option>
-      <option name="PACKAGES_IMPORT_LAYOUT">
-        <value>
-          <package name="" alias="false" withSubpackages="true" />
-          <package name="java" alias="false" withSubpackages="true" />
-          <package name="javax" alias="false" withSubpackages="true" />
-          <package name="kotlin" alias="false" withSubpackages="true" />
-          <package name="" alias="true" withSubpackages="true" />
+          <package name="java.util" withSubpackages="false" static="false" />
+          <package name="kotlinx.android.synthetic" withSubpackages="true" static="false" />
+          <package name="io.ktor" withSubpackages="true" static="false" />
         </value>
       </option>
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/data/local/datastore/SettingsDataStore.kt b/app/src/main/java/dev/spikeysanju/expensetracker/data/local/datastore/SettingsDataStore.kt
new file mode 100644
index 0000000..88fdb3e
--- /dev/null
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/data/local/datastore/SettingsDataStore.kt
@@ -0,0 +1,42 @@
+package dev.spikeysanju.expensetracker.data.local.datastore
+
+import android.content.Context
+import androidx.datastore.preferences.core.booleanPreferencesKey
+import androidx.datastore.preferences.core.edit
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+import javax.inject.Singleton
+
+
+class SettingsDataStore(context: Context) :
+    PrefsDataStore(
+        context,
+        PREF_FILE_SETTINGS
+    ),
+    SettingsImpl {
+
+    // used to get the data from datastore
+    override val biometric: Flow<Boolean>
+        get() = dataStore.data.map { preferences ->
+            val biometric = preferences[BIOMETRIC_KEY] ?: false
+            biometric
+        }
+
+    // used to save the bio-metric preference to datastore
+    override suspend fun saveToDataStore(isBiometricEnabled: Boolean) {
+        dataStore.edit { preferences ->
+            preferences[BIOMETRIC_KEY] = isBiometricEnabled
+        }
+    }
+
+    companion object {
+        private const val PREF_FILE_SETTINGS = "settings_preference"
+        private val BIOMETRIC_KEY = booleanPreferencesKey("biometric_mode")
+    }
+}
+
+@Singleton
+interface SettingsImpl {
+    val biometric: Flow<Boolean>
+    suspend fun saveToDataStore(isBiometricEnabled: Boolean)
+}
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/view/dashboard/DashboardFragment.kt b/app/src/main/java/dev/spikeysanju/expensetracker/view/dashboard/DashboardFragment.kt
index c58636f..24c0324 100644
--- a/app/src/main/java/dev/spikeysanju/expensetracker/view/dashboard/DashboardFragment.kt
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/view/dashboard/DashboardFragment.kt
@@ -280,6 +280,10 @@ class DashboardFragment :
                 findNavController().navigate(R.id.action_dashboardFragment_to_aboutFragment)
                 true
             }
+            R.id.action_settings -> {
+                findNavController().navigate(R.id.action_dashboardFragment_to_settingsFragment)
+                true
+            }
             else -> super.onOptionsItemSelected(item)
         }
     }
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsFragment.kt b/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsFragment.kt
new file mode 100644
index 0000000..e16977c
--- /dev/null
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsFragment.kt
@@ -0,0 +1,39 @@
+package dev.spikeysanju.expensetracker.view.settings
+
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.viewModels
+import androidx.lifecycle.lifecycleScope
+import dagger.hilt.android.AndroidEntryPoint
+import dev.spikeysanju.expensetracker.databinding.FragmentSettingsBinding
+import dev.spikeysanju.expensetracker.view.base.BaseFragment
+import kotlinx.coroutines.flow.first
+
+@AndroidEntryPoint
+class SettingsFragment : BaseFragment<FragmentSettingsBinding, SettingsViewModel>() {
+    override val viewModel: SettingsViewModel by viewModels()
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+
