Android实现有字数限制的EditText

Android中的控制EditText输入的最大字数

image.png

etContent为EditText的输入框

tvCount为对应计数显示的TextView

    int maxTextCount = 100;
etContent.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) {
        etContent.removeTextChangedListener(this);//**** 注意的地方
        if (s.length() > maxTextCount) {
            etContent.setText(s.toString().substring(0, maxTextCount));
            etContent.setSelection(maxTextCount);
            tvCount.setText(maxTextCount + "");
        } else {
            tvCount.setText(s.length() + "/" + maxTextCount + "字");
        }
        etContent.addTextChangedListener(this);//****  注意的地方
    }
    @Override
    public void afterTextChanged(Editable s) {
    }
});