Develop Reference

Closing with Outsideclick on DialogFragment not working Android

I have a cutstom DialogFragment to show a message to the user:
public class MensajeDialogFragment extends DialogFragment {
TextView mTvMensaje;
TextView mTvTitulo;
Button mBtnAceptar;
Button mBtnCancelar;
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
View dialogView = inflater.inflate(R.layout.layout_mensaje_dialog, null);
mTvTitulo = (TextView) dialogView.findViewById(R.id.tvTitulo);
mTvMensaje = (TextView) dialogView.findViewById(R.id.tvMensaje);
mBtnAceptar = (Button) dialogView.findViewById(R.id.btnAceptar);
mBtnCancelar = (Button) dialogView.findViewById(R.id.btnCancelar);
mTvTitulo.setText(getArguments().getString(getString(R.string.bundle_titulo), ""));
mTvMensaje.setText(getArguments().getString(getString(R.string.bundle_mensaje), ""));
mBtnAceptar.setText(getArguments().getString(getString(R.string.bundle_aceptar), ""));
mBtnCancelar.setText(getArguments().getString(getString(R.string.bundle_cancelar), ""));
builder.setView(dialogView);
getDialog().setCanceledOnTouchOutside(true);
return builder.create();
}
}
But when I reach the getDialog().setCanceledOnTouchOutside(true), I am getting NullPointerException beacuse the getDialog() is returning null.
What am I doing wrong? I want to close the dialog when the user clicks outside of it.

Since you are using DialogFragment, dialog won't be initialized on onCreate of DialogFragment.
I believe DialogFragment by default closes when user clicks outside it.You don't have to declare it explicitly. If you still want to call this function, then DialogFragment has a function called
DialogFragment.setCancelable(boolean)
EDIT
If the above code doesn't work, you can try calling
getDialog().setCanceledOnTouchOutside(true);
inside onCreateView as Dialog object will on be initialized on getLayoutInflater during onCreateDialog. So by the time it reaches onCreateView dialog object will be initialized.

Set text in TextView in custom dialog

I want to set the text in a TextView contained in a custom dialog programmatically, so that I can use Html.fromHtml. In what function should I call setText? I've tried doing it in onCreateDialog, but this does not actually change the text.
public class InfoDialogFragment extends DialogFragment {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the Builder class for convenient dialog construction
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
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
builder.setView(inflater.inflate(R.layout.infodialog, null));
TextView textView = (TextView) getActivity().findViewById(R.id.info);
textView.setText(Html.fromHtml("<h1>Text has been correctly set</h1>"));
...

Try this:
View content = inflater.inflate(R.layout.infodialog, null);
builder.setView(content);
TextView textView = (TextView) content.findViewById(R.id.info);

how to add custom views to alertdialog in android?

I am trying to add custom views(chekbox and two radio buttons) as shown in image below in alertdialog but not succeded.
Please suggest me a way to get views as shown in the image.
Thanks in advance!!

Use DialogFragment instead of AlertDialog.
public class CustomDialogFragment extends DialogFragment {
#NonNull
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = LayoutInflater.from(getActivity());
View viewRoot = inflater.inflate(R.layout.dialog_view, null);
//do something with your view
builder.setView(viewRoot);
return builder.create();
}
}
R.layout.dialog_view - it's your view, which you want to display

You can build dialog with custom layout. Here's some tutorial how to do that:
http://www.mkyong.com/android/android-custom-dialog-example/

How center custom dialog title on Android

I'm writing a custom dialog on android.
I did this using the onCreateView method.
public class CheckpointLongPressDialog extends DialogFragment {
public void CheckpointLongPressDialog() {}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_checkpoint_long_press_dialog, container);
getDialog().setTitle("TITLE");
return view;
}
How can i center the title programmatically?

