Calling startIntentSenderForResult from Fragment (Android Billing v3)

Question

The new Android Billing v3 documentation and helper code uses startIntentSenderForResult() when launching a purchase flow. I want to start a purchase flow (and

Answer 1

Edit: android.support.v4.app.Fragment now contains a backwards compatible version of startIntentSenderForResult(), so this answer is obsolete.

Old answer:

As of support library 23.2.0, modifying the requestCode no longer works: FragmentActivity now keeps track of the requests made by its fragments. I added this method to the FragmentActivity that was hosting the Fragment (code based on FragmentActivity.startActivityFromFragment(Fragment, Intent, int, Bundle)):

public void startIntentSenderFromFragment(Fragment fragment, IntentSender intent, int requestCode, @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) throws IntentSender.SendIntentException {
    if (requestCode == -1) {
        startIntentSenderForResult(intent, requestCode, fillInIntent, flagsMask, flagsValues, extraFlags);
        return;
    }

    if ((requestCode & 0xffff0000) != 0) {
        throw new IllegalArgumentException("Can only use lower 16 bits for requestCode");
    }

    try {
        Method method = FragmentActivity.class.getDeclaredMethod("allocateRequestIndex", Fragment.class);
        method.setAccessible(true);
        int requestIndex = (int) method.invoke(this, fragment);
        startIntentSenderForResult(intent, ((requestIndex + 1) << 16) + (requestCode & 0xffff), fillInIntent, flagsMask, flagsValues, extraFlags);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

When calling this, only the passed Fragment will receive the onActivityResult() call.