![\"Screenshot_2014-09-08-14-05-48\"](\"http:\/\/appinventor.pevest.com\/wp-content\/uploads\/2014\/09\/Screenshot_2014-09-08-14-05-48.png\")
<\/a><\/p>\nTo create a pop up warning dialog, use the Notifier<\/em> control that appears in the Designer’s Palette:<\/p>\n Drag the Notifier icon into the app user interface design – the Notifier is used\u00a0as a non-visible component, just below the user interface:<\/p>\n Switch to the Blocks view, click on the Notifier1 block to view the available methods. A partial list of methods is shown here – the item circled in red is the one we will use in this example:<\/p>\n In response to an on screen button press (btnNotifyUser’s<\/em> Click<\/em> event), the app displays the dialog message:<\/p>\n <\/p>\n Notifier<\/em> provides a quick and easy way to display short alert messages to the user of the app.<\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" Whether you use Windows, Linux or Mac OS X applications, when the program needs to alert the user (you!) to an issue, the program displays a pop up dialog box with a warning or error message. You can easily create similar warning messages in App Inventor, as shown in this example screen: To create a … Continue reading Display “Warning” and “Alert” box messages in App Inventor apps<\/span> <\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a>This block can be inserted anywhere a processing block is allowed such as the result of an if-then-else conditional block. You can also change the text or background color of the app to something more interesting than the “black and white” default colors shown in this example.<\/p>\n