What is startActivityForResult?
startActivityForResult(Intent,int) is designed for getting data back from the activity that is started. The Intent describes the activity to be started, and the int is used to identify the activity when it finishes. The status of a finishing activity can be set with setResult.
What is the use of startActivityForResult () method?
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 the alternative for startActivityForResult?
But recently startActivityForResult() method is deprecated in AndroidX. Android came up with ActivityResultCallback (also called Activity Results API) as an alternative for it.
What is requestCode?
The request code is any int value. The request code identifies the return result when the result arrives. ( You can call startActivityForResult more than once before you get any results. When results arrive, you use the request code to distinguish one result from another.
What is the purpose of requestCode in startActivityForResult () function?
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 return types of startActivityForResult in Android?
Options 1) RESULT_OK 2) RESULT_CANCEL 3) RESULT_CRASH 4) A & B.
What is the use of onActivityResult in Android?
When you done with the subsequent activity and returns, the system calls your activity’s onActivityResult() method. This method includes three arguments: @The request code you passed to startActivityForResult() . @A result code specified by the second activity.
What is Result_ok in Android?
RESULT_OK is constant of Activity class. In Activity class you can access directly but in other classes you need to write class name (Activity) also. Use Activity. RESULT_OK instead of RESULT_OK. In your case it will be if (requestCode == CAMERA_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
What is the purpose of super onCreate in Android?
By calling super. onCreate(savedInstanceState); , you tell the Dalvik VM to run your code in addition to the existing code in the onCreate() of the parent class. If you leave out this line, then only your code is run.
What is Lastknownlocation in Android?
Using the Google Play services location APIs, your app can request the last known location of the user’s device. In most cases, you are interested in the user’s current location, which is usually equivalent to the last known location of the device.
What is the use of super onCreate?
By calling super. onCreate(savedInstanceState); , you tell the Dalvik VM to run your code in addition to the existing code in the onCreate() of the parent class. If you leave out this line, then only your code is run. The existing code is ignored completely.
What is the difference between onCreate and onStart Android?
onCreate() is called when the when the activity is first created. onStart() is called when the activity is becoming visible to the user.