Maybe its not the best way, I use a custom title TextView.
TextView title = new TextView(mainActivity);
title.setText(alertTitle);
title.setBackgroundResource(R.drawable.gradient);
title.setPadding(10, 10, 10, 10);
title.setGravity(Gravity.CENTER); // this is required to bring it to center.
title.setTextSize(22);
getDialog().setCustomTitle(title);

I solve the problem using a builder and inflating the xml layout.
private AlertDialog.Builder builder;
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the Builder class for convenient dialog construction
builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
builder.setView(inflater.inflate(R.layout.fragment_checkpoint_long_press_dialog, null));
// Create the AlertDialog object and return it
return builder.create();
}

Try this..
final int titleId = getActivity().getResources().getIdentifier("alertTitle", "id", "android");
TextView title = (TextView) getDialog().findViewById(titleId);
if (title != null) {
title.setGravity(Gravity.CENTER);
}

What if you use the whole layout to inflate also your custom title?. Instead of getDialog().setTitle("TITLE"); you can also include a TextView in your custom layout for the title.

The title view is using default theme. You have 2 ways to do what you want, first one is better for having a more customized experience:
Use this to have a dialog without title, and then make custom title bar in the layout of this fragment.
dialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
Extend the default theme for the dialog and update it, then set it in this dialog.

Assign Dialog box view to another view

I am creating a dialog and setting setContentView of a layout. And I am programmatically adding buttons, images to layout in dialog setContentView . Now how I can assign dialog box view to another view.
That is a layout is assigned to a a view like below
View getview=R.layout.tamil_alphabet_speak_word;
Similarly how can I assign the dialog box view to another view. Since I am adding all elements to the view "TamilAlphabets" programmatically the child are null it returns for the below code.
Alphbetdialog=new Dialog(TamilAlphabets.this);
Alphbetdialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
Alphbetdialog.setContentView(R.layout.tamil_alphabetsdialog);
(adding elements to the layout "TamilAlphabets" code
..............
)
LayoutInflater inflator=(LayoutInflater)TamilAlphabets.this.getSystemService
(TamilAlphabets.this.LAYOUT_INFLATER_SERVICE);
View row=inflator.inflate(tamil_alphabetsdialog, Parent,false);
LinearLayout l1=(LinearLayout)row.findViewById(R.id.alphabetlayout1);
ViewGroup vg=(ViewGroup)l1;
vg.getChildCount();
So I need to assign the dialog box view to another view how do I do that.
I need something like this
View getview=<I need dialog box view>

You should avoid using Dialog class directly and instead use Dialog subclass's or DialogFragment
https://developer.android.com/guide/topics/ui/dialogs.html:
The Dialog class is the base class for dialogs, but you should avoid instantiating Dialog directly. Instead, use one of the following subclasses:
AlertDialog
A dialog that can show a title, up to three buttons, a list of selectable items, or a custom layout.
DatePickerDialog or TimePickerDialog
A dialog with a pre-defined UI that allows the user to select a date or time.
In any case im guessing that what you want is a custom dialog and what is recomendaded is using the DialogFragment class in that case here is an example
Dialog fragment layout
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/textView1"
android:layout_width="match_parent"
android:layout_height="match_parent">
Dialog class
public class DialogExampleFragment extends DialogFragment {
private static final String ARG_PARAM = "extra:PARAM";
private String mText;
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle arguments = getArguments();
mText = arguments.getString(ARG_PARAM);
}
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
Dialog dialog = super.onCreateDialog(savedInstanceState);
dialog.setTitle("title");
return dialog;
}
public static DialogExampleFragment newInstance(String message) {
Bundle args = new Bundle();
args.putSerializable(ARG_PARAM, message);
DialogExampleFragment fragment = new DialogExampleFragment();
fragment.setArguments(args);
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.fragment_dialog_example, container, false);
TextView t = (TextView) root.findViewById(R.id.textView1);
t.setText(mText);
return root;
}
}
To show as a dialog
DialogExampleFragment.newInstance("Message")
.show(getFragmentManager(), "dialog");
Note since a DialogFragment is a fragment it has de advantage of being able to be shown as a Dialog or as a regular fragment you can get all the information on the link i posted above