Table of Contents
What is activity reference?
Reference activities define the work required to carry out specific maintenance activities, as well as the resources required to carry out the work. For every reference activity, you can register the service type, required skills, whether or not a checklist applies, relevant planning data, and so on.
How can I get main activity from another activity?
To create the second activity, follow these steps:
- In the Project window, right-click the app folder and select New > Activity > Empty Activity.
- In the Configure Activity window, enter “DisplayMessageActivity” for Activity Name. Leave all other properties set to their defaults and click Finish.
What is Android activity lifecycle?
An Android activity goes through six major lifecycle stages or callbacks. These are: onCreate() , onStart() , onResume() , onPause() , onStop() , and onDestroy() . The system invokes each of these callbacks as an activity enters a new state.
What is intent and activity in Android?
An intent is to perform an action on the screen. It is mostly used to start activity, send broadcast receiver,start services and send message between two activities. There are two intents available in android as Implicit Intents and Explicit Intents. Here is a sample example to start new activity with old activity.
How do I get data from startActivityForResult?
First you use startActivityForResult() with parameters in the first Activity and if you want to send data from the second Activity to first Activity then pass the value using Intent with the setResult() method and get that data inside the onActivityResult() method in the first Activity .
What is on activity result?
An ActivityResultContract defines the input type needed to produce a result along with the output type of the result. The APIs provide default contracts for basic intent actions like taking a picture, requesting permissions, and so on. You can also create your own custom contracts. });
How can I call a function from another activity in Android?
- Mainactivity main = new MainActivity() Main.doSomeWork():
- You can pass the instance of Mainactivity to other class and call instance.doWork,()
- You can create a static method in Mainactivity and call MainActivity.
- you can implement.
What is pending intent Android?
A PendingIntent itself is simply a reference to a token maintained by the system describing the original data used to retrieve it. This means that, even if its owning application’s process is killed, the PendingIntent itself will remain usable from other processes that have been given it.
What is difference between activity and intent?
Activity is a UI component which you see on your screen. An Intent is a message object which is used to request an action from the same/different app component.
What is the use of startActivityForResult?
By the help of android startActivityForResult() method, we can send information from one activity to another and vice-versa. The android startActivityForResult method, requires a result from the second activity (activity to be invoked).
Can you still use startActivityForResult?
It has deprecated startActivityForResult in favour of registerForActivityResult . It was one of the first fundamentals that any Android developer has learned, and the backbone of Android’s way of communicating between two components.