android 安卓edittext自动弹出数字键盘

et.setFocusable(true);
et.setFocusableInTouchMode(true);
et.setInputType(EditorInfo.TYPE_CLASS_NUMBER);
Timer timer = new Timer();
timer.schedule(new TimerTask()
{
public void run()
{
InputMethodManager inputManager =(InputMethodManager)et.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
inputManager.showSoftInput(et, 0);
}
}, 500);