How to display Toast from AlertDialog?

Question

When the user clicks on the save button, an AlertDialog appears and asks the user to input text for the file name.

If the user clicks the positive button ("Ok") without specifying a name, I want to display a toast which asks them to do so, and keep the AlertDialog open. But the toast never displays and the dialog closes.

The code for the AlertDialog is here:

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

    alert.setTitle(R.string.save_game);
    alert.setMessage(R.string.request_name);

    // Set an EditText view to get user input 
    final EditText input = new EditText(this);
    input.setHint(R.string.untitled);
    alert.setView(input);

    alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int whichButton) {
      String value = input.getText().toString();
      if(value != null){
          // Do something with value      
      }
      else{
          Toast.makeText(context, R.string.no_name_given, Toast.LENGTH_SHORT).show();
      }
    }
    });

    alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int whichButton) {
        // Canceled.
    }
    });

    alert.show();

How can I make this happen?

Thanks!

Answer 1

Public void showToast() {
    Toast.makeText(this, R.string.no_name_given, Toast.LENGTH_SHORT).show();
} 

Just call this method instead of displaying toast from an alert dialog box like this in your code.

else {
    showToast();
}

To keep it open use this method

public void forceOpen() {

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

    alert.setTitle(R.string.save_game);
    alert.setMessage(R.string.request_name);

    // Set an EditText view to get user input 
    final EditText input = new EditText(this);
    input.setHint(R.string.untitled);
    alert.setView(input);

    alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
            String value = input.getText().toString();
            if(value != null) {
                // Do something with value      
            }
            else {
                Toast.makeText(context, R.string.no_name_given, Toast.LENGTH_SHORT).show();
            }
        }
    });

    alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
            // Canceled.
        }
    });

    alert.show();

}

Just reopen it.. Not sure why it closes but this will work

Answer 2

Change the code as follows:

if(value != null && value.length()>0){

// Do something with value      
 }else{
          Toast.makeText(context, R.string.no_name_given, Toast.LENGTH_SHORT).show();
}

Answer 3

You can disable the Ok button.If the condition is validate,then enable button again.