2022/3/9

   switch (v.getId()){

            case R.id.btn_login:
                if(userid.equals("teacher")&&password.equals("11111"))
                {
                    SharedPreferences.Editor editor = preferences.edit();
                    editor.putString("userid",userid );
                    editor.commit();
                    intent = new Intent(this, TeahcerLoginSuccessActivity.class);
                    // 创建一个新包裹
                    Bundle bundle = new Bundle();
                    bundle.putString("login_sid", userid);
                    intent.putExtras(bundle);
                    startActivity(intent);
                }
                else{
                    if(info!=null){
                        if(info.getPassword().equals(password)){
                            SharedPreferences.Editor editor = preferences.edit();
                            editor.putString("userid",userid );
                            editor.commit();
                            intent = new Intent(this, LoginSuccessActivity.class);
                            // 创建一个新包裹
                            Bundle bundle = new Bundle();
                            bundle.putString("login_sid", userid);
                            intent.putExtras(bundle);
                            startActivity(intent);
                        }
                    }

                }

                break;
            case R.id.btn_register:
                intent = new Intent(this, RegisterActivity.class);
                startActivity(intent);
                break;
        }

　　安卓登录界面