How to avoid automatic closing in Dialogfragment?

Question

I developed a login screen, as can be seen in the figure below, following the section "Creating a Custom Layout" of official documentation.

The only problem I’m facing is that the dialog closes independent of the option I click. How to prevent automatic closing when I click the button ACCESS?

Dialog call:

public class MainActivity extends FragmentActivity {

    // ...

    public void abrirDialogLogin() {
        DialogFragment dialogLogin = new LoginDialog();
        dialogLogin.show(getSupportFragmentManager(), "login");
    }
}

Dialog building:

public class LoginDialog extends DialogFragment {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

        final LayoutInflater inflater = getActivity().getLayoutInflater();

        builder
            .setView(inflater.inflate(R.layout.login, null))
            .setPositiveButton(R.string.acessar, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    //TODO bloquear fechamento automático AQUI
                }
            })
            .setNegativeButton(R.string.cancelar, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    //TODO pode fechar automaticamente AQUI
                }
            });

        return builder.create();
    }
}

Answer 1

Put the following code in the method onCreateView() of your DialogFragment

getDialog().setCanceledOnTouchOutside(false);

Answer 2

To solve the reported problem I had to make small adjustments in the Logindialog class. The main change occurred in the method onCreateDialog() which now returns its value from super.onCreateDialog().

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    Dialog dialog = super.onCreateDialog(savedInstanceState);
    dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    return dialog;
}

Another important change was the implementation of the method onCreateView(). In this I make the Binding of my buttons and return a view containing my layout.

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.login, container, false);

    Button botaoCancelar = (Button) view.findViewById(R.id.botao_cancelar);
    Button botaoLogin = (Button) view.findViewById(R.id.botao_login);

    botaoCancelar.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //TODO realizando o cancelamento do dialog
        }
    });

    botaoLogin.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //TODO realizar o login
        }
    });

    return view;
}

So far everything works well. Only that the layout appears with reduced dimensions.

To get around the problem the following code should be written in the method onStart():

@Override
public void onStart() {
    super.onStart();
    Dialog dialog = getDialog();
    if (dialog != null) {
        dialog.getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    }        
}

Ready! Everything working perfectly.

Full code of the Logindialog class

public class LoginDialog extends DialogFragment {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        Dialog dialog = super.onCreateDialog(savedInstanceState);
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        return dialog;
    }

    @Override
    public void onStart() {
        super.onStart();
        Dialog dialog = getDialog();
        if (dialog != null) {
            dialog.getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        }        
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.login, container, false);

        Button botaoCancelar = (Button) view.findViewById(R.id.botao_cancelar);
        Button botaoLogin = (Button) view.findViewById(R.id.botao_login);

        botaoCancelar.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //TODO realizando o cancelamento do dialog
            }
        });

        botaoLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //TODO realizar o login
            }
        });

        return view;
    }
}

Login layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20sp"
        android:layout_marginTop="12dp"
        android:layout_marginBottom="12dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:text="@string/fazer_login"/>

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="textEmailAddress"
        android:hint="@string/email"
        android:layout_marginLeft="18dp"
        android:layout_marginRight="18dp"
        android:layout_marginBottom="12dp"
        android:id="@+id/email"/>

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="textPassword"
        android:hint="@string/senha"
        android:layout_marginLeft="18dp"
        android:layout_marginRight="18dp"
        android:layout_marginBottom="12dp"
        android:id="@+id/senha"/>

    <LinearLayout
        style="?android:attr/buttonBarStyle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:paddingTop="40dp"
        android:layout_marginLeft="18dp"
        android:layout_marginRight="18dp"
        android:gravity="right">

        <Button
            style="?android:attr/buttonBarButtonStyle"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:textColor="@color/colorPrimary"
            android:text="@string/cancelar"
            android:id="@+id/botao_cancelar"/>
        <Button
            style="?android:attr/buttonBarButtonStyle"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:textColor="@color/colorPrimary"
            android:text="@string/acessar"
            android:id="@+id/botao_login"/>
    </LinearLayout>

</LinearLayout>

In the layout you can notice the declared height and width with the maximum value (match_parent), however these values are disregarded and need to be overwritten during the life cycle of DialogFragment, as can be seen in the method onStart() class LoginDialog.