EditText输入监听

editText.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before,
                    int count) {
                // 文本改变时
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {
                // 文本改变之前
            }

            @Override
            public void afterTextChanged(final Editable s) {
                // 文本改变之后

        });

editText为要监听的EditText控件