make sure the file exists before trying to read it at the read activity

Author: tibbi

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

@@ -80,7 +80,13 @@ class ReadTextActivity : SimpleActivity() {
 
         val text = if (uri.scheme == "file") {
             filePath = uri.path
-            File(uri.path).readText()
+            val file = File(filePath)
+            if (file.exists()) {
+                file.readText()
+            } else {
+                toast(R.string.unknown_error_occurred)
+                ""
+            }
         } else {
             try {
                 contentResolver.openInputStream(uri).bufferedReader().use { it.readText() }

app/src/main/kotlin/com/simplemobiletools/filemanager/adapters/ItemsAdapter.kt

@@ -95,7 +95,7 @@ class ItemsAdapter(activity: SimpleActivity, var fileDirItems: MutableList<FileD
 
     override fun getSelectableItemCount() = fileDirItems.size
 
-    override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int) = createViewHolder(R.layout.list_item, parent)
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = createViewHolder(R.layout.list_item, parent)
 
     override fun onBindViewHolder(holder: MyRecyclerViewAdapter.ViewHolder, position: Int) {
         val fileDirItem = fileDirItems[position]
@@ -461,10 +461,10 @@ class ItemsAdapter(activity: SimpleActivity, var fileDirItems: MutableList<FileD
         }
     }
 
-    override fun onViewRecycled(holder: ViewHolder?) {
+    override fun onViewRecycled(holder: ViewHolder) {
         super.onViewRecycled(holder)
         if (!activity.isActivityDestroyed()) {
-            Glide.with(activity).clear(holder?.itemView?.item_icon!!)
+            Glide.with(activity).clear(holder.itemView?.item_icon!!)
         }
     }
 

app/src/main/kotlin/com/simplemobiletools/filemanager/adapters/ManageFavoritesAdapter.kt

@@ -34,7 +34,7 @@ class ManageFavoritesAdapter(activity: BaseSimpleActivity, var favorites: ArrayL
 
     override fun getSelectableItemCount() = favorites.size
 
-    override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int) = createViewHolder(R.layout.item_manage_favorite, parent)
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = createViewHolder(R.layout.item_manage_favorite, parent)
 
     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
         val favorite = favorites[position]