Check If Activity Has Been Called for Result
AndroidAndroid ActivityStartactivityforresultAndroid Problem Overview
Is it possible to know if some activity has been called for result, using startActivityForResult()
or if was only started using startActivity()
?
I need to control this, if its called for result the behaviour will be different.
Android Solutions
Solution 1 - Android
When your activity was started just by startActivity()
a getCallingActivity()
method in target activity will return null
.
When it was called by startActivityForResult()
it will return name of calling activity.
See Docs for getCallingActivity()
:
>
> Return the name of the activity that invoked this activity. This is
> who the data in setResult()
will be sent to. You can use this
> information to validate that the recipient is allowed to receive the
> data.
>
> > Note: if the calling activity is not expecting a result (that is it
> did not use the startActivityForResult(Intent, int)
form that
> includes a request code), then the calling package will be null.
>
> Returns
>
> The ComponentName of the activity that will receive your reply, or null if none.
Solution 2 - Android
You can parse a boolean with put extra inside an intent.
//First Activity
Intent i = new Intent(FirstActivity.this, SecondActiviy.class);
boolean isForResult = true;
i.putExtra("for-result", isForResult);
Then on Second Activity get the value:
//Second Activity
boolean isForResult = getIntent().getBooleanExtra("for-result" , false);
This way you know with a global boolean if you start an activity for get a result. If you don't put a boolean extra the default value will be false. Wich means.
//Not necesary at all.
boolean isForResult = false;
You don't need to parse a false boolean.