快速解决进入fragment时不能弹出软件盘的问题

**
 * 狗屎弹键盘
 */
Handler handler = new Handler(new Handler.Callback() {
  @Override
  public boolean handleMessage(Message msg) {
    inputMethodManager.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
    return false;
  }
});

@Override
public void onResume() {
  super.onResume();
  handler.sendEmptyMessageDelayed(0, 500);
}