refactor: migrate away from deprecated onBackPressed()

Author: naveensingh

app/src/main/kotlin/org/fossify/filemanager/activities/DecompressActivity.kt

@@ -87,12 +87,13 @@ class DecompressActivity : SimpleActivity() {
         }
     }
 
-    override fun onBackPressed() {
-        if (currentPath.isEmpty()) {
-            super.onBackPressed()
+    override fun onBackPressedCompat(): Boolean {
+        return if (currentPath.isEmpty()) {
+            false
         } else {
             val newPath = if (currentPath.contains("/")) currentPath.getParentPath() else ""
             updateCurrentPath(newPath)
+            true
         }
     }
 

app/src/main/kotlin/org/fossify/filemanager/activities/MainActivity.kt

@@ -161,26 +161,30 @@ class MainActivity : SimpleActivity() {
         config.lastUsedViewPagerPage = binding.mainViewPager.currentItem
     }
 
-    override fun onBackPressed() {
+    override fun onBackPressedCompat(): Boolean {
         val currentFragment = getCurrentFragment()
         if (binding.mainMenu.isSearchOpen) {
             binding.mainMenu.closeSearch()
+            return true
         } else if (currentFragment is RecentsFragment || currentFragment is StorageFragment) {
-            super.onBackPressed()
+            return false
         } else if ((currentFragment as ItemsFragment).getBreadcrumbs().getItemCount() <= 1) {
             if (!wasBackJustPressed && config.pressBackTwice) {
                 wasBackJustPressed = true
                 toast(R.string.press_back_again)
                 Handler().postDelayed({
                     wasBackJustPressed = false
                 }, BACK_PRESS_TIMEOUT.toLong())
+                return true
             } else {
                 appLockManager.lock()
                 finish()
+                return true
             }
         } else {
             currentFragment.getBreadcrumbs().removeBreadcrumb()
             openPath(currentFragment.getBreadcrumbs().getLastItem().path)
+            return true
         }
     }
 

app/src/main/kotlin/org/fossify/filemanager/activities/ReadTextActivity.kt

@@ -119,22 +119,26 @@ class ReadTextActivity : SimpleActivity() {
         }
     }
 
-    override fun onBackPressed() {
+    override fun onBackPressedCompat(): Boolean {
         val hasUnsavedChanges = originalText != binding.readTextView.text.toString()
-        when {
-            isSearchActive -> closeSearch()
+        return when {
+            isSearchActive -> {
+                closeSearch()
+                true
+            }
             hasUnsavedChanges && System.currentTimeMillis() - lastSavePromptTS > SAVE_DISCARD_PROMPT_INTERVAL -> {
                 lastSavePromptTS = System.currentTimeMillis()
                 ConfirmationAdvancedDialog(this, "", R.string.save_before_closing, R.string.save, R.string.discard) {
                     if (it) {
                         saveText(true)
                     } else {
-                        super.onBackPressed()
+                        performDefaultBack()
                     }
                 }
+                true
             }
 
-            else -> super.onBackPressed()
+            else -> false
         }
     }
 
@@ -232,7 +236,7 @@ class ReadTextActivity : SimpleActivity() {
             }
 
             if (shouldExitAfterSaving) {
-                super.onBackPressed()
+                performDefaultBack()
             }
         } else {
             toast(R.string.unknown_error_occurred)