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How do you set the max number of characters for an EditText in Android?

In XML you can add this line to the EditText View where 140 is the maximum number of characters:

android:maxLength="140"

Dynamically:

editText.setFilters(new InputFilter[] { new InputFilter.LengthFilter(MAX_NUM) });

Via xml:

<EditText
    android:maxLength="@integer/max_edittext_length"

You can use a InputFilter, that's the way:

EditText myEditText = (EditText) findViewById(R.id.editText1);
InputFilter[] filters = new InputFilter[1];
filters[0] = new InputFilter.LengthFilter(10); //Filter to 10 characters
myEditText .setFilters(filters);

I always set the max like this:

    <EditText
        android:id="@+id/edit_blaze_it
        android:layout_width="0dp"
        android:layout_height="@dimen/too_high"

    <!-- This is the line you need to write to set the max-->
        android:maxLength="420"
        />

It is working for me.

    etMsgDescription.setFilters(new InputFilter[] {new InputFilter.LengthFilter(maximum_character)});

    etMsgDescription.addTextChangedListener(new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

            tvCharacterLimite.setText(" "+String.valueOf(maximum_character - etMsgDescription.getText().length()));
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {
            // TODO Auto-generated method stub

        }

        @Override
        public void afterTextChanged(Editable s) {
            // TODO Auto-generated method stub

        }
    });