Android how to make an activity return results to the activity which calls it

Question

I have a Location activity that can be called from many activities  such as Sign up and Order  In the Location activity the user enters his location  so the activity Location will return this new location to that activity which called it   So when the Sign up activity calls the Location activity  it has to return the data to the Sign up activity  Another time the Order activity will do the same thing    Note   I know you will tell me that I should post the code  but I am not asking you to give me the code  I just want some tips  links or good threads

User · Answer

If you want to finish and just add a resultCode  without data   you can call setResult int resultCode  before finish     For example       if  everything OK        setResult Activity RESULT OK      OK   use whatever code you want      finish      else      setResult Activity RESULT CANCELED      some error        finish            Then in your calling activity  check the resultCode  to see if we re OK    Override public void onActivityResult int requestCode  int resultCode  Intent data        if  requestCode    someCustomRequestCode            if  resultCode    Activity RESULT OK                   OK                    else if  resultCode   Activity RESULT CANCELED                   something went wrong  -                      Don t forget to call the activity with startActivityForResult intent  someCustomRequestCode

User · Answer

In order to start an activity which should return result to the calling activity  you should do something like below  You should pass the requestcode as shown below in order to identify that you got the result from the activity you started   startActivityForResult new Intent    YourFullyQualifiedClassName     requestCode     In the activity you can make use of setData   to return result   Intent data   new Intent    String text    Result to be returned        ---set the data to pass back--- data setData Uri parse text    setResult RESULT OK  data     ---close the activity--- finish      So then again in the first activity you write the below code in onActivityResult    public void onActivityResult int requestCode  int resultCode  Intent data        if  requestCode    request Code            if  resultCode    RESULT OK                String returnedResult   data getData   toString                   OR                String returnedResult   data getDataString                        EDIT based on your comment  If you want to return three strings  then follow this by making use of key value pairs with intent instead of using Uri   Intent data   new Intent    data putExtra  streetkey   streetname    data putExtra  citykey   cityname    data putExtra  homekey   homename    setResult RESULT OK data   finish      Get them in onActivityResult like below   public void onActivityResult int requestCode  int resultCode  Intent data        if  requestCode    request Code            if  resultCode    RESULT OK                String street   data getStringExtra  streetkey                String city   data getStringExtra  citykey                String home   data getStringExtra  homekey

User · Answer

UPDATE Feb  2021 As in Activity v1 2 0 and Fragment v1 3 0  the new Activity Result APIs have been introduced   The Activity Result APIs provide components for registering for a result  launching the result  and handling the result once it is dispatched by the system   So there is no need of using startActivityForResult and onActivityResult anymore  In order to use the new API  you need to create an ActivityResultLauncher in your origin Activity  specifying the callback that will be run when the destination Activity finishes and returns the desired data  private val intentLauncher       registerForActivityResult ActivityResultContracts StartActivityForResult      result - gt           if  result resultCode    Activity RESULT OK                result data  getStringExtra  quot streetkey quot               result data  getStringExtra  quot citykey quot               result data  getStringExtra  quot homekey quot                    and then  launching your intent whenever you need to  intentLauncher launch Intent this  YourActivity  class java    And to return data from the destination Activity  you just have to add an intent with the values to return to the setResult   method  val data   Intent   data putExtra  quot streetkey quot    quot streetname quot   data putExtra  quot citykey quot    quot cityname quot   data putExtra  quot homekey quot    quot homename quot    setResult Activity RESULT OK  data  finish    For any additional information  please refer to Android Documentation

User · Answer

Your error is in resultCode   Activity RESULT CANCELED  you should instance like resultCode    Activity RESULT CANCELED

[android] Android: how to make an activity return results to the activity which calls it?

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