1、代码
1 name_tv = (EditText) findViewById( R.id.name_tv );
2
3 name_tv.addTextChangedListener(new TextWatcher() {
4 @Override
5 public void beforeTextChanged(CharSequence s, int start, int count, int after) {
6 }
7
8 @Override
9 public void onTextChanged(CharSequence s, int start, int before, int count) {
10 }
11
12 @Override
13 public void afterTextChanged(Editable s) {
14 String string = s.toString().trim();
15
16 //限定输入框最多输入18个字节
17 int inputLength = string.length();
18 int byteLength = string.getBytes().length;
19 if (byteLength >= 18) {
20 name_tv.setFilters(new InputFilter[]{new InputFilter.LengthFilter(inputLength)});
21 } else {
22 name_tv.setFilters(new InputFilter[]{new InputFilter.LengthFilter(18)});
23 }
24 name_tv.setSelection(name_tv.getText().toString().length());
25 }
26 });