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Comment désactiver / activer les boutons positifs de dialogue?

Veuillez regarder la boîte de dialogue personnalisée ci-dessous. J'ai un champ edittext dans la boîte de dialogue et si le champ de texte est vide, j'aimerais désactiver le positiveButton. Je peux obtenir un charListener pour le champ de texte mais je ne sais pas comment je vais configurer le positivebutton pour le désactiver ou l'activer à partir de cet écouteur? Quelle est la référence pour les boutons positifs et négatifs?

 case DIALOG_TEXT_ENTRY:
    // This example shows how to add a custom layout to an AlertDialog
    LayoutInflater factory = LayoutInflater.from(this);
    final View textEntryView = factory.inflate(R.layout.alert_dialog_text_entry, null);
    return new AlertDialog.Builder(AlertDialogSamples.this)
        .setIconAttribute(Android.R.attr.alertDialogIcon)
        .setTitle(R.string.alert_dialog_text_entry)
        .setView(textEntryView)
        .setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
                /* User clicked OK so do some stuff */
            }
        })
        .setNegativeButton(R.string.alert_dialog_cancel, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
                /* User clicked cancel so do some stuff */
            }
        })
        .create();
}
androidbuttondialog
106
akd

Modifier pour solution complète ...

AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setIcon(Android.R.drawable.ic_dialog_info);
builder.setTitle("Alert dialog title");
builder.setMessage("This is the example code snippet to disable button if edittext attached to dialog is empty.");
builder.setPositiveButton("PositiveButton",
        new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface arg0, int arg1) {
                // DO TASK
            }
        });
builder.setNegativeButton("NegativeButton",
        new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface arg0, int arg1) {
                // DO TASK
            }
        });

// Set `EditText` to `dialog`. You can add `EditText` from `xml` too.
final EditText input = new EditText(MainActivity.this);

LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
        LinearLayout.LayoutParams.MATCH_PARENT,
        LinearLayout.LayoutParams.MATCH_PARENT
);
input.setLayoutParams(lp);


builder.setView(input);

final AlertDialog dialog = builder.create();
dialog.show();

// Initially disable the button
((AlertDialog) dialog).getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);

// OR you can use here setOnShowListener to disable button at first time.

// Now set the textchange listener for edittext
input.addTextChangedListener(new TextWatcher() {

    @Override
    public void onTextChanged(CharSequence s, int start, int before,
            int count) {
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count,
            int after) {
    }

    @Override
    public void afterTextChanged(Editable s) {

        // Check if edittext is empty
        if (TextUtils.isEmpty(s)) {
            // Disable ok button
            ((AlertDialog) dialog).getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);

        } else {
            // Something into edit text. Enable the button.
            ((AlertDialog) dialog).getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(true);
        }

    }
});

Vous trouverez ci-dessous l'historique édité, que vous pouvez consulter comme plus de détails.

Voici un exemple de code, essayez ceci

AlertDialog.Builder builder = new AlertDialog.Builder(AddSchedule.this);
builder.setIcon(Android.R.drawable.ic_dialog_info);
builder.setTitle("Alert dialog title");
builder.setMessage("Dialog message");
builder.setPositiveButton("Button1", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface arg0, int arg1) {
        //DO TASK
    }
});
builder.setNegativeButton("Button2", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface arg0, int arg1) {
        //DO TASK
    }
});

AlertDialog dialog = builder.create();
dialog.show();

// After calling show method, you need to check your condition and enable/disable the dialog buttons 
if (your_condition_true) {
    // BUTTON1 is the positive button
    dialog.getButton(AlertDialog.BUTTON1).setEnabled(false);
}

Pour le bouton négatif

dialog.getButton(AlertDialog.BUTTON2).setEnabled(false); //BUTTON2 is negative button

Pour les boutons id : Référencealert_dialog.xml

édité:

Et le setOnShowListener depuis l'API de niveau 8 (FroYo), fait de même,

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setPositiveButton(Android.R.string.ok, null);

AlertDialog dialog = builder.create();
dialog.setOnShowListener(new OnShowListener() {

    @Override
    public void onShow(DialogInterface dialog) {
        if (condition) {
            ((AlertDialog)dialog).getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);
        }
    }
});

dialog.show();

Edité 

new AlertDialog.Builder(this)
    .setMessage("This may take a while")
    .setPositiveButton("OK", new Android.content.DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {
            ((AlertDialog)dialog).getButton(which).setVisibility(View.INVISIBLE);
            // the rest of your stuff
        }

    }).show();
196
Pankaj Kumar

Aucune de ces réponses ne résout vraiment le problème.

