CODEWITHSUNDEEP
androidandroid-edittext
Elior
Elior

Reputation: 3266

Android set edittext max limit in bytes

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?

Upvotes: 5

Views: 2270

Answers (2)

J Whitfield
J Whitfield

Reputation: 755

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.

Upvotes: 4

Pankaj Nimgade
Pankaj Nimgade

Reputation: 4549

One Charterer (char) is of 2 bytes, if you set the android:maxlength="128" in your editText, you will get the limit you want 

                            <EditText

                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:ems="10"
                                android:inputType="textPersonName"
                                android:lines="1"
                                android:maxLength="128"
                                android:singleLine="true"
                                android:visibility="visible" />

Upvotes: -1

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