Make app background follow theme and appearance

app/src/main/java/com/cringe_studios/cringe_authenticator/MainActivity.java

@@ -32,6 +32,7 @@ import com.cringe_studios.cringe_authenticator.util.NavigationUtil;
 import com.cringe_studios.cringe_authenticator.util.OTPDatabase;
 import com.cringe_studios.cringe_authenticator.util.SettingsUtil;
 import com.cringe_studios.cringe_authenticator.util.StyledDialogBuilder;
+import com.cringe_studios.cringe_authenticator.util.ThemeUtil;
 import com.cringe_studios.cringe_authenticator_library.OTPType;
 import com.google.mlkit.vision.common.InputImage;
 
@@ -136,6 +137,7 @@ public class MainActivity extends BaseActivity {
 
         binding = ActivityMainBinding.inflate(getLayoutInflater());
         setContentView(binding.getRoot());
+        ThemeUtil.loadBackground(this);
 
         setSupportActionBar(binding.toolbar);
 

app/src/main/java/com/cringe_studios/cringe_authenticator/unlock/UnlockActivity.java

@@ -60,6 +60,7 @@ public class UnlockActivity extends BaseActivity {
 
         binding = ActivityUnlockBinding.inflate(getLayoutInflater());
         setContentView(binding.getRoot());
+        ThemeUtil.loadBackground(this);
 
         if(SettingsUtil.isBiometricEncryption(this) && BiometricUtil.isSupported(this)) {
             Runnable onSuccess = () -> {

app/src/main/java/com/cringe_studios/cringe_authenticator/util/Theme.java

@@ -1,5 +1,6 @@
 package com.cringe_studios.cringe_authenticator.util;
 
+import androidx.annotation.DrawableRes;
 import androidx.annotation.StringRes;
 import androidx.annotation.StyleRes;
 
@@ -7,12 +8,12 @@ import com.cringe_studios.cringe_authenticator.R;
 
 public enum Theme {
 
-    BLUE_GREEN(R.string.theme_blue_green, R.style.Theme_CringeAuthenticator_Blue_Green),
+    BLUE_GREEN(R.string.theme_blue_green, R.style.Theme_CringeAuthenticator_Blue_Green, R.drawable.background_blue_green_light, R.drawable.background_blue_green),
-    RED_BLUE(R.string.theme_red_blue, R.style.Theme_CringeAuthenticator_Red_Blue),
+    RED_BLUE(R.string.theme_red_blue, R.style.Theme_CringeAuthenticator_Red_Blue, R.drawable.background_red_blue_light, R.drawable.background_red_blue),
-    PINK_GREEN(R.string.theme_pink_green, R.style.Theme_CringeAuthenticator_Pink_Green),
+    PINK_GREEN(R.string.theme_pink_green, R.style.Theme_CringeAuthenticator_Pink_Green, R.drawable.background_pink_green_light, R.drawable.background_pink_green),
-    BLUE_YELLOW(R.string.theme_blue_yellow, R.style.Theme_CringeAuthenticator_Blue_Yellow),
+    BLUE_YELLOW(R.string.theme_blue_yellow, R.style.Theme_CringeAuthenticator_Blue_Yellow, R.drawable.background_blue_yellow_light, R.drawable.background_blue_yellow),
-    GREEN_YELLOW(R.string.theme_green_yellow, R.style.Theme_CringeAuthenticator_Green_Yellow),
+    GREEN_YELLOW(R.string.theme_green_yellow, R.style.Theme_CringeAuthenticator_Green_Yellow, R.drawable.background_green_yellow_light, R.drawable.background_green_yellow),
-    ORANGE_TURQUOISE(R.string.theme_orange_turquoise, R.style.Theme_CringeAuthenticator_Orange_Turquoise),
+    ORANGE_TURQUOISE(R.string.theme_orange_turquoise, R.style.Theme_CringeAuthenticator_Orange_Turquoise, R.drawable.background_orange_turquoise_light, R.drawable.background_orange_turquoise),
     ;
 
     @StringRes
@@ -21,9 +22,17 @@ public enum Theme {
     @StyleRes
     private final int style;
 
-    Theme(@StringRes int name, @StyleRes int style) {
+    @DrawableRes
+    private final int lightBackground;
+
+    @DrawableRes
+    private final int darkBackground;
+
+    Theme(@StringRes int name, @StyleRes int style, @DrawableRes int lightBackground, @DrawableRes int darkBackground) {
         this.name = name;
         this.style = style;
+        this.lightBackground = lightBackground;
+        this.darkBackground = darkBackground;
     }
 
     @StringRes
@@ -36,4 +45,13 @@ public enum Theme {
         return style;
     }
 
+    @DrawableRes
+    public int getLightBackground() {
+        return lightBackground;
+    }
+
+    @DrawableRes
+    public int getDarkBackground() {
+        return darkBackground;
+    }
 }

app/src/main/java/com/cringe_studios/cringe_authenticator/util/ThemeUtil.java

@@ -1,6 +1,8 @@
 package com.cringe_studios.cringe_authenticator.util;
 
 import android.annotation.SuppressLint;
+import android.util.Log;
+import android.view.View;
 
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.app.AppCompatDelegate;
@@ -16,4 +18,14 @@ public class ThemeUtil {
         AppCompatDelegate.setDefaultNightMode(SettingsUtil.getAppearance(activity).getValue());
     }
 
+    public static void loadBackground(AppCompatActivity activity) {
+        Theme theme = SettingsUtil.getTheme(activity);
+        Appearance appearance = SettingsUtil.getAppearance(activity);
+
+        View v = activity.findViewById(R.id.app_background);
+        if(v != null) {
+            v.setBackgroundResource(appearance == Appearance.LIGHT ? theme.getLightBackground() : theme.getDarkBackground());
+        }
+    }
+
 }

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

@@ -5,6 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:fitsSystemWindows="true"
+    android:id="@+id/app_background"
     tools:context=".MainActivity">
 
     <com.google.android.material.appbar.AppBarLayout

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

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:background="@drawable/background_blue_green"
+    android:id="@+id/app_background"
     android:padding="16dp">
 
     <TextView