feat/Add new themes.

app_pojavlauncher/build.gradle

@@ -206,6 +206,7 @@ dependencies {
     implementation 'commons-codec:commons-codec:1.15'
     // implementation 'com.wu-man:android-bsf-api:3.1.3'
     implementation 'androidx.preference:preference:1.2.0'
+    implementation 'androidx.palette:palette:1.0.0'
     //implementation 'androidx.core:core:1.7.0'
     implementation 'androidx.drawerlayout:drawerlayout:1.2.0'
     implementation 'androidx.viewpager2:viewpager2:1.1.0-beta01'
@@ -237,4 +238,4 @@ dependencies {
 
     implementation "net.java.dev.jna:jna:5.13.0@aar"
 
-}
+}

app_pojavlauncher/src/main/java/com/kdt/mcgui/MineButton.java

@@ -24,7 +24,7 @@ public void init() {
             getContext(), R.font.noto_sans_bold));
         setBackground(ResourcesCompat.getDrawable(
             getResources(),
-            R.drawable.mine_button_background, null));
+            R.drawable.mine_button_background, getContext().getTheme()));
         setTextSize(TypedValue.COMPLEX_UNIT_PX,
             getResources().getDimensionPixelSize(R.dimen._13ssp));
         setTextColor(Color.WHITE);
@@ -41,4 +41,4 @@ public void init() {
             return false;
         });
     }
-}
+}

app_pojavlauncher/src/main/java/com/kdt/mcgui/TextProgressBar.java

@@ -34,7 +34,7 @@ public TextProgressBar(Context context, AttributeSet attrs, int defStyleAttr, in
     private String mText = "";
 
     private void init(){
-        setProgressDrawable(ResourcesCompat.getDrawable(getResources(), R.drawable.view_text_progressbar, null));
+        setProgressDrawable(ResourcesCompat.getDrawable(getResources(), R.drawable.view_text_progressbar, getContext().getTheme()));
         setProgress(35);
         mTextPaint = new Paint();
         mTextPaint.setColor(Color.WHITE);
@@ -65,4 +65,4 @@ public final void setText(String text){
     public final void setTextPadding(int padding){
         mTextPadding = padding;
     }
-}
+}

app_pojavlauncher/src/main/java/com/kdt/mcgui/mcAccountSpinner.java

@@ -50,6 +50,8 @@
 import java.util.List;
 import java.util.Objects;
 
+import android.util.TypedValue;
+
 import fr.spse.extended_view.ExtendedTextView;
 
 public class mcAccountSpinner extends AppCompatSpinner implements AdapterView.OnItemSelectedListener {
@@ -125,7 +127,7 @@ public mcAccountSpinner(@NonNull Context context, @Nullable AttributeSet attrs)
 
     /* Triggered when we need to do microsoft login */
     private final ExtraListener<Uri> mMicrosoftLoginListener = (key, value) -> {
-        mLoginBarPaint.setColor(getResources().getColor(R.color.minebutton_color));
+        mLoginBarPaint.setColor(getThemeColor(net.kdt.pojavlaunch.R.attr.copperAccent));
         new MicrosoftBackgroundLogin(false, value.getQueryParameter("code")).performLogin(
                 mProgressListener, mDoneListener, mErrorListener);
         return false;
@@ -151,8 +153,8 @@ public mcAccountSpinner(@NonNull Context context, @Nullable AttributeSet attrs)
     @SuppressLint("ClickableViewAccessibility")
     private void init(){
         // Set visual properties
-        setBackgroundColor(getResources().getColor(R.color.background_status_bar));
-        mLoginBarPaint.setColor(getResources().getColor(R.color.minebutton_color));
+        setBackgroundColor(getThemeColor(net.kdt.pojavlaunch.R.attr.colorBgStatusBar));
+        mLoginBarPaint.setColor(getThemeColor(net.kdt.pojavlaunch.R.attr.copperAccent));
         mLoginBarPaint.setStrokeWidth(getResources().getDimensionPixelOffset(R.dimen._2sdp));
 
         // Set behavior
@@ -284,7 +286,7 @@ private void performLogin(MinecraftAccount minecraftAccount){
         }
         if(minecraftAccount.isLocal()) return;
 
-        mLoginBarPaint.setColor(getResources().getColor(R.color.minebutton_color));
+        mLoginBarPaint.setColor(getThemeColor(net.kdt.pojavlaunch.R.attr.copperAccent));
         if(minecraftAccount.isMicrosoft){
             if(System.currentTimeMillis() > minecraftAccount.expiresAt){
                 // Perform login only if needed
@@ -420,6 +422,10 @@ private void showDeleteDialog(Context context, int position) {
         }
     }
 
-
-
-}
+    /** Resolve a theme colour attribute (e.g. R.attr.copperAccent) to an int colour. */
+    private int getThemeColor(int attr) {
+        TypedValue tv = new TypedValue();
+        getContext().getTheme().resolveAttribute(attr, tv, true);
+        return tv.data;
+    }
+}

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/LauncherActivity.java

@@ -222,6 +222,12 @@ public boolean setFullscreen() {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        // Apply saved colour theme before layout inflation
+        setTheme(net.kdt.pojavlaunch.theme.ThemeManager.getSavedTheme());
+        // Apply force-landscape preference before layout inflation
+        if (LauncherPreferences.DEFAULT_PREF.getBoolean("force_landscape", false)) {
+            setRequestedOrientation(android.content.pm.ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
+        }
         setContentView(R.layout.activity_pojav_launcher);
         FragmentManager fragmentManager = getSupportFragmentManager();
         // If we don't have a back stack root yet...

