Refactor dark mode to allow multiple themes

app/src/main/java/com/beemdevelopment/aegis/Preferences.java

@@ -43,6 +43,15 @@ public class Preferences {
         return _prefs.getInt("pref_tap_to_reveal_time", 30);
     }
 
+    public int getCurrentTheme() {
+        return _prefs.getInt("pref_current_theme", 0);
+    }
+
+    public void setCurrentTheme(Theme theme) {
+        _prefs.edit().putInt("pref_current_theme", theme.ordinal()).apply();
+
+    }
+
 
     public int getTimeout() {
         return _prefs.getInt("pref_timeout", -1);

app/src/main/java/com/beemdevelopment/aegis/Theme.java

@@ -0,0 +1,19 @@
+package com.beemdevelopment.aegis;
+
+public enum Theme {
+    LIGHT,
+    DARK,
+    AMOLED;
+
+    public static Theme fromInteger(int x) {
+        switch(x) {
+            case 0:
+                return LIGHT;
+            case 1:
+                return DARK;
+            case 2:
+                return AMOLED;
+        }
+        return null;
+    }
+}

app/src/main/java/com/beemdevelopment/aegis/ui/AegisActivity.java

@@ -7,6 +7,7 @@ import android.view.WindowManager;
 import com.beemdevelopment.aegis.AegisApplication;
 import com.beemdevelopment.aegis.Preferences;
 import com.beemdevelopment.aegis.R;
+import com.beemdevelopment.aegis.Theme;
 
 public abstract class AegisActivity extends AppCompatActivity {
     private AegisApplication _app;
@@ -22,7 +23,7 @@ public abstract class AegisActivity extends AppCompatActivity {
         }
 
         // set the theme
-        setPreferredTheme(getPreferences().isDarkModeEnabled());
+        setPreferredTheme(Theme.fromInteger(getPreferences().getCurrentTheme()));
     }
 
     protected AegisApplication getApp() {
@@ -33,11 +34,19 @@ public abstract class AegisActivity extends AppCompatActivity {
         return _app.getPreferences();
     }
 
-    protected void setPreferredTheme(boolean darkMode) {
-        if (darkMode) {
-            setTheme(R.style.AppTheme_Dark);
-        } else {
-            setTheme(R.style.AppTheme);
+    protected void setPreferredTheme(Theme theme) {
+        switch (theme) {
+            case LIGHT:
+                setTheme(R.style.AppTheme);
+                break;
+
+            case DARK:
+                setTheme(R.style.AppTheme_Dark);
+                break;
+
+            case AMOLED:
+                setTheme(R.style.AppTheme_TrueBlack);
+                break;
         }
     }
 }

app/src/main/java/com/beemdevelopment/aegis/ui/EditEntryActivity.java

@@ -30,6 +30,7 @@ import android.widget.TableRow;
 
 import com.amulyakhare.textdrawable.TextDrawable;
 import com.avito.android.krop.KropView;
+import com.beemdevelopment.aegis.Theme;
 import com.beemdevelopment.aegis.encoding.Base32;
 import com.beemdevelopment.aegis.encoding.Base32Exception;
 import com.beemdevelopment.aegis.helpers.EditTextHelper;
@@ -253,15 +254,6 @@ public class EditEntryActivity extends AegisActivity {
         }
     }
 
-    @Override
-    protected void setPreferredTheme(boolean darkMode) {
-        if (darkMode) {
-            setTheme(R.style.AppTheme_Dark);
-        } else {
-            setTheme(R.style.AppTheme);
-        }
-    }
-
     private void openAdvancedSettings() {
         Animation fadeOut = new AlphaAnimation(1, 0);
         fadeOut.setInterpolator(new AccelerateInterpolator());

app/src/main/java/com/beemdevelopment/aegis/ui/PreferencesActivity.java

@@ -2,6 +2,9 @@ package com.beemdevelopment.aegis.ui;
 
 import android.os.Bundle;
 
+import com.beemdevelopment.aegis.R;
+import com.beemdevelopment.aegis.Theme;
+
 public class PreferencesActivity extends AegisActivity {
     private PreferencesFragment _fragment;
 
@@ -36,4 +39,18 @@ public class PreferencesActivity extends AegisActivity {
         outState.putParcelable("result", _fragment.getResult());
         super.onSaveInstanceState(outState);
     }
+
+    @Override
+    protected void setPreferredTheme(Theme theme) {
+        switch (theme) {
+            case LIGHT:
+                setTheme(R.style.AppTheme);
+                break;
+
+            case DARK:
+            case AMOLED:
+                setTheme(R.style.AppTheme_Dark);
+                break;
+        }
+    }
 }

app/src/main/java/com/beemdevelopment/aegis/ui/ScannerActivity.java

@@ -8,6 +8,7 @@ import android.view.Menu;
 import android.view.MenuItem;
 import android.widget.Toast;
 
+import com.beemdevelopment.aegis.Theme;
 import com.google.zxing.BarcodeFormat;
 import com.google.zxing.Result;
 import com.beemdevelopment.aegis.helpers.SquareFinderView;
@@ -57,7 +58,7 @@ public class ScannerActivity extends AegisActivity implements ZXingScannerView.R
     }
 
     @Override
-    protected void setPreferredTheme(boolean darkMode) {
+    protected void setPreferredTheme(Theme theme) {
         setTheme(R.style.AppTheme_Fullscreen);
     }
 

app/src/main/res/xml/preferences.xml

@@ -7,7 +7,7 @@
     <PreferenceCategory
         android:title="Appearance"
         app:iconSpaceReserved="false">
-        <androidx.preference.SwitchPreferenceCompat
+        <Preference
             android:defaultValue="false"
             android:key="pref_dark_mode"
             android:title="@string/pref_dark_mode_title"