Android自动弹出键盘

 new Thread(new Runnable() {

            public void run() {
                InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.showSoftInput(it_leavingmsg_reply, InputMethodManager.RESULT_SHOWN);
                imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);
            }
        }).start();