Chore fixes in TextEditorActivity and FtpNotification

app/src/main/java/com/amaze/filemanager/ui/activities/texteditor/TextEditorActivity.java

@@ -123,6 +123,9 @@ public void onCreate(Bundle savedInstanceState) {
     downButton.setOnClickListener(this);
     // downButton.setEnabled(false);
 
+    if (getSupportActionBar() != null) {
+      getSupportActionBar().setDisplayHomeAsUpEnabled(!useNewStack);
+    }
     mainTextView = findViewById(R.id.textEditorMainEditText);
     scrollView = findViewById(R.id.textEditorScrollView);
 
@@ -469,15 +472,15 @@ public void afterTextChanged(Editable editable) {
             }
           };
 
-      if (mainTextView.getText() == null) return;
-
-      searchTextTask =
-          new SearchTextTask(
-              mainTextView.getText().toString(),
-              editable.toString(),
-              onProgressUpdate,
-              onAsyncTaskFinished);
-      searchTextTask.execute();
+      if (mainTextView.getText() != null) {
+        searchTextTask =
+            new SearchTextTask(
+                mainTextView.getText().toString(),
+                editable.toString(),
+                onProgressUpdate,
+                onAsyncTaskFinished);
+        searchTextTask.execute();
+      }
     }
   }
 
@@ -583,26 +586,26 @@ private void highlightCurrentSearchResult(final TextEditorActivityViewModel view
     colorSearchResult(keyValueNew, getAccent());
 
     // scrolling to the highlighted element
-    if (getSupportActionBar() != null) return;
-
-    scrollView.scrollTo(
-        0,
-        (Integer) keyValueNew.getLineNumber()
-            + mainTextView.getLineHeight()
-            + Math.round(mainTextView.getLineSpacingExtra())
-            - getSupportActionBar().getHeight());
+    if (getSupportActionBar() != null) {
+      scrollView.scrollTo(
+          0,
+          (Integer) keyValueNew.getLineNumber()
+              + mainTextView.getLineHeight()
+              + Math.round(mainTextView.getLineSpacingExtra())
+              - getSupportActionBar().getHeight());
+    }
   }
 
   private void colorSearchResult(SearchResultIndex resultIndex, @ColorInt int color) {
-    if (mainTextView.getText() == null) return;
-
-    mainTextView
-        .getText()
-        .setSpan(
-            new BackgroundColorSpan(color),
-            (Integer) resultIndex.getStartCharNumber(),
-            (Integer) resultIndex.getEndCharNumber(),
-            Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+    if (mainTextView.getText() != null) {
+      mainTextView
+          .getText()
+          .setSpan(
+              new BackgroundColorSpan(color),
+              (Integer) resultIndex.getStartCharNumber(),
+              (Integer) resultIndex.getEndCharNumber(),
+              Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+    }
   }
 
   private void cleanSpans(TextEditorActivityViewModel viewModel) {
@@ -612,12 +615,12 @@ private void cleanSpans(TextEditorActivityViewModel viewModel) {
     viewModel.setLine(0);
 
     // clearing textView spans
-    if (mainTextView.getText() == null) return;
-
-    BackgroundColorSpan[] colorSpans =
-        mainTextView.getText().getSpans(0, mainTextView.length(), BackgroundColorSpan.class);
-    for (BackgroundColorSpan colorSpan : colorSpans) {
-      mainTextView.getText().removeSpan(colorSpan);
+    if (mainTextView.getText() != null) {
+      BackgroundColorSpan[] colorSpans =
+          mainTextView.getText().getSpans(0, mainTextView.length(), BackgroundColorSpan.class);
+      for (BackgroundColorSpan colorSpan : colorSpans) {
+        mainTextView.getText().removeSpan(colorSpan);
+      }
     }
   }
 }

app/src/main/java/com/amaze/filemanager/ui/notifications/FtpNotification.java

@@ -31,14 +31,14 @@
 import com.amaze.filemanager.utils.NetworkUtil;
 
 import android.app.Notification;
-import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 
 import androidx.annotation.StringRes;
 import androidx.core.app.NotificationCompat;
+import androidx.core.app.NotificationManagerCompat;
 import androidx.preference.PreferenceManager;
 
 /**
@@ -96,9 +96,7 @@ public static Notification startNotification(Context context, boolean noStopButt
   }
 
   public static void updateNotification(Context context, boolean noStopButton) {
-    String notificationService = Context.NOTIFICATION_SERVICE;
-    NotificationManager notificationManager =
-        (NotificationManager) context.getSystemService(notificationService);
+    NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
 
     SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
     int port = sharedPreferences.getInt(FtpService.PORT_PREFERENCE_KEY, FtpService.DEFAULT_PORT);
@@ -129,8 +127,6 @@ public static void updateNotification(Context context, boolean noStopButton) {
   }
 
   private static void removeNotification(Context context) {
-    String ns = Context.NOTIFICATION_SERVICE;
-    NotificationManager nm = (NotificationManager) context.getSystemService(ns);
-    nm.cancelAll();
+    NotificationManagerCompat.from(context).cancelAll();
   }
 }