java.lang.IllegalArgumentException: Can only use lower 16 bits for requestCode

android start-activity
CoDe picture CoDe · Aug 27, 2014 · Viewed 30k times · Source

I am writing an application where Activity A launches Activity B using 

startActivityForResult(intent, -101);

but when called, it responded back with following error log:

E/AndroidRuntime( 1708): java.lang.IllegalArgumentException: Can only use lower 16 bits for requestCode
E/AndroidRuntime( 1708):    at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:837)

Probably it could be -101 but I am not sure. Does any one have any idea on this?

Answer

Henry picture Henry · Oct 25, 2015

You get this exception only in android.support.v4.app.FragmentActivity and not when you use android.app.Activity.

startActivityForResult() in FragmentActivity requires the requestCode to be of 16 bits, meaning the range is from 0 to 65535.

Also, validateRequestPermissionsRequestCode in FragmentActivity requires requestCode to be of 16 bits, meaning the range is from 0 to 65535.

For more info(if you want to see the source code) : https://stackoverflow.com/a/33331459/4747587

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