Android studio toast12/28/2022 ![]()
It only fills the amount of space required for the message and theĬurrent activity remains visible and interactive. ToastsĪ toast provides simple feedback about an operation in a small popup. The main difference between toasts and dialogs is that toasts provide feedback unobtrusively whereas dialogs demand an immediate response. #ANDROID STUDIO TOAST ANDROID#It's up to you to choose the value for it -just make sure you're not using duplicates.The Android docs provide some guideance around toasts, notifications and dialogs. Using setLatestEventInfo you can specify a title, a message, and the Intent that will be invoked when users click on the notification in the expanded view.Īll that's left to do is create an int constant to store an ID so you can keep track of the notification. #ANDROID STUDIO TOAST CODE#The first argument is the context, second is a private request code (don't worry about it for now according to the Android docs it isn't used), third is an Intent object (in this case we're having it start the MainActivity) and the last one is for flags (check the SDK docs for an explanation of these flags). PendingIntent intent = PendingIntent.getActivity(this, 0, new Intent(this, MainActivity.class), 0) Usually you'll want to launch an activity in your application via an Intent: Next, you're going to create a PendingIntent object to specify what you want to happen when the notification is tapped on. Finally, the last parameter is the time that will be displayed in the Notification details. The second is the shortened title that will appear in the top status bar, not the one that you see when you expand the bar. The first parameter is the resource ID of a Drawable (in this case I just used a dummy app icon that was automatically created). The NotificationManager can send out - you guessed it - Notification objects. First off, you're going to need to grab an instance of the device's NotificationManager, a system service. Let's examine that big block of code piece-by-piece. tLatestEventInfo(this, "New E-mail", "You have one unread message.", intent) PendingIntent intent = PendingIntent.getActivity(this, 0, new Intent(this, Main.class), 0) Notification note = new Notification(R.drawable.icon, "New E-mail", System.currentTimeMillis()) ![]() NotificationManager notifManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE) The following is the code necessary to display a notification: ![]() They're handy to do stuff like notifying the user of new, unread e-mail in a background service, even if he's not currently inside the e-mail application (this is exactly what the GMail app does). Notifications are the messages in the status bar at the top of the screen. Only Toast.LENGTH_LONG or Toast.LENGTH_SHORT are accepted values - you can't give it a time in seconds, as the duration is handled on a relative basis, so it could depend on user configuration. The second is the message body and the last argument specifies how long the Toast should stay on screen. #ANDROID STUDIO TOAST DOWNLOAD#Toast.makeText(this, "Your download has resumed.", Toast.LENGTH_LONG).show() Īgain, the first parameter defines the context in which it's displayed. One simple line of code is all that's required to create a Toast: So in plain English: don't use Toasts for critical messages! ![]() ![]() #ANDROID STUDIO TOAST FULL#As Toasts fade away automatically and are quite subtle in their nature, it may not be guaranteed that a user will have taken full notice of it. They're perfect for displaying notifications that don't need too much attention, for example to tell the user that a download has completed. Toasts are a great way to deliver unobtrusive status messages to users, because unlike Alert Dialogs they do not take focus away from the Activity. For a full list of builder methods, visit the API Docs. Note: The most important methods have been covered here. New AlertDialog.Builder(this).setTitle("Argh").setMessage("Watch out!").setNegativeButton("Cancel", null).setPositiveButton("OK", null).setNeutralButton("No", null).show() It's important to note that if you add all three of these buttons, they will be in the same order as the list above, so sometimes you might have to switch "neutral" and "negative" to achieve a desired order. "Save" or "Yes".ĭescribes a "neutral" action such as "Close".ĭescribes a cancellation or simply a "No". Now you're probably wondering why the word "neutral" is contained in that method name, right? You can create three types of buttons in total:ĭescribes an intended action or a confirmation, e.g. You can simply give it a value of null because AlertDialog buttons always close when clicked your OnClickListener would simply handle additional, custom instructions. SetNeutralButton(String, OnClickListener) creates a button with the specified title and OnClickListener to handle anything that should happen on a click. In the snippet above, you're accessing AlertDialog's static Builder class and handing it the context where the dialog will be displayed. ![]()
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