方法一:利用TextWatcher 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InputFilter editText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(100)}); //其中100最大输入字数 方法三:在XML中设定 android:maxLength="100"