Hide Security option if no biometric authentication available. Require biometric authentication when going into security settings.

app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/MarkdownBottomBarRecyclerViewAdapter.java

@@ -6,12 +6,12 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.EditText;
 import android.widget.ImageView;
-import android.widget.SeekBar;
 
 import androidx.annotation.NonNull;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
+import com.google.android.material.slider.Slider;
 
 import ml.docilealligator.infinityforreddit.CustomTheme.CustomThemeWrapper;
 import ml.docilealligator.infinityforreddit.R;
@@ -158,7 +158,7 @@ public class MarkdownBottomBarRecyclerViewAdapter extends RecyclerView.Adapter<R
             }
             case MarkdownBottomBarRecyclerViewAdapter.HEADER: {
                 View dialogView = activity.getLayoutInflater().inflate(R.layout.dialog_select_header, null);
-                SeekBar seekBar = dialogView.findViewById(R.id.seek_bar_dialog_select_header);
+                Slider seekBar = dialogView.findViewById(R.id.seek_bar_dialog_select_header);
                 new MaterialAlertDialogBuilder(activity, R.style.MaterialAlertDialogTheme)
                         .setTitle(R.string.select_header_size)
                         .setView(dialogView)
@@ -167,7 +167,7 @@ public class MarkdownBottomBarRecyclerViewAdapter extends RecyclerView.Adapter<R
                             int start = Math.max(commentEditText.getSelectionStart(), 0);
                             int end = Math.max(commentEditText.getSelectionEnd(), 0);
                             String hashTags;
-                            switch (seekBar.getProgress()) {
+                            switch ((int) seekBar.getValue()) {
                                 case 0:
                                     hashTags = "###### ";
                                     break;

app/src/main/java/ml/docilealligator/infinityforreddit/AppComponent.java

@@ -66,6 +66,7 @@ import ml.docilealligator.infinityforreddit.Settings.DownloadLocationPreferenceF
 import ml.docilealligator.infinityforreddit.Settings.GesturesAndButtonsPreferenceFragment;
 import ml.docilealligator.infinityforreddit.Settings.MainPreferenceFragment;
 import ml.docilealligator.infinityforreddit.Settings.NotificationPreferenceFragment;
+import ml.docilealligator.infinityforreddit.Settings.SecurityPreferenceFragment;
 import ml.docilealligator.infinityforreddit.Settings.ThemePreferenceFragment;
 import ml.docilealligator.infinityforreddit.Settings.VideoPreferenceFragment;
 
@@ -203,4 +204,6 @@ public interface AppComponent {
     void inject(CommentFullMarkdownActivity commentFullMarkdownActivity);
 
     void inject(SelectUserFlairActivity selectUserFlairActivity);
+
+    void inject(SecurityPreferenceFragment securityPreferenceFragment);
 }

app/src/main/java/ml/docilealligator/infinityforreddit/Settings/MainPreferenceFragment.java

@@ -1,12 +1,14 @@
 package ml.docilealligator.infinityforreddit.Settings;
 
 
-import android.app.Activity;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 
 import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.biometric.BiometricManager;
+import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
 import androidx.preference.SwitchPreference;
 
@@ -24,6 +26,9 @@ import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 
+import static androidx.biometric.BiometricManager.Authenticators.BIOMETRIC_STRONG;
+import static androidx.biometric.BiometricManager.Authenticators.DEVICE_CREDENTIAL;
+
 public class MainPreferenceFragment extends PreferenceFragmentCompat {
 
     @Inject
@@ -32,13 +37,14 @@ public class MainPreferenceFragment extends PreferenceFragmentCompat {
     @Inject
     @Named("post_feed_scrolled_position_cache")
     SharedPreferences cache;
-    private Activity activity;
+    private AppCompatActivity activity;
 
     @Override
     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
         setPreferencesFromResource(R.xml.main_preferences, rootKey);
         ((Infinity) activity.getApplication()).getAppComponent().inject(this);
 