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/RightPaneHomeFragment.java

@@ -1,7 +1,10 @@
 package net.kdt.pojavlaunch.fragments;
 
+import android.graphics.drawable.Drawable;
 import android.os.Bundle;
+import android.util.TypedValue;
 import android.view.View;
+import android.widget.ImageView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -10,13 +13,18 @@
 import net.kdt.pojavlaunch.R;
 import net.kdt.pojavlaunch.Tools;
 
+import java.io.File;
+
 /**
  * Default content of the right pane in landscape two-pane mode.
- * Shows the cat wallpaper, Wiki and Discord buttons at the top.
+ * Shows a custom background (if set), otherwise a plain transparent pane.
+ * Wiki and Discord buttons are pinned at the top.
  */
 public class RightPaneHomeFragment extends Fragment {
 
     public static final String TAG = "RightPaneHomeFragment";
+    /** File path where the custom launcher background image is stored. */
+    public static final String CUSTOM_BG_PATH = Tools.DIR_DATA + "/custom_launcher_bg";
 
     public RightPaneHomeFragment() {
         super(R.layout.fragment_right_pane_home);
@@ -29,5 +37,43 @@ public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceStat
 
         view.findViewById(R.id.discord_button_pane).setOnClickListener(
                 v -> Tools.openURL(requireActivity(), getString(R.string.discord_invite)));
+
+        loadBackground(view);
+    }
+
+    /**
+     * Called after saving or removing a custom background so the pane
+     * refreshes without needing a full fragment recreate.
+     */
+    public void reloadBackground() {
+        View v = getView();
+        if (v != null) loadBackground(v);
+    }
+
+    private void loadBackground(@NonNull View view) {
+        ImageView wallpaper = view.findViewById(R.id.right_pane_wallpaper);
+        File bgFile = new File(CUSTOM_BG_PATH);
+        if (bgFile.exists()) {
+            Drawable d = Drawable.createFromPath(bgFile.getAbsolutePath());
+            if (d != null) {
+                wallpaper.setImageDrawable(d);
+                wallpaper.setScaleType(ImageView.ScaleType.CENTER_CROP);
+                wallpaper.setBackground(null);
+                wallpaper.setVisibility(View.VISIBLE);
+                return;
+            }
+        }
+        // No custom bg — show the gradient drawable as the pane background if gradient is on,
+        // otherwise stay transparent (root fragment_launcher bg shows through).
+        wallpaper.setImageDrawable(null);
+        TypedValue tv = new TypedValue();
+        view.getContext().getTheme().resolveAttribute(R.attr.bgMainDrawable, tv, true);
+        if (tv.resourceId != 0) {
+            wallpaper.setBackgroundResource(tv.resourceId);
+            wallpaper.setVisibility(View.VISIBLE);
+        } else {
+            wallpaper.setBackground(null);
+            wallpaper.setVisibility(View.GONE);
+        }
     }
 }

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/prefs/screens/LauncherPreferenceExperimentalFragment.java

@@ -1,13 +1,143 @@
 package net.kdt.pojavlaunch.prefs.screens;
 
+import android.app.AlertDialog;
+import android.net.Uri;
 import android.os.Bundle;
+import android.widget.Toast;
+
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts;
+import androidx.annotation.NonNull;
+import androidx.preference.Preference;
+import androidx.preference.SwitchPreferenceCompat;
 
 import net.kdt.pojavlaunch.R;
+import net.kdt.pojavlaunch.fragments.MainMenuFragment;
+import net.kdt.pojavlaunch.fragments.RightPaneHomeFragment;
+import net.kdt.pojavlaunch.theme.ThemeManager;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE;
+import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
 
 public class LauncherPreferenceExperimentalFragment extends LauncherPreferenceFragment {
 