+        // Set the item state
+        lifecycleScope.launchWhenStarted {
+            binding.biometric.isChecked = viewModel.bioMetricPreference.first()
+        }
+
+        initViews()
+    }
+
+    private fun initViews() = with(binding) {
+        biometric.setOnCheckedChangeListener { _, isChecked ->
+            viewModel.setBioMetricLock(isChecked)
+        }
+
+    }
+
+    override fun getViewBinding(inflater: LayoutInflater, container: ViewGroup?) =
+        FragmentSettingsBinding.inflate(inflater, container, false)
+}
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsViewModel.kt b/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsViewModel.kt
new file mode 100644
index 0000000..55d7c04
--- /dev/null
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsViewModel.kt
@@ -0,0 +1,31 @@
+package dev.spikeysanju.expensetracker.view.settings
+
+
+import android.app.Application
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.viewModelScope
+import dagger.hilt.android.lifecycle.HiltViewModel
+import dev.spikeysanju.expensetracker.data.local.datastore.SettingsDataStore
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class SettingsViewModel @Inject constructor(
+    application: Application
+) :
+    AndroidViewModel(application) {
+
+    // init datastore
+    private val settingsDataStore = SettingsDataStore(application)
+
+    // get bio-metric preference
+    val bioMetricPreference = settingsDataStore.biometric
+
+    fun setBioMetricLock(bioMetricLock: Boolean) {
+        viewModelScope.launch(Dispatchers.IO) {
+            settingsDataStore.saveToDataStore(bioMetricLock)
+        }
+    }
+
+}
diff --git a/app/src/main/res/layout/fragment_settings.xml b/app/src/main/res/layout/fragment_settings.xml
new file mode 100644
index 0000000..6aa1733
--- /dev/null
+++ b/app/src/main/res/layout/fragment_settings.xml
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView 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"
+    android:fillViewport="true"
+    android:scrollbars="none">
+
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        tools:context=".view.settings.SettingsFragment">
+
+        <ImageView
+            android:id="@+id/logo"
+            android:layout_width="140dp"
+            android:layout_height="140dp"
+            android:layout_marginTop="@dimen/dimen_64"
+            android:contentDescription="@string/app_name"
+            android:src="@drawable/ic_logo"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <LinearLayout
+            android:layout_marginStart="@dimen/dimen_16"
+            android:layout_marginTop="@dimen/dimen_48"
+            app:layout_constraintTop_toBottomOf="@id/logo"
+            android:orientation="horizontal"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content">
+
+            <TextView
+                android:id="@+id/biometricTitle"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:fontFamily="@font/open_sans_bold"
+                android:text="@string/text_settings_biometric"
+                android:textAppearance="@style/TextAppearance.MaterialComponents.Overline"
+                app:layout_constraintStart_toStartOf="parent"/>
+
+
+            <androidx.appcompat.widget.SwitchCompat
+                android:layout_weight="1"
+                android:id="@+id/biometric"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@id/biometricTitle" />
+
+        </LinearLayout>
+
+
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+</ScrollView>
diff --git a/app/src/main/res/menu/menu_ui.xml b/app/src/main/res/menu/menu_ui.xml
index 21b79d4..542cbb7 100644
--- a/app/src/main/res/menu/menu_ui.xml
+++ b/app/src/main/res/menu/menu_ui.xml
@@ -20,5 +20,10 @@
         android:enabled="true"
         android:title="@string/text_about"
         app:showAsAction="never" />
+    <item
+        android:id="@+id/action_settings"
+        android:enabled="true"
+        android:title="@string/text_settings"
+        app:showAsAction="never" />
 
 </menu>
diff --git a/app/src/main/res/navigation/nav_graph.xml b/app/src/main/res/navigation/nav_graph.xml
index 6926ae6..aed700f 100644
--- a/app/src/main/res/navigation/nav_graph.xml
+++ b/app/src/main/res/navigation/nav_graph.xml
@@ -1,94 +1,106 @@
-<?xml version="1.0" encoding="utf-8"?>
-<navigation 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:id="@+id/nav_graph"
-    app:startDestination="@id/dashboardFragment">
-
-    <fragment
-        android:id="@+id/dashboardFragment"
-        android:name="dev.spikeysanju.expensetracker.view.dashboard.DashboardFragment"
-        android:label="fragment_dashboard"
-        tools:layout="@layout/fragment_dashboard">
-        <action
-            android:id="@+id/action_dashboardFragment_to_addTransactionFragment"
-            app:destination="@id/addTransactionFragment"
-            app:enterAnim="@anim/slide_in_right"
-            app:exitAnim="@anim/slide_out_left"
-            app:popEnterAnim="@anim/slide_in_left"
-            app:popExitAnim="@anim/slide_out_right" />
-        <action
-            android:id="@+id/action_dashboardFragment_to_transactionDetailsFragment"
-            app:destination="@id/transactionDetailsFragment"
-            app:enterAnim="@anim/slide_in_right"
-            app:exitAnim="@anim/slide_out_left"
-            app:popEnterAnim="@anim/slide_in_left"
-            app:popExitAnim="@anim/slide_out_right" />
-        <action
-            android:id="@+id/action_dashboardFragment_to_aboutFragment"
-            app:destination="@id/aboutFragment"
-            app:enterAnim="@anim/slide_in_right"
-            app:exitAnim="@anim/slide_out_left"
-            app:popEnterAnim="@anim/slide_in_left"
-            app:popExitAnim="@anim/slide_out_right" />
-    </fragment>
-    <fragment
-        android:id="@+id/addTransactionFragment"
-        android:name="dev.spikeysanju.expensetracker.view.add.AddTransactionFragment"
-        android:label="fragment_add_transaction"
-        tools:layout="@layout/fragment_add_transaction">
-        <action
-            android:id="@+id/action_addTransactionFragment_to_dashboardFragment"
-            app:destination="@id/dashboardFragment"
-            app:popUpTo="@id/addTransactionFragment"
-            app:popUpToInclusive="true" />
-    </fragment>
-    <fragment
-        android:id="@+id/transactionDetailsFragment"
-        android:name="dev.spikeysanju.expensetracker.view.details.TransactionDetailsFragment"
-        android:label="Details"
-        tools:layout="@layout/fragment_transaction_details">
-        <argument
-            android:name="transaction"
-            app:argType="dev.spikeysanju.expensetracker.model.Transaction" />
-        <action
-            android:id="@+id/action_transactionDetailsFragment_to_editTransactionFragment"
-            app:destination="@id/editTransactionFragment"
-            app:enterAnim="@anim/slide_in_right"
-            app:exitAnim="@anim/slide_out_left"
-            app:popEnterAnim="@anim/slide_in_left"
-            app:popExitAnim="@anim/slide_out_right" />
-        <action
-            android:id="@+id/action_transactionDetailsFragment_to_errorDialog"
-            app:destination="@id/errorDialog" />
-    </fragment>
-    <fragment
-        android:id="@+id/editTransactionFragment"
-        android:name="dev.spikeysanju.expensetracker.view.edit.EditTransactionFragment"
-        android:label="Edit Transaction"
-        tools:layout="@layout/fragment_edit_transaction">
-        <argument
-            android:name="transaction"
-            app:argType="dev.spikeysanju.expensetracker.model.Transaction" />
-        <action
-            android:id="@+id/edit_to_details"
-            app:destination="@id/transactionDetailsFragment" />
-    </fragment>
-    <fragment
-        android:id="@+id/aboutFragment"
-        android:name="dev.spikeysanju.expensetracker.view.about.AboutFragment"
-        android:label="About"
-        tools:layout="@layout/fragment_about" />
-    <dialog
-        android:id="@+id/errorDialog"
-        android:name="dev.spikeysanju.expensetracker.view.dialog.ErrorDialog"
-        android:label="ErrorDialog"
-        tools:layout="@layout/error_dialog_layout">
-        <argument
-            android:name="title"
-            app:argType="string" />
-        <argument
-            android:name="message"
-            app:argType="string" />
-    </dialog>
-</navigation>
+<?xml version="1.0" encoding="utf-8"?>
+<navigation 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:id="@+id/nav_graph"
+    app:startDestination="@id/dashboardFragment">
+
+    <fragment
+        android:id="@+id/dashboardFragment"
+        android:name="dev.spikeysanju.expensetracker.view.dashboard.DashboardFragment"
+        android:label="fragment_dashboard"
+        tools:layout="@layout/fragment_dashboard">
+        <action
+            android:id="@+id/action_dashboardFragment_to_addTransactionFragment"
