sending data to an intent depending on a view (a radio button)

问题

i have an activity showing a dialog which contains radioButtons, and to buttons (Ok,cancel)

1. can i launch an activity from this dialog ?
2. how to send the id of the radioButton selected to the second activity ?

回答1:

in the onClick() method of the OK Button, you can add this code to start another Activity and pass the id of the checked radio button :

Intent intent = new Intent(FirstActivity.this, SecondActitvity.class);
intent.putextras("extra_selected_radio_button", checkedRadioButton.getId());
startActivity(intent);

and in the onCreate() method of the SecondActivity , you can retrieve the id of the selected radio button like this :

Intent intent = getIntent();
int radioButtonId = intent.getIntExtra("extra_selected_radio_button", -1); // -1 is the default value

PS : Check this tutorial to learn more about sending data between activities in Android.

回答2:

Yes you can:

1. On the OK button listener just do startActivity(intent)
2. Before the previous method call you have to put an extra in the intent, like so intent.putExtra("radioButtonId", radioButtonValue)

回答3:

To start an activity from your dialog you'll have to add this into your button's onClick() code:

Intent intentLoad = new Intent(getBaseContext(), YourNewActivity.class);
startActivityForResult();

If you want to send data to your activity, use: putExtra

Like this:

Intent intentLoad = new Intent(getBaseContext(), YourNewActivity.class);
intent.putExtra("radioID", id-of-your-radioButton);
startActivityForResult();

You can catch your id in the activity with:

int myRadioId = extras.getInt("radioID");

来源：https://stackoverflow.com/questions/22874408/sending-data-to-an-intent-depending-on-a-view-a-radio-button