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