小米手机server内部调用alertdialog不显示问题

首先自己创建一个方法

 

AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("您的账号被其他人登录").setMessage("需要对您强制下线，请确认您的账号安全")
                .setPositiveButton("修改密码", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Intent intent=new Intent(PollingService.this, ChangepasswordActivity.class);
                        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                        startActivity(intent);
                    }
                }).setNegativeButton("重新登录", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Intent intent=new Intent(PollingService.this, LoginActivity.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK