Biometric authentication

app/build.gradle

@@ -4,12 +4,12 @@ plugins {
 
 android {
     namespace 'com.example.dcav2gui'
-    compileSdk 34
+    compileSdk 35
 
     defaultConfig {
         applicationId "com.example.dcav2gui"
         minSdk 24
-        targetSdk 34
+        targetSdk 35
         versionCode 1
         versionName "1.0"
 
@@ -42,7 +42,9 @@ dependencies {
     implementation libs.navigation.ui
     implementation libs.gson
     implementation libs.recyclerview
-    //implementation libs.okhttp
+    implementation libs.biometric
+    implementation libs.activity
+    implementation libs.fragment
     implementation libs.okhttp.v492
     implementation libs.firebase.crashlytics.buildtools
     testImplementation libs.junit

app/src/main/AndroidManifest.xml

@@ -2,6 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
     <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.USE_BIOMETRIC" />
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"

app/src/main/java/com/example/dcav2gui/MainActivity.java

@@ -1,7 +1,17 @@
 package com.example.dcav2gui;
 
+import android.content.ActivityNotFoundException;
+import android.content.Intent;
+import android.os.Build;
+import android.provider.Settings;
 import android.view.MenuItem;
 
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts;
+import androidx.annotation.NonNull;
+import androidx.biometric.BiometricManager;
+import androidx.biometric.BiometricPrompt;
+import androidx.core.content.ContextCompat;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.navigation.NavController;
 import androidx.navigation.Navigation;//
@@ -23,6 +33,7 @@ import com.example.dcav2gui.databinding.ActivityMainBinding;
 
 import java.io.File;
 import java.util.Objects;
+import java.util.concurrent.Executor;
 
 public class MainActivity extends AppCompatActivity {
 
@@ -35,7 +46,11 @@ public class MainActivity extends AppCompatActivity {
     public static InstanceInterface.ExchangeStatsData kucoinCache;
     public static InstanceInterface.ExchangeStatsData okxCache;
 
+    private BiometricPrompt biometricPrompt;
+    private BiometricPrompt.PromptInfo promptInfo;
+    private boolean isAuthenticated = false;
 
+    private ActivityResultLauncher<Intent> enrollBiometricLauncher;
 
     public HomeFragment.HomeCache getHomeViewCache() {
         return homeViewCache;
@@ -70,7 +85,22 @@ public class MainActivity extends AppCompatActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        registerBiometricEnrollLauncher();
+        setupBiometricAuthentication();
+    }
 
+    private void registerBiometricEnrollLauncher() {
+        enrollBiometricLauncher = registerForActivityResult(
+                new ActivityResultContracts.StartActivityForResult(),
+                result -> {
+                    // After returning from enrollment screen, try authentication again
+                    // or initialize the app if enrollment was canceled
+                    setupBiometricAuthentication();
+                }
+        );
+    }
+
+    private void initializeApp() {
         binding = ActivityMainBinding.inflate(getLayoutInflater());
         setContentView(binding.getRoot());
 
@@ -99,6 +129,90 @@ public class MainActivity extends AppCompatActivity {
         }
     }
 
