Android 跳转界面 自动弹出输入框

/*入口*/

handler.postDelayed(runnable, 500);

.....

private Handler handler = new Handler(Looper.getMainLooper());private Runnable runnable = new Runnable() {    @Override    public void run() {        /*获取焦点*/        editText.setFocusable(true);        editText.setFocusableInTouchMode(true);        editText.requestFocus();        collegeNum.setVisibility(View.GONE);        resultSchoolListView.setVisibility(View.GONE);        /*打开软键盘*/        imm.showSoftInput(editText, InputMethodManager.SHOW_FORCED);    }};