Null Validation on EditText box in Alert Dialog - Android

Question

I am trying to add some text validation to an edit text field located within an alert dialog box. It prompts a user to enter in a name.

I want to add some validatio

Answer 1

Use This code for displaying Dialog.

 public void onClick(DialogInterface dialog, int whichButton) {

            String textSt`enter code here`ring = trackName.getText().toString(); // Converts the value of getText to a string.
            if (textString != null && textString.trim().length() ==0)
            {       
                Context context = getApplicationContext();
                CharSequence error = "Please enter a track name" + textString;
                int duration = Toast.LENGTH_LONG;

                Toast toast = Toast.makeText(context, error, duration);
                toast.show();

                new AlertDialog.Builder(this)
                .setTitle("Message")
                .setMessage("please enter valid field")
                .setPositiveButton("OK", null).show();            
            }

This will create a Dialog for you, editText is empty or what are conditions you wants.