+            app:destination="@id/addTransactionFragment"
+            app:enterAnim="@anim/slide_in_right"
+            app:exitAnim="@anim/slide_out_left"
+            app:popEnterAnim="@anim/slide_in_left"
+            app:popExitAnim="@anim/slide_out_right" />
+        <action
+            android:id="@+id/action_dashboardFragment_to_transactionDetailsFragment"
+            app:destination="@id/transactionDetailsFragment"
+            app:enterAnim="@anim/slide_in_right"
+            app:exitAnim="@anim/slide_out_left"
+            app:popEnterAnim="@anim/slide_in_left"
+            app:popExitAnim="@anim/slide_out_right" />
+        <action
+            android:id="@+id/action_dashboardFragment_to_aboutFragment"
+            app:destination="@id/aboutFragment"
+            app:enterAnim="@anim/slide_in_right"
+            app:exitAnim="@anim/slide_out_left"
+            app:popEnterAnim="@anim/slide_in_left"
+            app:popExitAnim="@anim/slide_out_right" />
+        <action
+            android:id="@+id/action_dashboardFragment_to_settingsFragment"
+            app:destination="@id/settingsFragment"
+            app:enterAnim="@anim/slide_in_right"
+            app:exitAnim="@anim/slide_out_left"
+            app:popEnterAnim="@anim/slide_in_left"
+            app:popExitAnim="@anim/slide_out_right" />
+    </fragment>
+    <fragment
+        android:id="@+id/addTransactionFragment"
+        android:name="dev.spikeysanju.expensetracker.view.add.AddTransactionFragment"
+        android:label="fragment_add_transaction"
+        tools:layout="@layout/fragment_add_transaction">
+        <action
+            android:id="@+id/action_addTransactionFragment_to_dashboardFragment"
+            app:destination="@id/dashboardFragment"
+            app:popUpTo="@id/addTransactionFragment"
+            app:popUpToInclusive="true" />
+    </fragment>
+    <fragment
+        android:id="@+id/transactionDetailsFragment"
+        android:name="dev.spikeysanju.expensetracker.view.details.TransactionDetailsFragment"
+        android:label="Details"
+        tools:layout="@layout/fragment_transaction_details">
+        <argument
+            android:name="transaction"
+            app:argType="dev.spikeysanju.expensetracker.model.Transaction" />
+        <action
+            android:id="@+id/action_transactionDetailsFragment_to_editTransactionFragment"
+            app:destination="@id/editTransactionFragment"
+            app:enterAnim="@anim/slide_in_right"
+            app:exitAnim="@anim/slide_out_left"
+            app:popEnterAnim="@anim/slide_in_left"
+            app:popExitAnim="@anim/slide_out_right" />
+        <action
+            android:id="@+id/action_transactionDetailsFragment_to_errorDialog"
+            app:destination="@id/errorDialog" />
+    </fragment>
+    <fragment
+        android:id="@+id/editTransactionFragment"
+        android:name="dev.spikeysanju.expensetracker.view.edit.EditTransactionFragment"
+        android:label="Edit Transaction"
+        tools:layout="@layout/fragment_edit_transaction">
+        <argument
+            android:name="transaction"
+            app:argType="dev.spikeysanju.expensetracker.model.Transaction" />
+        <action
+            android:id="@+id/edit_to_details"
+            app:destination="@id/transactionDetailsFragment" />
+    </fragment>
+    <fragment
+        android:id="@+id/aboutFragment"
+        android:name="dev.spikeysanju.expensetracker.view.about.AboutFragment"
+        android:label="About"
+        tools:layout="@layout/fragment_about" />
+    <fragment
+        android:id="@+id/settingsFragment"
+        android:name="dev.spikeysanju.expensetracker.view.settings.SettingsFragment"
+        android:label="Settings"
+        tools:layout="@layout/fragment_settings" />
+    <dialog
+        android:id="@+id/errorDialog"
+        android:name="dev.spikeysanju.expensetracker.view.dialog.ErrorDialog"
+        android:label="ErrorDialog"
+        tools:layout="@layout/error_dialog_layout">
+        <argument
+            android:name="title"
+            app:argType="string" />
+        <argument
+            android:name="message"
+            app:argType="string" />
+    </dialog>
+</navigation>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 7725c30..3163ab0 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -37,5 +37,7 @@
     <string name="share_message">\%s \nAmount: %s, \nTransaction-Type: %s, \nTag: %s, \nDate: %s, \nNote: %s, \nCreatedAt: %s \n\nVisit: https://github.com/Spikeysanju/Expenso</string>
     <string name="text_transaction_empty_title">No Transaction Yet!</string>
     <string name="text_transaction_empty_desc">After your first transaction you will be able to view it here</string>
+    <string name="text_settings">Settings</string>
+    <string name="text_settings_biometric">Bio-metric Security</string>
 
