show file name at ReadTextActivity if available

app/src/main/kotlin/com/simplemobiletools/filemanager/pro/activities/ReadTextActivity.kt

@@ -54,13 +54,32 @@ class ReadTextActivity : SimpleActivity() {
         searchPrevBtn = findViewById(R.id.search_previous)
         searchNextBtn = findViewById(R.id.search_next)
         searchClearBtn = findViewById(R.id.search_clear)
+        read_text_view.setTextColor(config.textColor)
 
         if (checkAppSideloading()) {
             return
         }
 
+        val uri = if (intent.extras?.containsKey(REAL_FILE_PATH) == true) {
+            Uri.fromFile(File(intent.extras?.get(REAL_FILE_PATH).toString()))
+        } else {
+            intent.data
+        }
+
+        if (uri == null) {
+            finish()
+            return
+        }
+
+        val filename = getFilenameFromUri(uri)
+        if (filename.isNotEmpty()) {
+            title = filename
+        }
+
         read_text_view.onGlobalLayout {
-            checkIntent()
+            ensureBackgroundThread {
+                checkIntent(uri)
+            }
         }
 
         setupSearchButtons()
@@ -213,20 +232,7 @@ class ReadTextActivity : SimpleActivity() {
         }
     }
 
-    private fun checkIntent() {
-        read_text_view.setTextColor(config.textColor)
-        val uri = if (intent.extras?.containsKey(REAL_FILE_PATH) == true) {
-            Uri.fromFile(File(intent.extras?.get(REAL_FILE_PATH).toString()))
-        } else {
-            intent.data
-        }
-
-        if (uri == null) {
-            finish()
-            return
-        }
-
-        ensureBackgroundThread {
+    private fun checkIntent(uri: Uri) {
         originalText = if (uri.scheme == "file") {
             filePath = uri.path!!
             val file = File(filePath)
@@ -246,11 +252,11 @@ class ReadTextActivity : SimpleActivity() {
                 contentResolver.openInputStream(uri)!!.bufferedReader().use { it.readText() }
             } catch (e: OutOfMemoryError) {
                 showErrorToast(e.toString())
-                    return@ensureBackgroundThread
+                return
             } catch (e: Exception) {
                 showErrorToast(e)
                 finish()
-                    return@ensureBackgroundThread
+                return
             }
         }
 
@@ -263,7 +269,6 @@ class ReadTextActivity : SimpleActivity() {
             }
         }
     }
-    }
 
     private fun setupSearchButtons() {
         searchQueryET.onTextChangeListener {