Android Dialog Fragments and onActivityResult

问题

I have created an application that presents the user with a dialog fragment with two options: Yes and No.

Should the user select 'Yes', the app will call a Zxing barscan application that is installed on the device, and return the result.

Now, I have a proof of concept for this working. However this proof of concept uses a simple Activity. Therefore I can achieve this Barscan result using activity, not with Dialog Fragment.

The code used in the proof of concept is as follows:

    public void onActivityResult(int requestCode, int resultCode, Intent intent) {
    //retrieve scan result
    IntentResult scanningResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);

    if (scanningResult != null) {
        String scanContent = scanningResult.getContents();      
        String scanFormat = scanningResult.getFormatName();
        formatTxt.setText("FORMAT: " + scanFormat);
        contentTxt.setText("CONTENT: " + scanContent);
        }
    else{
        Toast toast = Toast.makeText(getApplicationContext(), 
            "No scan data received!", Toast.LENGTH_SHORT);
        toast.show();
    }   
}

This code will not work with a dialog fragment. I have been searching and came upon this question.

However it will not integrate, as I cannot access the requestCode, resultCode, or intent required, and am quite confused as to how to do so.

回答1:

You fragment should launch activity by startActivityForResult not getActivity().startActivityForResult

In your activity in onActivityResult call super.onActivityResult and in your fragment on onActivityResult you can put your code which you have posted here.

More info why:

• onActivityResult is not being called in Fragment
• Where should onActivityResult be handled, dialog fragment, fragment, or activity?

来源：https://stackoverflow.com/questions/24699207/android-dialog-fragments-and-onactivityresult