framelayout中如何通过view实现arraylist

在一个framelayout中，通过LayoutInflater.from(context).inflate（）方法得到的一个view，里面的listview为什么没有显示？
代码如下

 public class AlarmLayout extends FrameLayout {
   Context context;

    public AlarmLayout(Context context) {
        super(context);
        this.context = context;
        init();
    }


    public AlarmLayout(Context context, AttributeSet attrs) {...}


    public AlarmLayout(Context context, AttributeSet attrs, int defStyleAttr) {...}


    private void init() {
        View view = LayoutInflater.from(context).inflate(R.layout.activity_alarm, null);
        TextView tv = (TextView) view.findViewById(R.id.alarm_id);
        tv.setText("ssss");
        ListView alarmList = (ListView) view.findViewById(R.id.alarm_list2);
        ArrayAdapter<AlarmData> arrayAdapter;
        arrayAdapter = new ArrayAdapter<AlarmData>(view.getContext(), android.R.layout.simple_list_item_1);
        arrayAdapter.add(new AlarmData(Calendar.getInstance()));
        alarmList.setAdapter(arrayAdapter);
        ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(-1, -1);
        this.addView(view, lp);

    }


}


AlarmData是自定义的一个类，已经复写toString方法，textView可以正常显示。