How to programmatically set maxLength in Android TextView?

Question

Should be something like that. but never used it for textview, only edittext :

TextView tv = new TextView(this);
int maxLength = 10;
InputFilter[] fArray = new InputFilter[1];
fArray[0] = new InputFilter.LengthFilter(maxLength);
tv.setFilters(fArray);

Try this

int maxLengthofEditText = 4;    
editText.setFilters(new InputFilter[] {new InputFilter.LengthFilter(maxLengthofEditText)});

Easy way limit edit text character :

EditText ed=(EditText)findViewById(R.id.edittxt);
ed.setFilters(new InputFilter[]{new InputFilter.LengthFilter(15)});

For those of you using Kotlin

fun EditText.limitLength(maxLength: Int) {
    filters = arrayOf(InputFilter.LengthFilter(maxLength))
}

Then you can just use a simple editText.limitLength(10)

As João Carlos said, in Kotlin use:

editText.filters += InputFilter.LengthFilter(10)

See also https://stackoverflow.com/a/58372842/2914140 about some devices strange behaviour.

(Add android:inputType="textNoSuggestions" to your EditText.)

For Kotlin and without resetting previous filters:

fun TextView.addFilter(filter: InputFilter) {
  filters = if (filters.isNullOrEmpty()) {
    arrayOf(filter)
  } else {
    filters.toMutableList()
      .apply {
        removeAll { it.javaClass == filter.javaClass }
        add(filter)
      }
      .toTypedArray()
  }
}

textView.addFilter(InputFilter.LengthFilter(10))