Android
DialogFragmentからActivityに選択した結果を返すサンプルコード
選択肢とかを表示するのに、DialogFragmentを使うときがあると思います。
で、ActivityからDialogFragmentを表示させて、Activityに戻った時、
onActivityResult(int requestCode, int resultCode, Intent data)
で取得できそうですよね。
しかし、取得できません。
「なんやて工藤！！」
と驚きますが、本当です。Fragment→DialogFragmentへの遷移なら、onActivityResultが使えます。
「せやかて工藤…！！」
残念ながら、Interfaceを作って自分で実装するしかありません。
下記の回答の3番目を参考にして、次のように作りました。
https://stackoverflow.com/questions/10905312/receive-result-from-dialogfragment
//Activityでinterfaceをimplementsする
public class SettingAlarmActivity extends UtilsFragmentActivity implements
OnClickListener, DaySelectDialogFragment.InterfaceCommunicator {
public static final int DAY_SELECT_REQUEST = 777;
//中略
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.day_of_week:
String type = "ON";
mAlarm.setType(type);
DaySelectDialogFragment day_select_dialog = new DaySelectDialogFragment();
day_select_dialog.show(m_fm_manager, TAG);
break;
}
@Override
public void sendRequestCode(int requestCode, Intent data) {
if (requestCode == DAY_SELECT_REQUEST) {
// Make sure the request was successful
mAlarm = data.getExtras().getParcelable("alarm");
String type = data.getExtras().getString("type");
if (type.equals("OFF")) {
mSelectedItemsOff = mAlarm.getListAutoOffDay();
alarmHelper.displayOffDays(context, mSelectedItemsOff, off_sunday,
off_monday, off_tuesday,
off_wednesday, off_thursday, off_friday, off_saturday,
no_days_select_off);
}
}
}
//DialogFragmentでインターフェースを作成
public class DaySelectDialogFragment extends DialogFragment {
private String type;
public InterfaceCommunicator interfaceCommunicator;
/**
* Activityに結果を返すために、作ったインターフェース
*/
public interface InterfaceCommunicator {
void sendRequestCode(int code, Intent intent);
}
/**
* Create a new instance of MyDialogFragment, providing "num"
* as an argument.
*/
static DaySelectDialogFragment newInstance(Alarm alarm) {
DaySelectDialogFragment f = new DaySelectDialogFragment();
return f;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
final SettingAlarmActivity settingAlarmActivity = (SettingAlarmActivity)getActivity();
type = fragmentAlarm.getType();
this.interfaceCommunicator = settingAlarmActivity;
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
// Set the dialog title
builder.setTitle(R.string.day_of_week)
.setMultiChoiceItems(R.array.dayOfWeeklist, selected_days,
new DialogInterface.OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialog, int which,
boolean isChecked) {
//中略
}
})
.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent();
intent.putExtra("alarm" , fragmentAlarm);
intent.putExtra("type" , type);
SettingAlarmHelper alarmHelper = new SettingAlarmHelper(getActivity());
alarmHelper.addAlarmAction(getActivity(), alarmHelper);
interfaceCommunicator.sendRequestCode(settingAlarmActivity.DAY_SELECT_REQUEST, intent);
dismiss();
}
})
.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
}
});
return builder.create();
}
}
