Fix navigation bar and notification bar invisible in newer Androids

Also fixes TextEditorActivity menu bar overlap with notification bar on newer Androids.

Author: TranceLove

app/src/main/java/com/amaze/filemanager/ui/activities/superclasses/ThemedActivity.java

@@ -21,7 +21,11 @@
 package com.amaze.filemanager.ui.activities.superclasses;
 
 import static android.os.Build.VERSION.SDK_INT;
+import static android.os.Build.VERSION_CODES.KITKAT;
+import static android.os.Build.VERSION_CODES.KITKAT_WATCH;
 import static android.os.Build.VERSION_CODES.LOLLIPOP;
+import static android.os.Build.VERSION_CODES.M;
+import static android.os.Build.VERSION_CODES.O;
 import static com.amaze.filemanager.ui.fragments.preferencefragments.PreferencesConstants.PREFERENCE_COLORED_NAVIGATION;
 
 import com.amaze.filemanager.R;
@@ -58,6 +62,11 @@
 import androidx.annotation.Nullable;
 import androidx.appcompat.widget.Toolbar;
 import androidx.core.content.ContextCompat;
+import androidx.core.graphics.Insets;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.WindowCompat;
+import androidx.core.view.WindowInsetsCompat;
+import androidx.core.view.WindowInsetsControllerCompat;
 import androidx.preference.PreferenceManager;
 
 /** Created by arpitkh996 on 03-03-2016. */
@@ -86,6 +95,38 @@ public void onReceive(Context context, Intent i) {
         }
       };
 
+  @Override
+  public void setContentView(int layoutResID) {
+    super.setContentView(layoutResID);
+    setupEdgeToEdgeInsets();
+  }
+
+  @Override
+  public void setContentView(View view) {
+    super.setContentView(view);
+    setupEdgeToEdgeInsets();
+  }
+
+  /**
+   * Apply system bar insets as padding on the content view to handle Android 15+ edge-to-edge
+   * enforcement. This ensures content is laid out below the status bar and above the navigation
+   * bar.
+   */
+  private void setupEdgeToEdgeInsets() {
+    if (SDK_INT >= 35) {
+      View contentView = findViewById(android.R.id.content);
+      if (contentView != null) {
+        ViewCompat.setOnApplyWindowInsetsListener(
+            contentView,
+            (v, windowInsets) -> {
+              Insets insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars());
+              v.setPadding(insets.left, insets.top, insets.right, insets.bottom);
+              return WindowInsetsCompat.CONSUMED;
+            });
+      }
+    }
+  }
+
   @Override
   public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
@@ -108,7 +149,7 @@ public void onCreate(Bundle savedInstanceState) {
       getColorPreference().saveColorPreferences(getPrefs(), ColorPreferenceHelper.randomize(this));
     }
 
-    if (SDK_INT >= 21) {
+    if (SDK_INT >= LOLLIPOP) {
       ActivityManager.TaskDescription taskDescription =
           new ActivityManager.TaskDescription(
               getString(R.string.appbar_name),
@@ -132,8 +173,13 @@ public void initStatusBarResources(View parentView) {
     }
 
     Window window = getWindow();
-    if (SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-      if (findViewById(R.id.tab_frame) != null || findViewById(R.id.drawer_layout) == null) {
+    if (SDK_INT >= LOLLIPOP) {
+      boolean useSolidStatusBar =
+          findViewById(R.id.tab_frame) != null
+              || findViewById(R.id.drawer_layout) == null
+              || getAppTheme().equals(AppTheme.LIGHT);
+
+      if (useSolidStatusBar) {
         window.setStatusBarColor(PreferenceUtils.getStatusColor(getPrimary()));
         window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
       } else {
@@ -150,8 +196,19 @@ public void initStatusBarResources(View parentView) {
           window.setNavigationBarColor(Utils.getColor(this, R.color.holo_dark_background));
         }
       }
-    } else if (SDK_INT == Build.VERSION_CODES.KITKAT_WATCH
-        || SDK_INT == Build.VERSION_CODES.KITKAT) {
+
+      // Set light/dark icon appearance for system bars based on theme
+      if (SDK_INT >= M) {
+        WindowInsetsControllerCompat insetsController =
+            WindowCompat.getInsetsController(window, window.getDecorView());
+        boolean isLightTheme = getAppTheme().equals(AppTheme.LIGHT);
+        insetsController.setAppearanceLightStatusBars(isLightTheme);
+        if (SDK_INT >= O) {
+          insetsController.setAppearanceLightNavigationBars(isLightTheme);
+        }
+      }
+    } else if (SDK_INT == KITKAT_WATCH
+        || SDK_INT == KITKAT) {
       setKitkatStatusBarMargin(parentView);
       setKitkatStatusBarTint();
     }
@@ -212,7 +269,7 @@ private Toolbar getToolbar() {
 
   void setTheme() {
     AppTheme theme = getAppTheme();
-    if (Build.VERSION.SDK_INT >= 21) {
+    if (SDK_INT >= LOLLIPOP) {
 
       String stringRepresentation = String.format("#%06X", (0xFFFFFF & getAccent()));