 </resources>

From 7331969fa2e60ea7806bc8ce74855d4fda0a14d8 Mon Sep 17 00:00:00 2001
From: maifeeulasad <maifeeulasad@gmail.com>
Date: Fri, 19 Mar 2021 13:52:14 +0600
Subject: [PATCH 4/7] require bio-metric based on bio-metric settings

---
 .../expensetracker/view/main/MainActivity.kt       | 14 +++++++++++++-
 .../view/settings/SettingsFragment.kt              |  4 ++--
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt b/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt
index a5f08f9..b4293df 100644
--- a/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt
@@ -6,6 +6,7 @@ import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
 import androidx.biometric.BiometricPrompt
 import androidx.core.content.ContextCompat
+import androidx.lifecycle.lifecycleScope
 import androidx.navigation.NavController
 import androidx.navigation.fragment.NavHostFragment
 import androidx.navigation.ui.AppBarConfiguration
@@ -17,6 +18,8 @@ import dev.spikeysanju.expensetracker.databinding.ActivityMainBinding
 import dev.spikeysanju.expensetracker.repo.TransactionRepo
 import dev.spikeysanju.expensetracker.utils.viewModelFactory
 import dev.spikeysanju.expensetracker.view.main.viewmodel.TransactionViewModel
+import dev.spikeysanju.expensetracker.view.settings.SettingsViewModel
+import kotlinx.coroutines.flow.first
 import java.util.concurrent.Executor
 import kotlin.system.exitProcess
 
@@ -34,6 +37,10 @@ class MainActivity : AppCompatActivity() {
         viewModelFactory { TransactionViewModel(this.application, repo) }
     }
 
+    private val settingsViewModel: SettingsViewModel by viewModels{
+        viewModelFactory { SettingsViewModel(this.application) }
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         val binding = ActivityMainBinding.inflate(layoutInflater)
@@ -45,7 +52,12 @@ class MainActivity : AppCompatActivity() {
          */
         viewModel
 
-        authenticate()
+
+        // Set the item state
+        lifecycleScope.launchWhenStarted {
+            if(settingsViewModel.bioMetricPreference.first())
+                authenticate()
+        }
 
         initViews(binding)
         observeNavElements(binding, navHostFragment.navController)
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsFragment.kt b/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsFragment.kt
index e16977c..ec9ca26 100644
--- a/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsFragment.kt
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsFragment.kt
@@ -28,8 +28,8 @@ class SettingsFragment : BaseFragment<FragmentSettingsBinding, SettingsViewModel
     }
 
     private fun initViews() = with(binding) {
-        biometric.setOnCheckedChangeListener { _, isChecked ->
-            viewModel.setBioMetricLock(isChecked)
+        biometric.setOnCheckedChangeListener { _, biometricEnabled ->
+            viewModel.setBioMetricLock(biometricEnabled)
         }
 
     }

From 3d02dde659ce98e00444510b2f20328d5536f966 Mon Sep 17 00:00:00 2001
From: maifeeulasad <maifeeulasad@gmail.com>
Date: Fri, 19 Mar 2021 14:13:07 +0600
Subject: [PATCH 5/7] #52 ready for pull

---
 .../dev/spikeysanju/expensetracker/view/main/MainActivity.kt   | 2 --
 .../expensetracker/view/settings/SettingsFragment.kt           | 3 +--
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt b/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt
index b4293df..2b0f075 100644
--- a/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt
@@ -52,8 +52,6 @@ class MainActivity : AppCompatActivity() {
          */
         viewModel
 
-
-        // Set the item state
         lifecycleScope.launchWhenStarted {
             if(settingsViewModel.bioMetricPreference.first())
                 authenticate()
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsFragment.kt b/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsFragment.kt
index ec9ca26..561b73c 100644
--- a/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsFragment.kt
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/view/settings/SettingsFragment.kt
@@ -15,10 +15,10 @@ import kotlinx.coroutines.flow.first
 @AndroidEntryPoint
 class SettingsFragment : BaseFragment<FragmentSettingsBinding, SettingsViewModel>() {
     override val viewModel: SettingsViewModel by viewModels()
+
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
-
         // Set the item state
         lifecycleScope.launchWhenStarted {
             binding.biometric.isChecked = viewModel.bioMetricPreference.first()
@@ -31,7 +31,6 @@ class SettingsFragment : BaseFragment<FragmentSettingsBinding, SettingsViewModel
         biometric.setOnCheckedChangeListener { _, biometricEnabled ->
             viewModel.setBioMetricLock(biometricEnabled)
         }
-
     }
 
