If the user has multiple SMS messaging apps installed on the Android phone, the App chooser will appear with a list of these apps, and the user can choose which one to use.Your app doesn't need code to request permission from the user.The user can add a picture or other attachment in the messaging app, if the messaging app supports adding attachments. This is the simplest choice for sending messages.Use an implicit Intent to launch a messaging app such as Messenger, with the ACTION_SENDTO action.You have two choices for sending SMS messages: The Messenger app itself is governed by user permission. However, your app doesn't need permission to pass a phone number to an installed SMS app, such as Messenger, for sending the message. Just as your app needs the user's permission to use phone features, so also does an app need the user's permission to directly use SMS features. SMS is neither encrypted nor strongly authenticated on either the network or the device.Īccess to the SMS features of an Android device is protected by user permissions. You should not use SMS to send data messages from a web server to your app on a user device. Note: The SMS protocol was primarily designed for user-to-user communication and is not well-suited for apps that want to transfer data.
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