Intent android studio11/24/2023 ![]() ![]() One of the features of your application is that you give the user the possibility to send the photos he has taken. For example, you have an application that uses the camera to take photos. If only one component is found, Android starts the component directly. If these Intents are send to the Android system it searches for all components which are registered for the specific action and the data type. Or if you want to give the user an option to choose between a list of components to use. Used when you have an idea of what you want to do, but you do not know which component should be launched. In this case you define an explicit intent targeting activityB and then use it to directly call it. You want to launch activity B from activity A. For example, you have an application that has 2 activities. When you know which component you want to launch and you do not want to give the user free control over which component to use. Other components in Android can register to this event via an intent filter.įollowing are 2 types of intents 1.Explicit Intents Intents can be used to signal to the Android system that a certain event has occurred. In other words, you describe your intention. ![]() ![]() Intents are a way of telling Android what you want to do. The data to operate on, such as a person record in the contacts The general action to be performed, such as ACTION_VIEW, The primary pieces of information in an intent are: It is basically a passive data structure holding an abstract description of an action to be performed. Its most significant use is in the launching of activities, where it can be thought of as the glue between activities. It can be used with startActivity to launch an Activity, broadcastIntent to send it to any interested BroadcastReceiver components, and startService(Intent) or bindService(Intent, ServiceConnection, int) to communicate with a Background Service.Īn Intent provides a facility for performing late runtime binding between the code in different applications. Here are additional technical details about Intents from the Android documentation.Īn intent is an abstract description of an operation to be performed. Service orientation to the most granular level, if I may say.Component level reuse within and across applications.Replacing the inbuilt Android applications with custom developed.Mix and match or rather plug and play of components at runtime.This invisible connection between components is achieved through the combination of intents, intent-filters and the Android platform. This means, neither components are aware of each other's existence but can still work together to give the desired result for the end-user. And any other component that exists and has claimed that it can do such a job through intent-filters, is invoked by the Android platform to accomplish the job. One component that wants to invoke another has to only express its intent to do a job. But more often than not, implicit intents are the way to go and that is what is explained here. Of course, Intents can be made to work exactly like API calls by using what are called explicit intents, which will be explained later. API calls are compile-time binding while intent-based calls are.API calls are synchronous while intent-based invocations are.The fundamental differences between API calls and invoking components via intents are: So, it is almost equivalent to parameters passed to API calls. An Intent is basically a message that is passed between components (such as Activities, Services, Broadcast Receivers, and Content Providers).
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