Android set edittext max limit in bytes

Question

In android, I want an edit text with limit of 255 bytes, so when the user will try to exceed this limit, it won't let him to write.

All the filters I saw are using characters limit, even in the xml layout.

So how can I set a filter to the edittext in order to limit to 255 bytes?

Answer 1

One solution would be.

• Use a TextWatcher on the EditText to get a String of the typed text.
• Use myString.getBytes().length; to get the size of the string in bytes.

• perform an action on the EditText based on a threshold you have set in bytes.

  final int threshold = 255;
  EditText editText = new EditText(getActivity());
  editText.addTextChangedListener(new TextWatcher() {
      @Override
      public void beforeTextChanged(CharSequence s, int start, int count, int after) {
  
      }
  
      @Override
      public void onTextChanged(CharSequence s, int start, int before, int count) {
          int i = s.toString().getBytes().length;
          if(i < threshold){
              //Action needed
          }
      }
  
      @Override
      public void afterTextChanged(Editable s) {
  
      }
  });
  

You will need to apply this example to your own solution.