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 · Accepted 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

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

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

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

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

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