What are return types of startActivityForResult in Android?
Options 1) RESULT_OK 2) RESULT_CANCEL 3) RESULT_CRASH 4) A & B.
What is startActivityForResult in Android?
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).
What is request code startActivityForResult?
The startActivityForResult method takes an intent and a request code. In the example, the intent points explicitly to the activity being started. The request code is any int value. The request code identifies the return result when the result arrives.
How do I use Kotlin startActivityForResult?
Method Signature
- Create a new project “Build Your First Android App in Kotlin“
- Add following code in “activity_main. …
- Create a new layout file and add the below code. …
- Open the “MainActivity. …
- Create a new Activity and add the below code. …
- Add “SecondActivity.
23 дек. 2019 г.
How do you kill an activity?
Launch your application, open some new Activity, do some work. Hit the Home button (application will be in the background, in stopped state). Kill the Application — easiest way is to just click the red “stop” button in Android Studio. Return back to your application (launch from Recent apps).
Is it possible activity without UI in Android?
The answer is yes it’s possible. Activities don’t have to have a UI. It’s mentioned in the documentation, e.g.: An activity is a single, focused thing that the user can do.
What is requestCode in Android?
The requestCode helps you to identify from which Intent you came back. For example, imagine your Activity A (Main Activity) could call Activity B (Camera Request), Activity C (Audio Recording), Activity D (Select a Contact).
What are activities in android?
An activity provides the window in which the app draws its UI. This window typically fills the screen, but may be smaller than the screen and float on top of other windows. Generally, one activity implements one screen in an app.
What is foreground activity in Android?
A foreground service performs some operation that is noticeable to the user. For example, an audio app would use a foreground service to play an audio track. Foreground services must display a Notification. Foreground services continue running even when the user isn’t interacting with the app.
What is a fragment in Android?
A fragment is an independent Android component which can be used by an activity. A fragment encapsulates functionality so that it is easier to reuse within activities and layouts. A fragment runs in the context of an activity, but has its own life cycle and typically its own user interface.
How do you finish activity with results?
Its a simple as that:
- Create an Intent (the result object)
- Set the result data (you don’t have to return a Uri – you can use the putExtra methods to set any values you want)
- Call setResult on your Activity, giving it the result Intent.
- Call finish on your Activity.
3 мар. 2012 г.
How do you pass intent?
Intent intent = new Intent(getApplicationContext(), SecondActivity. class); intent. putExtra(“Variable name”, “Value you want to pass”); startActivity(intent); Now on the OnCreate method of your SecondActivity you can fetch the extras like this.
What is an interface in Android?
Android provides a variety of pre-built UI components such as structured layout objects and UI controls that allow you to build the graphical user interface for your app. Android also provides other UI modules for special interfaces such as dialogs, notifications, and menus. To get started, read Layouts.
Is it mandatory to call onCreate () in android?
Q 9 – Is it mandatory to call onCreate() and onStart() in android? It is not mandatory, the program will work perfectly without fail, but the programmer has to implement the life cycle of activity.
What is a context in Android?
What is Context in Android? … It is the context of the current state of the application. It can be used to get information regarding the activity and application. It can be used to get access to resources, databases, and shared preferences, and etc. Both the Activity and Application classes extend the Context class.