Edittext监听动态改变
方法一：
???????? // 输入框限制输入字数
?? ???? editText.addTextChangedListener(new TextWatcher() {
?? ???? ??? private CharSequence temp;
?? ???? ??? private boolean isEdit = true;
?? ???? ??? private int selectionStart ;
?? ???????? private int selectionEnd ;
?? ???????? @Override
?? ???????? public void beforeTextChanged(CharSequence s, int arg1, int arg2,
?? ???????? ??? ??? int arg3) {
?? ???????? ??? temp = s;
?? ???????? }
?? ???????? @Override
?? ???????? public void onTextChanged(CharSequence s, int arg1, int arg2,
?? ???????? ??? ??? int arg3) {
?? ???????? }
?? ???? ??? @Override
?? ???? ??? public void afterTextChanged(Editable s) {
?? ???? ??? ???? selectionStart = editText.getSelectionStart();
?? ???????? ??? selectionEnd = editText.getSelectionEnd();
?? ???????? ??? Log.i("gongbiao1",""+selectionStart);
?? ???? ??? ??? if (temp.length() > Constant.TEXT_MAX) {
?? ???? ??? ??? ??? Toast.makeText(KaguHomeActivity.this,
?? ???????? ??? ??? ??? ??? R.string.edit_content_limit, Toast.LENGTH_SHORT)
?? ???????? ??? ??? ??? ??? .show();
?? ???? ??? ??? ??? s.delete(selectionStart-1, selectionEnd);
?? ???? ??? ??? ??? int tempSelection = selectionStart;
?? ???? ??? ??? ??? editText.setText(s);
?? ???? ??? ??? ??? editText.setSelection(tempSelection);
?? ???? ??? ??? }
?? ???? ??? }
?? ???? });
????? 方法二：
???????? 利用EditText可以设置filter的特性，自定义一个LengthFilter，当输入字数超过限制时 ，做出自定义的提示
????????? // 输入框限制输入字数
??? ??? InputFilter[] filters = new InputFilter[1];
??? ??? filters[0] = new InputFilter.LengthFilter(Constant.TEXT_MAX) {
??? ??? ??? @Override
??? ??? ??? public CharSequence filter(CharSequence source, int start, int end,
??? ??? ??? ??? ??? Spanned dest, int dstart, int dend) {
??? ??? ??? ??? if (source.length() > 0 && dest.length() == Constant.TEXT_MAX) {
??? ??? ??? ??? ??? if ((System.currentTimeMillis() - toastTime) > interval) {
??? ??? ??? ??? ??? ??? toastTime = System.currentTimeMillis();
??? ??? ??? ??? ??? ??? Toast
??? ??? ??? ??? ??? ??? ??? ??? .makeText(KaguHomeActivity.this,
??? ??? ??? ??? ??? ??? ??? ??? ??? ??? R.string.edit_content_limit,
??? ??? ??? ??? ??? ??? ??? ??? ??? ??? Toast.LENGTH_SHORT).show();
??? ??? ??? ??? ??? }
??? ??? ??? ??? }
??? ??? ??? ??? if (dest.toString().equals(
??? ??? ??? ??? ??? ??? getResources().getString(R.string.input_default_txt))) {
??? ??? ??? ??? ??? Bundle data = new Bundle();
??? ??? ??? ??? ??? data.putCharSequence("source", source);
??? ??? ??? ??? ??? Message message = textHandler.obtainMessage();
??? ??? ??? ??? ??? message.setData(data);
??? ??? ??? ??? ??? message.sendToTarget();
??? ??? ??? ??? }
??? ??? ??? ??? return super.filter(source, start, end, dest, dstart, dend);
??? ??? ??? }
??? ??? };
??? ??? editText.setFilters(filters);
private Handler textHandler = new Handler() {
??? ??? @Override
??? ??? public void handleMessage(Message msg) {
??? ??? ??? Bundle data = msg.getData();
??? ??? ??? CharSequence source = data.getCharSequence("source");
??? ??? ??? editText.setTextColor(Color.BLACK);
??? ??? ??? editText.setText(source);
??? ??? ??? editText.setSelection(source.length());
??? ??? }
??? };