+        Preference securityPreference = findPreference(SharedPreferencesUtils.SECURITY);
         SwitchPreference savePostFeedScrolledPositionSwitch = findPreference(SharedPreferencesUtils.SAVE_FRONT_PAGE_SCROLLED_POSITION);
         SwitchPreference confirmToExitSwitch = findPreference(SharedPreferencesUtils.CONFIRM_TO_EXIT);
         SwitchPreference nsfwSwitch = findPreference(SharedPreferencesUtils.NSFW_KEY);
@@ -93,11 +99,18 @@ public class MainPreferenceFragment extends PreferenceFragmentCompat {
                 return true;
             });
         }
+
+        BiometricManager biometricManager = BiometricManager.from(activity);
+        if (biometricManager.canAuthenticate(BIOMETRIC_STRONG | DEVICE_CREDENTIAL) != BiometricManager.BIOMETRIC_SUCCESS) {
+            if (securityPreference != null) {
+                securityPreference.setVisible(false);
+            }
+        }
     }
 
     @Override
     public void onAttach(@NonNull Context context) {
         super.onAttach(context);
-        activity = (Activity) context;
+        activity = (AppCompatActivity) context;
     }
 }

app/src/main/java/ml/docilealligator/infinityforreddit/Settings/SecurityPreferenceFragment.java

@@ -1,22 +1,44 @@
 package ml.docilealligator.infinityforreddit.Settings;
 
+import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.biometric.BiometricPrompt;
+import androidx.core.content.ContextCompat;
 import androidx.preference.PreferenceFragmentCompat;
 import androidx.preference.SwitchPreference;
 
 import org.greenrobot.eventbus.EventBus;
 
+import java.util.concurrent.Executor;
+
+import javax.inject.Inject;
+import javax.inject.Named;
+
 import ml.docilealligator.infinityforreddit.Event.ChangeRequireAuthToAccountSectionEvent;
+import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 
+import static androidx.biometric.BiometricManager.Authenticators.BIOMETRIC_STRONG;
+import static androidx.biometric.BiometricManager.Authenticators.DEVICE_CREDENTIAL;
+
 public class SecurityPreferenceFragment extends PreferenceFragmentCompat {
 
+    private AppCompatActivity activity;
+    @Inject
+    @Named("default")
+    SharedPreferences sharedPreferences;
+
     @Override
     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
         setPreferencesFromResource(R.xml.security_preferences, rootKey);
 
+        ((Infinity) activity.getApplication()).getAppComponent().inject(this);
+
         SwitchPreference requireAuthToAccountSectionSwitch = findPreference(SharedPreferencesUtils.REQUIRE_AUTHENTICATION_TO_GO_TO_ACCOUNT_SECTION_IN_NAVIGATION_DRAWER);
 
         if (requireAuthToAccountSectionSwitch != null) {
@@ -26,4 +48,44 @@ public class SecurityPreferenceFragment extends PreferenceFragmentCompat {
             });
         }
     }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        Executor executor = ContextCompat.getMainExecutor(activity);
+        BiometricPrompt biometricPrompt = new BiometricPrompt(SecurityPreferenceFragment.this,
+                executor, new BiometricPrompt.AuthenticationCallback() {
+            @Override
+            public void onAuthenticationError(int errorCode,
+                                              @NonNull CharSequence errString) {
+                super.onAuthenticationError(errorCode, errString);
+                activity.onBackPressed();
+            }
+
+            @Override
+            public void onAuthenticationSucceeded(
+                    @NonNull BiometricPrompt.AuthenticationResult result) {
+                super.onAuthenticationSucceeded(result);
+            }
+
+            @Override
+            public void onAuthenticationFailed() {
+                super.onAuthenticationFailed();
+                activity.onBackPressed();
+            }
+        });
+
+        BiometricPrompt.PromptInfo promptInfo = new BiometricPrompt.PromptInfo.Builder()
+                .setTitle(activity.getString(R.string.unlock))
+                .setAllowedAuthenticators(BIOMETRIC_STRONG | DEVICE_CREDENTIAL)
+                .build();
+
+        biometricPrompt.authenticate(promptInfo);
+    }
+
+    @Override
+    public void onAttach(@NonNull Context context) {
+        super.onAttach(context);
+        this.activity = (AppCompatActivity) context;
+    }
 }

app/src/main/java/ml/docilealligator/infinityforreddit/Utils/SharedPreferencesUtils.java

