L'API indique que la boîte de dialogue d'alerte peut comporter un, deux ou trois boutons, mais le kit de développement logiciel ne permet qu'un bouton positif et un bouton négatif. Comment puis-je ajouter un troisième bouton?
Cet extrait de code devrait vous aider à expliquer les trois boutons que vous pouvez utiliser:
alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setTitle("Dialog Button");
alertDialog.setMessage("This is a three-button dialog!");
alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "Button 1 Text", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//...
} });
alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE, "Button 2 Text", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//...
}});
alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL, "Button 3 Text", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//...
}});
Lorsque vous créez la boîte de dialogue, ajoutez quelque chose comme ceci au générateur:
builder = new AlertDialog.Builder(context);
builder.setTitle("Test");
builder.setIcon(R.drawable.icon);
builder.setMessage("test");
builder.setPositiveButton("Call Now",
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int id)
{
dialog.cancel();
}
});
builder.setNeutralButton("Setup",
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int id)
{
context.startActivity(new Intent(context, Setup.class));
//dialog.cancel();
}
});
builder.setNegativeButton("Exit",
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int id)
{
dialog.cancel();
}
});
builder.create().show();
Ajouter tout type nombre de boutons sans XML:
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("Title");
builder.setItems(new CharSequence[]
{"button 1", "button 2", "button 3", "button 4"},
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// The 'which' argument contains the index position
// of the selected item
switch (which) {
case 0:
Toast.makeText(context, "clicked 1", 0).show();
break;
case 1:
Toast.makeText(context, "clicked 2", 0).show();
break;
case 2:
Toast.makeText(context, "clicked 3", 0).show();
break;
case 3:
Toast.makeText(context, "clicked 4", 0).show();
break;
}
}
});
builder.create().show();
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
this);
// set title
alertDialogBuilder.setTitle("To Do List");
// set dialog message
alertDialogBuilder
.setMessage("What do you want?")
.setCancelable(false)
.setPositiveButton("Delete All", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// if this button is clicked, close
// current activity
dialog.cancel();
}
}).setNeutralButton("Delete", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// if this button is clicked, close
// current activity
dialog.cancel();
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// if this button is clicked, just close
// the dialog box and do nothing
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();