How can I communicate between two activities in android?
Communicating activity and fragments
- Step 1 — Define an interface in your fragment. You need to define an interface in your fragment class with all your listeners that your activity will need to implement as callbacks, like this: public class MyFragment extends ListFragment { …
- Step 2 — Implement the interface. @Override.
How do you communicate between service and activity?
We know how much service are important in Android Application Development. We already know that we can communicate with Service from activity just by using method startService() and passing Intent to the argument in the method, or either we can use bindService() to bind the service to the activity with argument Intent.
How do you interact with Android services?
Communication between service and Activity can be done using PendingIntent. For that we can use createPendingResult(). createPendingResult() creates a new PendingIntent object which you can hand to service to use and to send result data back to your activity inside onActivityResult(int, int, Intent) callback.
How can I communicate between two devices?
Wi-Fi peer-to-peer (P2P) allows Android 4.0 (API level 14) or later devices with the appropriate hardware to connect directly to each other via Wi-Fi without an intermediate access point. As was already suggested, sockets are the easiest way to accomplish this if your devices are all connected to a network.
How can use interface in activity in Android?
And now you can just add the interface as an extra to the Intent which starts the other Activity : Intent intent = new Intent(context, OtherActivity. class); intent. putExtra(“interface”, inter); startActivity(intent);
What is a ViewModel Android?
The android. ViewModel is a class that is responsible for preparing and managing the data for an Activity or a Fragment . … It also handles the communication of the Activity / Fragment with the rest of the application (e.g. calling the business logic classes).
What is the difference between activity and service?
An Activity and Service are the basic building blocks for an Android app. Usually, the Activity handles the User Interface (UI) and interactions with the user, while the service handles the tasks based on the user input.
How do I use intent Service?
To use it, extend IntentService and implement onHandleIntent(android. content. Intent) . IntentService will receive the Intents, launch a worker thread, and stop the service as appropriate.
When should you create a service?
Creating a service with non-static functions suits when we want to use the functions inside the particular class i.e. private functions or when another class needs it i.e. public function.
What is the life cycle of services in Android?
Android service is a component that is used to perform operations on the background such as playing music, handle network transactions, interacting content providers etc. It doesn’t has any UI (user interface). The service runs in the background indefinitely even if application is destroyed.
What is the use of Onbind () in android?
A bound service is the server in a client-server interface. It allows components (such as activities) to bind to the service, send requests, receive responses, and perform interprocess communication (IPC).