     override fun getViewBinding(inflater: LayoutInflater, container: ViewGroup?) =

From ca9ad274df024e7e6d83a742d501888005c109b3 Mon Sep 17 00:00:00 2001
From: maifeeulasad <maifeeulasad@gmail.com>
Date: Sun, 28 Mar 2021 16:14:58 +0600
Subject: [PATCH 6/7] auth fragment - for authentication and as entry point on
 nav_graph.xml + refactored PrefsDataStore, as it is being used in multiple
 class across multiple files

now without proper authentication app can't be used, as well as even the values from different views can't be seen
---
 .../data/local/datastore/PrefsDataStore.kt    | 11 +++
 .../data/local/datastore/UIModeDataStore.kt   |  6 --
 .../expensetracker/view/auth/AuthFragment.kt  | 69 +++++++++++++++++++
 .../expensetracker/view/auth/AuthViewModel.kt | 24 +++++++
 .../expensetracker/view/main/MainActivity.kt  | 46 -------------
 app/src/main/res/layout/fragment_auth.xml     | 29 ++++++++
 app/src/main/res/navigation/nav_graph.xml     | 16 ++++-
 7 files changed, 148 insertions(+), 53 deletions(-)
 create mode 100644 app/src/main/java/dev/spikeysanju/expensetracker/data/local/datastore/PrefsDataStore.kt
 create mode 100644 app/src/main/java/dev/spikeysanju/expensetracker/view/auth/AuthFragment.kt
 create mode 100644 app/src/main/java/dev/spikeysanju/expensetracker/view/auth/AuthViewModel.kt
 create mode 100644 app/src/main/res/layout/fragment_auth.xml

diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/data/local/datastore/PrefsDataStore.kt b/app/src/main/java/dev/spikeysanju/expensetracker/data/local/datastore/PrefsDataStore.kt
new file mode 100644
index 0000000..6b18705
--- /dev/null
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/data/local/datastore/PrefsDataStore.kt
@@ -0,0 +1,11 @@
+package dev.spikeysanju.expensetracker.data.local.datastore
+
+import android.content.Context
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.createDataStore
+
+
+abstract class PrefsDataStore(context: Context, fileName: String) {
+    internal val dataStore: DataStore<Preferences> = context.createDataStore(fileName)
+}
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/data/local/datastore/UIModeDataStore.kt b/app/src/main/java/dev/spikeysanju/expensetracker/data/local/datastore/UIModeDataStore.kt
index 33b1fe5..ba0f28b 100644
--- a/app/src/main/java/dev/spikeysanju/expensetracker/data/local/datastore/UIModeDataStore.kt
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/data/local/datastore/UIModeDataStore.kt
@@ -1,18 +1,12 @@
 package dev.spikeysanju.expensetracker.data.local.datastore
 
 import android.content.Context
-import androidx.datastore.core.DataStore
-import androidx.datastore.preferences.core.Preferences
 import androidx.datastore.preferences.core.booleanPreferencesKey
 import androidx.datastore.preferences.core.edit
-import androidx.datastore.preferences.createDataStore
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.map
 import javax.inject.Singleton
 
-abstract class PrefsDataStore(context: Context, fileName: String) {
-    internal val dataStore: DataStore<Preferences> = context.createDataStore(fileName)
-}
 