+    private final ActivityResultLauncher<String> mImagePickerLauncher =
+            registerForActivityResult(new ActivityResultContracts.GetContent(), uri -> {
+                if (uri != null) copyImageToBgFile(uri);
+            });
+
     @Override
     public void onCreatePreferences(Bundle b, String str) {
         addPreferencesFromResource(R.xml.pref_experimental);
+        setupForceLandscape();
+        setupCustomBackground();
+        setupColourTheme();
+    }
+
+    // ── Force landscape ───────────────────────────────────────────────────────
+
+    private void setupForceLandscape() {
+        SwitchPreferenceCompat pref = requirePreference("force_landscape", SwitchPreferenceCompat.class);
+        pref.setOnPreferenceChangeListener((preference, newValue) -> {
+            boolean force = Boolean.TRUE.equals(newValue);
+            requireActivity().setRequestedOrientation(
+                    force ? SCREEN_ORIENTATION_SENSOR_LANDSCAPE : SCREEN_ORIENTATION_UNSPECIFIED);
+            return true;
+        });
+
+        SwitchPreferenceCompat gradientPref = requirePreference("enable_bg_gradient", SwitchPreferenceCompat.class);
+        gradientPref.setOnPreferenceChangeListener((preference, newValue) -> {
+            // Save explicitly before recreate — the framework saves after listener returns
+            net.kdt.pojavlaunch.prefs.LauncherPreferences.DEFAULT_PREF.edit()
+                .putBoolean(ThemeManager.KEY_GRADIENT, Boolean.TRUE.equals(newValue))
+                .commit(); // commit() not apply() — must be synchronous before recreate
+            requireActivity().recreate();
+            return true;
+        });
+    }
+
+    // ── Custom background ─────────────────────────────────────────────────────
+
+    private void setupCustomBackground() {
+        requirePreference("set_custom_launcher_bg").setOnPreferenceClickListener(p -> {
+            mImagePickerLauncher.launch("image/*");
+            return true;
+        });
+
+        requirePreference("remove_custom_launcher_bg").setOnPreferenceClickListener(p -> {
+            File bgFile = new File(RightPaneHomeFragment.CUSTOM_BG_PATH);
+            if (bgFile.exists()) bgFile.delete();
+            notifyHomeFragmentBgChanged();
+            toast(R.string.preference_custom_bg_removed);
+            return true;
+        });
+    }
+
+    private void copyImageToBgFile(@NonNull Uri uri) {
+        File bgFile = new File(RightPaneHomeFragment.CUSTOM_BG_PATH);
+        try (InputStream in  = requireContext().getContentResolver().openInputStream(uri);
+             OutputStream out = new FileOutputStream(bgFile)) {
+            if (in == null) throw new Exception("Cannot open URI");
+            byte[] buf = new byte[8192];
+            int len;
+            while ((len = in.read(buf)) != -1) out.write(buf, 0, len);
+            notifyHomeFragmentBgChanged();
+            toast(R.string.preference_custom_bg_set_success);
+        } catch (Exception e) {
+            if (bgFile.exists()) bgFile.delete();
+            toast(R.string.preference_custom_bg_error);
+        }
+    }
+
+    // ── Colour theme ──────────────────────────────────────────────────────────
+
+    private void setupColourTheme() {
+        // Button 1: preset picker + reset
+        requirePreference("colour_theme_presets").setOnPreferenceClickListener(p -> {
+            showPresetDialog();
+            return true;
+        });
+    }
+
+    private void showPresetDialog() {
+        ThemeManager.Preset[] presets = ThemeManager.PRESETS;
+        String[] labels = new String[presets.length + 1];
+        for (int i = 0; i < presets.length; i++) labels[i] = presets[i].name;
+        labels[presets.length] = getString(R.string.preference_colour_reset);
+
+        new AlertDialog.Builder(requireContext())
+            .setTitle(R.string.preference_colour_presets_title)
+            .setItems(labels, (dialog, which) -> {
+                if (which < presets.length) {
+                    ThemeManager.applyPreset(presets[which]);
+                } else {
+                    ThemeManager.resetToDefault();
+                }
+                requireActivity().recreate();
+            })
+            .setNegativeButton(android.R.string.cancel, null)
+            .show();
+    }
+
+    // ── Helpers ───────────────────────────────────────────────────────────────
+
+    private void toast(int resId) {
+        Toast.makeText(requireContext(), resId, Toast.LENGTH_SHORT).show();
+    }
+
+    private void notifyHomeFragmentBgChanged() {
+        MainMenuFragment mmf = (MainMenuFragment) requireActivity()
+                .getSupportFragmentManager()
+                .findFragmentByTag("ROOT");
+        if (mmf == null) return;
+        RightPaneHomeFragment home = (RightPaneHomeFragment) mmf
+                .getChildFragmentManager()
+                .findFragmentByTag(RightPaneHomeFragment.TAG);
+        if (home != null) home.reloadBackground();
     }
-}
+}

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/prefs/screens/LauncherPreferenceFragment.java

@@ -23,7 +23,7 @@ public class LauncherPreferenceFragment extends PreferenceFragmentCompat impleme
 
     @Override
     public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
-        view.setBackgroundColor(getResources().getColor(R.color.background_app));
+        net.kdt.pojavlaunch.theme.ThemeManager.applyToPrefView(view);
         super.onViewCreated(view, savedInstanceState);
     }
 
@@ -84,4 +84,4 @@ protected <T extends Preference> T requirePreference(CharSequence key, Class<T>
         if(preferenceClass.isInstance(preference)) return (T)preference;
         throw new IllegalStateException("Preference "+key+" is not an instance of "+preferenceClass.getSimpleName());
     }
-}
+}