@@ -126,6 +126,7 @@ public class SharedPreferencesUtils {
     public static final String REQUIRE_AUTHENTICATION_TO_GO_TO_ACCOUNT_SECTION_IN_NAVIGATION_DRAWER = "require_auth_to_account_section";
     public static final String LONG_PRESS_TO_HIDE_TOOLBAR_IN_COMPACT_LAYOUT = "long_press_to_hide_toolbar_in_compact_layout";
     public static final String POST_COMPACT_LAYOUT_TOOLBAR_HIDDEN_BY_DEFAULT = "post_compact_layout_toolbar_hidden_by_default";
+    public static final String SECURITY = "security";
 
     public static final String MAIN_PAGE_TABS_SHARED_PREFERENCES_FILE = "ml.docilealligator.infinityforreddit.main_page_tabs";
     public static final String MAIN_PAGE_TAB_1_TITLE = "_main_page_tab_1_title";

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

@@ -1,37 +1,47 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:paddingStart="16dp"
     android:paddingEnd="16dp">
 
-    <TextView
+    <com.google.android.material.slider.Slider
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_gravity="center_vertical"
-        android:text="@string/header6"
-        android:textColor="?attr/primaryTextColor"
-        android:textSize="?attr/font_default"
-        android:fontFamily="?attr/font_family" />
-
-    <SeekBar
         android:id="@+id/seek_bar_dialog_select_header"
-        android:layout_width="0dp"
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:layout_gravity="center_vertical"
         android:padding="16dp"
-        android:max="5"
+        android:valueFrom="1"
-        android:theme="@style/Widget.AppCompat.SeekBar.Discrete" />
+        android:valueTo="6"
+        android:stepSize="1"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
 
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_gravity="center_vertical"
+        android:layout_gravity="start"
-        android:text="@string/header1"
+        android:text="@string/large"
         android:textColor="?attr/primaryTextColor"
         android:textSize="?attr/font_default"
-        android:fontFamily="?attr/font_family" />
+        android:fontFamily="?attr/font_family"
+        app:layout_constraintTop_toBottomOf="@+id/seek_bar_dialog_select_header"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent" />
 
-</LinearLayout>
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="end"
+        android:text="@string/small"
+        android:textColor="?attr/primaryTextColor"
+        android:textSize="?attr/font_default"
+        android:fontFamily="?attr/font_family"
+        app:layout_constraintTop_toBottomOf="@+id/seek_bar_dialog_select_header"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -859,17 +859,18 @@
 
     <string name="view_full_comment_markdown">View Full Markdown</string>
 
-    <string name="unlock_account_section">Unlock Account Section</string>
-
     <string name="select_user_flair_success">User flair selected</string>
     <string name="select_user_flair_failed">Cannot select user flair</string>
     <string name="select_this_user_flair">Select this user flair?</string>
 
     <string name="select_header_size">Select Header Size</string>
-    <string name="header1">H1</string>
+    <string name="large">Large</string>
-    <string name="header6">H6</string>
+    <string name="small">Small</string>
     <string name="insert_link">Insert Link</string>
     <string name="text_hint">Text</string>
     <string name="link_hint">Link</string>
 
+    <string name="unlock_account_section">Unlock Account Section</string>
+    <string name="unlock">Unlock</string>
+
 </resources>

app/src/main/res/xml/main_preferences.xml

@@ -42,6 +42,7 @@
         app:fragment="ml.docilealligator.infinityforreddit.Settings.DownloadLocationPreferenceFragment" />
 
     <Preference
+        app:key="security"
         app:title="@string/settings_security_title"
         android:icon="@drawable/ic_security_24dp"
         app:fragment="ml.docilealligator.infinityforreddit.Settings.SecurityPreferenceFragment" />