EditText ed = new EditText(context);
InputMethodManager mInputMethodManager = ((InputMethodManager) context
.getSystemService(context.INPUT_METHOD_SERVICE));
隐藏
mInputMethodManager.hideSoftInputFromWindow(ed.getWindowToken(),0);
展示
ed.setInputType(InputType.TYPE_DATETIME_VARIATION_NORMAL);
mInputMethodManager.showSoftInput(ed, 0);