I'm working on an app using Android Studio where I want to take input from the user and use it later on.
I want to only accept this input if its a letter. If the user inputs a number I want to show the user an error message instead of accepting the input.
This is the code I'm currently working on, at the moment it accepts whatever input the user enters:
EditText input;
input.setText("");
input = findViewById(R.id.input);
input.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
if (charSequence.length() != 0) {
useInputLaterOn(charSequence.charAt(0));
}
}
@Override
public void afterTextChanged(Editable editable) {
}
});
Use this code to check for a letter and show error if it's not a letter