Pour ce faire, j'utilise une mise en page personnalisée avec un EditText et un TextWatcher sur cette vue.

final LinearLayout layout = (LinearLayout) inflator.inflate(R.layout.text_dialog, null);
final EditText text = (EditText) layout.findViewById(R.id.text_edit);
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setView(layout);
// Now add the buttons...
builder.setPositiveButton(R.string.ok, new AlertDialog.OnClickListener() {
    // Left out for brevity...
}
builder.setNegativeButton(R.string.cancel, new AlertDialog.OnClickListener() {
    // Left out for brevity...
}

// Create the dialog
final AlertDialog d = builder.create();

// Now add a TextWatcher that will handle enable/disable of save button
text.addTextChangedListener(new TextWatcher() {
    private void handleText() {
        // Grab the button
        final Button okButton = d.getButton(AlertDialog.BUTTON_POSITIVE);
        if(text.getText().length() == 0) {
            okButton.setEnabled(false);
        } else {
            okButton.setEnabled(true);
        }
    }
    @Override
    public void afterTextChanged(Editable arg0) {
        handleText();
    }
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        // Nothing to do
    }
    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
       // Nothing to do
    }
});

// show the dialog
d.show();
// and disable the button to start with
d.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);
24
Nick Palmer

Voici le code complet pour activer et désactiver le bouton de dialogue positif

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

    LayoutInflater layoutInflater = MainActivity.this.getLayoutInflater();

    View view = layoutInflater.inflate(R.layout.dialog,null);

    builder.setView(view);

    builder.setTitle("Test");
    builder.setPositiveButton("ok", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {

            Toast.makeText(MainActivity.this, "Ok clicked", Toast.LENGTH_SHORT).show();
            dialog.dismiss();

        }
    });
    builder.setNegativeButton("cancel", null);


    final AlertDialog alertDialog = builder.create();

    alertDialog.show();

    EditText editText = (EditText)view.findViewById(R.id.mobile_number);
    alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);
    editText.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {

            if(s.length()>=1)
            {
                alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(true);
            }
            else {
                alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);

            }

        }
    });
4
Kalpesh Kumawat

Pour supprimer un enregistrement de la vue de liste de la base de données en utilisant le détenteur de la vue, vous avez utilisé ce code dans votre méthode getview ().

viewHolder.btn.setOnClickListener (nouveau OnClickListener () {

                @Override
                public void onClick(View arg0) {
                    // TODO Auto-generated method stub
                    AlertDialog.Builder alertDialog2 = new AlertDialog.Builder(
                            Favorate.this.getParent());

                    // Setting Dialog Title
                    alertDialog2.setTitle("Confirm Delete...");

                    // Setting Dialog Message
                    alertDialog2
                            .setMessage("Are you sure you want delete ?");

                    // Setting Icon to Dialog
                    alertDialog2.setIcon(R.drawable.delete);

                    // Setting Positive "Yes" Btn
                    alertDialog2.setPositiveButton("YES",
                            new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog,
                                        int which) {
                                    // Write your code here to execute after
                                    // dialog

                                    int id = _items.get(position).id;
                                    db.deleterecord(id);

                                    db.close();
                                }
                            });
                    // Setting Negative "NO" Btn
                    alertDialog2.setNegativeButton("NO",
                            new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog,
                                        int which) {
                                    // Write your code here to execute after
                                    // dialog

                                    dialog.cancel();
                                }
                            });

                    // Showing Alert Dialog
                    alertDialog2.show();

                }
            });

en savoir plus

0
Roadies

Ce dialogFragment fera le travail pour vous. Notez que la boîte de dialogue restera ouverte après la rotation de l'écran en préservant le texte déjà saisi par l'utilisateur. Si vous ne souhaitez pas que cela se produise, vous devez ignorer le fragment dans onStop de votre activité. La signature de la méthode newInstance peut être modifiée selon vos besoins.

