https://stackoverflow.com/questions/23408756
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RussianFirst create an Base DialogFragment to keep hold of the instance of the Activity. So when the Dialog is attached to the Activity , you will know the instance of the Activity which created it.
public abstract class BaseDialogFragment<T> extends DialogFragment {
private T mActivityInstance;
public final T getActivityInstance() {
return mActivityInstance;
}
@Override
public void onAttach(Activity activity) {
mActivityInstance = (T) activity;
super.onAttach(activity);
}
@Override
public void onDetach() {
super.onDetach();
mActivityInstance = null;
}
}
Then, create a GeneralDialogFragment which extends the BaseDialogFragment
public class GeneralDialogFragment extends BaseDialogFragment<GeneralDialogFragment.OnDialogFragmentClickListener> {
// interface to handle the dialog click back to the Activity
public interface OnDialogFragmentClickListener {
public void onOkClicked(GeneralDialogFragment dialog);
public void onCancelClicked(GeneralDialogFragment dialog);
}
// Create an instance of the Dialog with the input
public static GeneralDialogFragment newInstance(String title, String message) {
GeneralDialogFragment frag = new GeneralDialogFragment();
Bundle args = new Bundle();
args.putString("title", title);
args.putString("msg", message);
frag.setArguments(args);
return frag;
}
// Create a Dialog using default AlertDialog builder , if not inflate custom view in onCreateView
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
return new AlertDialog.Builder(getActivity())
.setTitle(getArguments().getString("title"))
.setMessage(getArguments().getString("message"))
.setCancelable(false)
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
// Positive button clicked
getActivityInstance().onOkClicked(GeneralDialogFragment.this);
}
}
)
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
// negative button clicked
getActivityInstance().onCancelClicked(GeneralDialogFragment.this);
}
}
)
.create();
}
}
If you need to use your own custom layout for dialog,then inflate a layout in onCreateView and remove onCreateDialog . But Add the click listeners in onCreateView like i explained in onCreateDialog
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_dialog, container, false);
return view;
}
Then , In your Activity need to implement an interface to handle the action in dialog
public class TryMeActivity extends
FragmentActivity implements GeneralDialogFragment.OnDialogFragmentClickListener {
@Override
public void onOkClicked(GeneralDialogFragment dialog) {
// do your stuff
}
@Override
public void onCancelClicked(GeneralDialogFragment dialog) {
// do your stuff
}
}
Finally, Show the Dialog from your Activity when required, like this
GeneralDialogFragment generalDialogFragment =
GeneralDialogFragment.newInstance("title", "message");
generalDialogFragment.show(getSupportFragmentManager(),"dialog");
Hope this helps. I am sure this approach is one of the optimized way, but there could be also different approaches .
