Android EditText光标移动到文本框末尾

et_main.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) {        et_main.setSelection(et_main.getText().length());一定要在监听这才长期有用    }    @Override    public void afterTextChanged(Editable s) {    }});