+    private void setupBiometricAuthentication() {
+        BiometricManager biometricManager = BiometricManager.from(this);
+        switch (biometricManager.canAuthenticate(BiometricManager.Authenticators.BIOMETRIC_STRONG | BiometricManager.Authenticators.DEVICE_CREDENTIAL)) {
+            case BiometricManager.BIOMETRIC_SUCCESS:
+                // Device supports biometric authentication
+                setupBiometricPrompt();
+                break;
+            case BiometricManager.BIOMETRIC_ERROR_NO_HARDWARE:
+                // No biometric features available on this device
+                Toast.makeText(this, "Fingerprint authentication not available", Toast.LENGTH_LONG).show();
+                initializeApp(); // Skip to app initialization
+                break;
+            case BiometricManager.BIOMETRIC_ERROR_HW_UNAVAILABLE:
+                // Biometric features are currently unavailable
+                Toast.makeText(this, "Biometric authentication temporarily unavailable", Toast.LENGTH_LONG).show();
+                initializeApp(); // Skip to app initialization
+                break;
+            case BiometricManager.BIOMETRIC_ERROR_NONE_ENROLLED:
+                // No biometrics or PIN enrolled, prompt user to set them up
+                Toast.makeText(this, "No fingerprint or PIN set up on device", Toast.LENGTH_LONG).show();
+
+                // For API 30 and above, direct user to enroll biometrics
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+                    final Intent enrollIntent = new Intent(Settings.ACTION_BIOMETRIC_ENROLL);
+                    enrollIntent.putExtra(Settings.EXTRA_BIOMETRIC_AUTHENTICATORS_ALLOWED,
+                            BiometricManager.Authenticators.BIOMETRIC_STRONG | BiometricManager.Authenticators.DEVICE_CREDENTIAL);
+                    try {
+                        enrollBiometricLauncher.launch(enrollIntent);
+                    } catch (ActivityNotFoundException e) {
+                        initializeApp(); // Skip to app initialization if enrollment activity not found
+                    }
+                } else {
+                    initializeApp(); // Skip to app initialization for older Android versions
+                }
+                break;
+            default:
+                initializeApp(); // Skip to app initialization for any other case
+        }
+    }
+
+    private void setupBiometricPrompt() {
+        Executor executor = ContextCompat.getMainExecutor(this);
+        biometricPrompt = new BiometricPrompt(this, executor,
+                new BiometricPrompt.AuthenticationCallback() {
+                    @Override
+                    public void onAuthenticationError(int errorCode, @NonNull CharSequence errString) {
+                        super.onAuthenticationError(errorCode, errString);
+                        Toast.makeText(getApplicationContext(), "Authentication error: " + errString, Toast.LENGTH_SHORT).show();
+                        // If authentication is canceled or fails multiple times, exit the app
+                        if (errorCode == BiometricPrompt.ERROR_NEGATIVE_BUTTON ||
+                                errorCode == BiometricPrompt.ERROR_USER_CANCELED) {
+                            finish();
+                        } else {
+                            // For other errors, try again
+                            biometricPrompt.authenticate(promptInfo);
+                        }
+                    }
+
+                    @Override
+                    public void onAuthenticationSucceeded(@NonNull BiometricPrompt.AuthenticationResult result) {
+                        super.onAuthenticationSucceeded(result);
+                        Toast.makeText(getApplicationContext(), "Authentication succeeded!", Toast.LENGTH_SHORT).show();
+                        isAuthenticated = true;
+                        initializeApp();
+                    }
+
+                    @Override
+                    public void onAuthenticationFailed() {
+                        super.onAuthenticationFailed();
+                        Toast.makeText(getApplicationContext(), "Authentication failed", Toast.LENGTH_SHORT).show();
+                    }
+                });
+
+        promptInfo = new BiometricPrompt.PromptInfo.Builder()
+                .setTitle("Authenticate to access your app")
+                .setSubtitle("Verify your identity")
+                .setDescription("Use your fingerprint or PIN to access your trading information")
+                .setAllowedAuthenticators(BiometricManager.Authenticators.BIOMETRIC_STRONG | BiometricManager.Authenticators.DEVICE_CREDENTIAL)
+                .build();
+
+        // Start authentication
+        biometricPrompt.authenticate(promptInfo);
+    }
+
     public static SettingsData getGlobalSettings() {
         return globalSettings;
     }

app/src/main/java/com/example/dcav2gui/ui/home/HomeFragment.java

@@ -1190,9 +1190,9 @@ public class HomeFragment extends Fragment {
     public static String timeStampConverter(double timestamp, boolean noDate) {
         long linuxTimestamp = (long) timestamp; // Replace with your timestamp
         Date date = new Date(linuxTimestamp * 1000);
-        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// Multiply by 1000 to convert to milliseconds
+        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.ROOT);// Multiply by 1000 to convert to milliseconds
         if (noDate) {
-            formatter = new SimpleDateFormat("HH:mm:ss");
+            formatter = new SimpleDateFormat("HH:mm:ss", Locale.ROOT);
         }
         return formatter.format(date);
     }

gradle/libs.versions.toml

@@ -1,5 +1,8 @@
 [versions]
-agp = "8.7.3"
+activity = "1.10.1"
+agp = "8.9.0"
+biometric = "1.1.0"
+fragment = "1.8.6"
 junit = "4.13.2"
 junitVersion = "1.2.1"
 espressoCore = "3.6.1"
@@ -18,6 +21,9 @@ recyclerview = "1.3.2"
 recyclerviewVersion = "1.2.1"
 
 [libraries]
+activity = { module = "androidx.activity:activity", version.ref = "activity" }
+biometric = { module = "androidx.biometric:biometric", version.ref = "biometric" }
+fragment = { module = "androidx.fragment:fragment", version.ref = "fragment" }
 junit = { group = "junit", name = "junit", version.ref = "junit" }
 ext-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitVersion" }
 espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Mon Dec 09 08:04:51 ART 2024
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists