Null Validation on EditText box in Alert Dialog - Android
- by LordSnoutimus
Hi,
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 validation so that if what they have entered is blank or null, it does not do anything apart from creating a Toast saying error.
So far I have:
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Record New Track");
alert.setMessage("Please Name Your Track:");
// Set an EditText view to get user input
final EditText trackName = new EditText(this);
alert.setView(trackName);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
String textString = 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();
}
else
{
SQLiteDatabase db = waypoints.getWritableDatabase();
ContentValues trackvalues = new ContentValues();
trackvalues.put(TRACK_NAME, textString);
trackvalues.put(TRACK_START_TIME,tracktimeidentifier );
insertid=db.insertOrThrow(TRACK_TABLE_NAME, null, trackvalues);
}
But this just closes the Alert Dialog and then displays the Toast. I want the Alert Dialog to still be on the screen.
Thanks
