CustomDialogOnAttach Fragment 예제

CustomDialog Fragment 예제의 연장선이다.

그 전 예제는 그저 dialog만 띄우고 끝이 났다.

이제는 dialog를 띄우고 '확인', '취소' 중에 어떤 것을 선택했는지 확인하는 예제이다.

(https://developer.android.com/guide/topics/ui/dialogs.html?hl=ko#PassingEvents 중 "이벤트를 대화상자의 호스트에 다시 전달" 참조)

DialogOnAttachFragment.zip

ServerTestDialogFragment.java

public class ServerTestDialogFragment extends DialogFragment { public interface DialogListener{ public void onDialogPositiveClick(DialogFragment dialog); public void onDialogNegativeClick(DialogFragment dialog); } DialogListener mListener; @Override public void onAttach(Context context) { super.onAttach(context); // Verify that the host activity implements the callback interface try { // Instantiate the NoticeDialogListener so we can send events to the host mListener = (DialogListener) getActivity(); } catch (ClassCastException e) { // The activity doesn't implement the interface, throw exception throw new ClassCastException(getActivity().toString() + " must implement NoticeDialogListener"); } } @NonNull @Override public Dialog onCreateDialog(Bundle savedInstanceState) { AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); // Get the layout inflater LayoutInflater inflater = getActivity().getLayoutInflater(); //Inflate and set the layout for the dialog // Pass null as the parent view because its going in the dialog layout // null은 사실 테마와 관련이 있다!!(https://stackoverflow.com/questions/2422562/how-to-change-theme-for-alertdialog) builder.setView(inflater.inflate(R.layout.dialogfragment_main, null)) // Add action buttons .setPositiveButton(R.string.signin, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { // sign in the user mListener.onDialogPositiveClick(ServerTestDialogFragment.this); } }) .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { mListener.onDialogNegativeClick(ServerTestDialogFragment.this); //ServerTestDialogFragment.this.getDialog().cancel(); } }); return builder.create(); } }

> interface를 정의하고 클릭했을 때 호출 하도록 한다.

MainActivity.java

public class MainActivity extends AppCompatActivity implements ServerTestDialogFragment.DialogListener{ static final String TAG = "DIALOG_ONATTACH"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button btn = (Button) findViewById(R.id.button); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { FragmentManager fm = getSupportFragmentManager(); FragmentTransaction tr = fm.beginTransaction(); Fragment prev = fm.findFragmentByTag(TAG); if(prev != null){ tr.remove(prev); } ServerTestDialogFragment dialog = new ServerTestDialogFragment(); dialog.show(fm, TAG); } }); } @Override public void onDialogPositiveClick(DialogFragment dialog) { if(dialog != null && dialog.getShowsDialog()){ dialog.dismiss(); Toast.makeText(this, "확인", Toast.LENGTH_SHORT).show(); } } @Override public void onDialogNegativeClick(DialogFragment dialog) { if(dialog != null && dialog.getShowsDialog()){ dialog.dismiss(); Toast.makeText(this, "취소", Toast.LENGTH_SHORT).show(); } } }

> interface를 구현해주면 끝난다. 이전 예제에 비해서 버튼을 클릭하면 팝업이 뜨도록 변경하였다.

출처 : https://developer.android.com/guide/topics/ui/dialogs.html?hl=ko#PassingEvents