validate the inserted resolution

app/src/main/kotlin/com/simplemobiletools/gallery/dialogs/ResizeDialog.kt

@@ -7,6 +7,7 @@ import android.text.TextWatcher
 import android.view.LayoutInflater
 import android.view.WindowManager
 import android.widget.EditText
+import com.simplemobiletools.filepicker.extensions.toast
 import com.simplemobiletools.filepicker.extensions.value
 import com.simplemobiletools.gallery.R
 import com.simplemobiletools.gallery.activities.SimpleActivity
@@ -77,8 +78,16 @@ class ResizeDialog(val activity: SimpleActivity, val size: Point, val callback:
             setCanceledOnTouchOutside(true)
             show()
             getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener({
+                val width = getViewValue(widthView)
+                val height = getViewValue(heightView)
+                if (width <= 0 || height <= 0) {
+                    activity.toast(R.string.invalid_values)
+                    return@setOnClickListener
+                }
+
                 val newSize = Point(getViewValue(widthView), getViewValue(heightView))
                 callback.invoke(newSize)
+                dismiss()
             })
         }
     }

app/src/main/res/values-de/strings.xml

@@ -66,6 +66,7 @@
     <string name="width">Width</string>
     <string name="height">Height</string>
     <string name="keep_aspect_ratio">Keep aspect ratio</string>
+    <string name="invalid_values">Please enter a valid resolution</string>
 
     <!-- Renaming -->
     <string name="rename_file">Datei umbenennen</string>

app/src/main/res/values-es/strings.xml

@@ -66,6 +66,7 @@
     <string name="width">Width</string>
     <string name="height">Height</string>
     <string name="keep_aspect_ratio">Keep aspect ratio</string>
+    <string name="invalid_values">Please enter a valid resolution</string>
 
     <!-- Renaming -->
     <string name="rename_file">Renombrar archivo</string>

app/src/main/res/values-it/strings.xml

@@ -66,6 +66,7 @@
     <string name="width">Width</string>
     <string name="height">Height</string>
     <string name="keep_aspect_ratio">Keep aspect ratio</string>
+    <string name="invalid_values">Please enter a valid resolution</string>
 
     <!-- Renaming -->
     <string name="rename_file">Rinomina file</string>

app/src/main/res/values-ja/strings.xml

@@ -66,6 +66,7 @@
     <string name="width">Width</string>
     <string name="height">Height</string>
     <string name="keep_aspect_ratio">Keep aspect ratio</string>
+    <string name="invalid_values">Please enter a valid resolution</string>
 
     <!-- Renaming -->
     <string name="rename_file">ファイルの名前を変更</string>

app/src/main/res/values-pt-rPT/strings.xml

@@ -66,6 +66,7 @@
     <string name="width">Width</string>
     <string name="height">Height</string>
     <string name="keep_aspect_ratio">Keep aspect ratio</string>
+    <string name="invalid_values">Please enter a valid resolution</string>
 
     <!-- Renaming -->
     <string name="rename_file">Renomear ficheiro</string>

app/src/main/res/values-ru/strings.xml

@@ -67,6 +67,7 @@
     <string name="width">Ширина</string>
     <string name="height">Высота</string>
     <string name="keep_aspect_ratio">Сохранить соотношение сторон</string>
+    <string name="invalid_values">Please enter a valid resolution</string>
 
     <!-- Renaming -->
     <string name="rename_file">Изменение имени файла</string>

app/src/main/res/values-sv/strings.xml

@@ -66,6 +66,7 @@
     <string name="width">Width</string>
     <string name="height">Height</string>
     <string name="keep_aspect_ratio">Keep aspect ratio</string>
+    <string name="invalid_values">Please enter a valid resolution</string>
 
     <!-- Renaming -->
     <string name="rename_file">Döp om fil</string>

app/src/main/res/values-zh/strings.xml

@@ -67,6 +67,7 @@
     <string name="width">Width</string>
     <string name="height">Height</string>
     <string name="keep_aspect_ratio">Keep aspect ratio</string>
+    <string name="invalid_values">Please enter a valid resolution</string>
 
     <!-- Renaming -->
     <string name="rename_file">重命名文件</string>

app/src/main/res/values/strings.xml

@@ -66,6 +66,7 @@
     <string name="width">Width</string>
     <string name="height">Height</string>
     <string name="keep_aspect_ratio">Keep aspect ratio</string>
+    <string name="invalid_values">Please enter a valid resolution</string>
 
     <!-- Renaming -->
     <string name="rename_file">Rename file</string>