How to lock a button in android and unlock it after a certain input?

Issue

For example I made a button where it would take me to another activity and I can input questions there, and I want to lock that button so it cannot be accessed. but after you have input a certain word or like a password that button will unlock. Does anyone know how to implement this? Help please Thank you.

Solution

You can enable and disable any view including buttons

Button btn = findViewById(R.id.button);
makeInteractable(btn,false); // disable button first

private void makeInteractable(View v, boolean interactable){
   view.setEnabled(interactable);
}

also you can add TextChangedListener to a EditText and update the button to make it intractable aftercertain data is entered

textfield.addTextChangedListener(new TextWatcher() {

   @Override
   public void afterTextChanged(Editable s) {}

   @Override    
   public void beforeTextChanged(CharSequence s, int start,
     int count, int after) {
   }

   @Override    
   public void onTextChanged(CharSequence s, int start,
     int before, int count) {
      if(conditionMeet())
        makeInteractable(btn, true);
   }
  });

Answered By - Sujan Poudel