 class UIModeDataStore(context: Context) :
     PrefsDataStore(
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/view/auth/AuthFragment.kt b/app/src/main/java/dev/spikeysanju/expensetracker/view/auth/AuthFragment.kt
new file mode 100644
index 0000000..fbad2be
--- /dev/null
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/view/auth/AuthFragment.kt
@@ -0,0 +1,69 @@
+package dev.spikeysanju.expensetracker.view.auth
+
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.biometric.BiometricPrompt
+import androidx.core.content.ContextCompat
+import androidx.fragment.app.viewModels
+import androidx.lifecycle.lifecycleScope
+import androidx.navigation.fragment.findNavController
+import dagger.hilt.android.AndroidEntryPoint
+import dev.spikeysanju.expensetracker.R
+import dev.spikeysanju.expensetracker.databinding.FragmentAuthBinding
+import dev.spikeysanju.expensetracker.view.base.BaseFragment
+import kotlinx.coroutines.flow.first
+import kotlin.system.exitProcess
+
+@AndroidEntryPoint
+class AuthFragment : BaseFragment<FragmentAuthBinding, AuthViewModel>() {
+    override val viewModel: AuthViewModel by viewModels()
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+
+        lifecycleScope.launchWhenStarted {
+            if(viewModel.bioMetricPreference.first())
+                authenticate()
+        }
+    }
+
+    override fun getViewBinding(inflater: LayoutInflater, container: ViewGroup?) =
+        FragmentAuthBinding.inflate(inflater, container, false)
+
+
+    private fun authenticate(){
+        val executor = ContextCompat.getMainExecutor(requireContext())
+        val biometricPrompt = BiometricPrompt(this, executor,
+            object : BiometricPrompt.AuthenticationCallback() {
+                override fun onAuthenticationSucceeded(
+                    result: BiometricPrompt.AuthenticationResult) {
+                    super.onAuthenticationSucceeded(result)
+                    findNavController().navigate(R.id.action_authFragment_to_dashboardFragment)
+                }
+
+                override fun onAuthenticationFailed() {
+                    super.onAuthenticationFailed()
+                    //todo: show message wait for a second; static err code
+                    exitProcess(-1)
+                }
+
+                override fun onAuthenticationError(errorCode: Int,
+                                                   errString: CharSequence) {
+                    super.onAuthenticationError(errorCode, errString)
+                    //todo: show message wait for a second; static err code
+                    exitProcess(-2)
+                }
+            })
+
+        val promptInfo = BiometricPrompt.PromptInfo.Builder()
+            .setTitle("Please complete bio-metric login to use Expenso")
+            .setNegativeButtonText("Exit")
+            .build()
+        biometricPrompt.authenticate(promptInfo)
+    }
+
+}
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/view/auth/AuthViewModel.kt b/app/src/main/java/dev/spikeysanju/expensetracker/view/auth/AuthViewModel.kt
new file mode 100644
index 0000000..083742d
--- /dev/null
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/view/auth/AuthViewModel.kt
@@ -0,0 +1,24 @@
+package dev.spikeysanju.expensetracker.view.auth
+
+
+import android.app.Application
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.viewModelScope
+import dagger.hilt.android.lifecycle.HiltViewModel
+import dev.spikeysanju.expensetracker.data.local.datastore.SettingsDataStore
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class AuthViewModel @Inject constructor(
+    application: Application
+) :
+    AndroidViewModel(application) {
+
+    // init datastore
+    private val settingsDataStore = SettingsDataStore(application)
+
+    // get bio-metric preference
+    val bioMetricPreference = settingsDataStore.biometric
+}
diff --git a/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt b/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt
index 2b0f075..d639603 100644
--- a/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt
+++ b/app/src/main/java/dev/spikeysanju/expensetracker/view/main/MainActivity.kt
@@ -28,19 +28,11 @@ class MainActivity : AppCompatActivity() {
     private lateinit var navHostFragment: NavHostFragment
     private lateinit var appBarConfiguration: AppBarConfiguration
 
-    private lateinit var executor: Executor
-    private lateinit var biometricPrompt: BiometricPrompt
-    private lateinit var promptInfo: BiometricPrompt.PromptInfo
-
     private val repo by lazy { TransactionRepo(AppDatabase(this)) }
     private val viewModel: TransactionViewModel by viewModels {
         viewModelFactory { TransactionViewModel(this.application, repo) }
     }
 
-    private val settingsViewModel: SettingsViewModel by viewModels{
-        viewModelFactory { SettingsViewModel(this.application) }
-    }
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         val binding = ActivityMainBinding.inflate(layoutInflater)
@@ -52,11 +44,6 @@ class MainActivity : AppCompatActivity() {
          */
         viewModel
 
-        lifecycleScope.launchWhenStarted {
-            if(settingsViewModel.bioMetricPreference.first())
-                authenticate()
-        }
-
         initViews(binding)
         observeNavElements(binding, navHostFragment.navController)
     }
@@ -101,37 +88,4 @@ class MainActivity : AppCompatActivity() {
         return super.onSupportNavigateUp()
     }
 