import Android.app.Activity;
import Android.app.Dialog;
import Android.app.DialogFragment;
import Android.content.DialogInterface;
import Android.os.Bundle;
import Android.support.annotation.Nullable;
import Android.support.v7.app.AlertDialog;
import Android.text.Editable;
import Android.text.TextWatcher;
import Android.widget.EditText;

public class TextViewDialogFragment extends DialogFragment implements DialogInterface.OnClickListener, DialogInterface.OnShowListener, TextWatcher
{
    final static private String TITLE = "title", MESSAGE = "message", IDENTIFIER = "identifier", INPUT_TYPE = "inputType", POSITIVE_TEXT = "pText", NEGATIVE_TEXT = "nText", CANCELABLE = "cancelable";

    public TextViewDialogFragment()
    {
        super();
    }

    static public TextViewDialogFragment newInstance(int title, @Nullable String message, int identifier, int inputType, int positiveText, int negativeText, boolean cancelable)
    {
        TextViewDialogFragment fragement = new TextViewDialogFragment();
        Bundle args = new Bundle();
        args.putInt(TITLE, title);
        args.putString(MESSAGE, message);
        args.putInt(IDENTIFIER, identifier);
        args.putInt(INPUT_TYPE, inputType);
        args.putInt(POSITIVE_TEXT, positiveText);
        args.putInt(NEGATIVE_TEXT, negativeText);
        args.putBoolean(CANCELABLE, cancelable);
        fragement.setArguments(args);
        return fragement;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState)
    {
        Activity activity =  getActivity();
        Bundle args = getArguments();
        EditText input = new EditText(activity);
        input.setInputType(args.getInt(INPUT_TYPE));
        input.setId(R.id.dialog_edit_text);
        input.addTextChangedListener(this);
        AlertDialog.Builder alert = new AlertDialog.Builder(activity);
        alert.setCancelable(args.getBoolean(CANCELABLE)).setTitle(args.getInt(TITLE)).setMessage(args.getString(MESSAGE)).setView(input).setPositiveButton(args.getInt(POSITIVE_TEXT), this);
        int negativeText = args.getInt(NEGATIVE_TEXT);
        if (negativeText != 0)
        {
            alert.setNegativeButton(negativeText, this);
        }
        AlertDialog dialog = alert.create();
        dialog.setOnShowListener(this);
        return dialog;
    }

    @Override
    public void onShow(DialogInterface dialog)
    {
        // After device rotation there may be some text present.
        if (((EditText)((AlertDialog) dialog).findViewById(R.id.dialog_edit_text)).length() == 0)
        {
            ((AlertDialog) dialog).getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);
        }
    }

    @Override
    public void onClick(DialogInterface dialog, int which)
    {
        String text = ((EditText)((AlertDialog) dialog).findViewById(R.id.dialog_edit_text)).getText().toString();
        ((Callbacks) getActivity()).onTextViewDialogResult(which, getArguments().getInt(IDENTIFIER), text);
    }

    @Override
    public void onCancel(DialogInterface dialog)
    {
        ((Callbacks) getActivity()).onTextViewDialogActivityCancelled(getArguments().getInt(IDENTIFIER));
        super.onCancel(dialog);
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after)
    {
    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count)
    {
    }

    @Override
    public void afterTextChanged(Editable s)
    {
        ((AlertDialog) getDialog()).getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(s.length() > 0);
    }

    void setMessage(String message)
    {
        Bundle args = getArguments();
        args.putString(MESSAGE, message);
        setArguments(args);
    }

    interface Callbacks
    {
        void onTextViewDialogResult(int which, int identity, String text);
        void onTextViewDialogActivityCancelled(int identity);
    }
}

Ajoutez des outils à votre activité (tout type d’activité est acceptable):

public class Myctivity extends AppCompatActivity implements TextViewDialogFragment.Callbacks
{
...
}

Créez le diaglogFragment dans votre activité comme ceci:

final static int SOMETHING = 1;
myDF = TextViewDialogFragment.newInstance(R.string.my_title, "my message", SOMETHING, InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_CAP_WORDS | InputType.TYPE_TEXT_FLAG_CAP_SENTENCES, /* Whatever is best for your user. */    R.string.yay, Android.R.string.cancel, true);

Traitez le résultat dans votre activité comme ceci:

@Override
public void onTextViewDialogResult(int which, int identity, String text)
{
    if (which == AlertDialog.BUTTON_NEGATIVE)
    {
        // User did not want to do anything.
        return;
    }
    // text now holds the users answer.
    // Identity can be used if you use the same fragment for more than one type of question.
}
@Override
public void onTextViewDialogActivityCancelled(int identity)
{
    // This is invoked if you set cancelable to true and the user pressed the back button.
}

Vous devez créer l'identifiant de la ressource afin d'ajouter cette ressource sous quelque part sous res/values

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <item name="dialog_edit_text" type="id"/>
</resources>
0
Steve Waring