-    private fun authenticate(){
-        executor = ContextCompat.getMainExecutor(this)
-        biometricPrompt = BiometricPrompt(this, executor,
-            object : BiometricPrompt.AuthenticationCallback() {
-                override fun onAuthenticationSucceeded(
-                    result: BiometricPrompt.AuthenticationResult) {
-                    super.onAuthenticationSucceeded(result)
-                    Toast.makeText(applicationContext,
-                        "Welcome to Expenso", Toast.LENGTH_LONG)
-                        .show()
-                }
-
-                override fun onAuthenticationFailed() {
-                    super.onAuthenticationFailed()
-                    //todo: show message wait for a second; static err code
-                    exitProcess(-1)
-                }
-
-                override fun onAuthenticationError(errorCode: Int,
-                                                   errString: CharSequence) {
-                    super.onAuthenticationError(errorCode, errString)
-                    //todo: show message wait for a second; static err code
-                    exitProcess(-2)
-                }
-            })
-
-        promptInfo = BiometricPrompt.PromptInfo.Builder()
-            .setTitle("Please complete bio-metric login to continue")
-            .setNegativeButtonText("Exit")
-            .build()
-        biometricPrompt.authenticate(promptInfo)
-    }
-
 }
diff --git a/app/src/main/res/layout/fragment_auth.xml b/app/src/main/res/layout/fragment_auth.xml
new file mode 100644
index 0000000..8e206f5
--- /dev/null
+++ b/app/src/main/res/layout/fragment_auth.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView 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"
+    android:fillViewport="true"
+    android:scrollbars="none">
+
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        tools:context=".view.auth.AuthFragment">
+
+        <ImageView
+            android:id="@+id/logo"
+            android:layout_width="140dp"
+            android:layout_height="140dp"
+            android:layout_marginTop="@dimen/dimen_64"
+            android:contentDescription="@string/app_name"
+            android:src="@drawable/ic_logo"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+</ScrollView>
diff --git a/app/src/main/res/navigation/nav_graph.xml b/app/src/main/res/navigation/nav_graph.xml
index aed700f..406613d 100644
--- a/app/src/main/res/navigation/nav_graph.xml
+++ b/app/src/main/res/navigation/nav_graph.xml
@@ -3,7 +3,7 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/nav_graph"
-    app:startDestination="@id/dashboardFragment">
+    app:startDestination="@id/authFragment">
 
     <fragment
         android:id="@+id/dashboardFragment"
@@ -91,6 +91,20 @@
         android:name="dev.spikeysanju.expensetracker.view.settings.SettingsFragment"
         android:label="Settings"
         tools:layout="@layout/fragment_settings" />
+
+    <fragment
+        android:id="@+id/authFragment"
+        android:name="dev.spikeysanju.expensetracker.view.auth.AuthFragment"
+        android:label="Authentication"
+        tools:layout="@layout/fragment_auth" >
+        <action
+            android:id="@+id/action_authFragment_to_dashboardFragment"
+            app:destination="@id/dashboardFragment"
+            app:enterAnim="@anim/slide_in_right"
+            app:exitAnim="@anim/slide_out_left"
+            app:popEnterAnim="@anim/slide_in_left"
+            app:popExitAnim="@anim/slide_out_right" />
+    </fragment>
     <dialog
         android:id="@+id/errorDialog"
         android:name="dev.spikeysanju.expensetracker.view.dialog.ErrorDialog"

From 5729e542b9eae8d906fbe3d2aec1965302e2e7fb Mon Sep 17 00:00:00 2001
From: maifeeulasad <maifeeulasad@gmail.com>
Date: Sun, 28 Mar 2021 16:25:41 +0600
Subject: [PATCH 7/7] clear authFragment from navigation stack, else on back
 pressed from dashboardFragment it would appear

---
 app/src/main/res/navigation/nav_graph.xml | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/app/src/main/res/navigation/nav_graph.xml b/app/src/main/res/navigation/nav_graph.xml
index 406613d..8b6945b 100644
--- a/app/src/main/res/navigation/nav_graph.xml
+++ b/app/src/main/res/navigation/nav_graph.xml
@@ -101,9 +101,10 @@
             android:id="@+id/action_authFragment_to_dashboardFragment"
             app:destination="@id/dashboardFragment"
             app:enterAnim="@anim/slide_in_right"
-            app:exitAnim="@anim/slide_out_left"
             app:popEnterAnim="@anim/slide_in_left"
-            app:popExitAnim="@anim/slide_out_right" />
+            app:launchSingleTop="true"
+            app:popUpTo="@+id/nav_graph"
+            app:popUpToInclusive="true" />
     </fragment>
     <dialog
         android:id="@+id/errorDialog"