java如何在其适配器函数中重新绘制可扩展列表？

Question

我有一个安卓应用程序，它有一个ExpandableList，在它的适配器中getChildView(int,int,boolean,View,ViewGroup)我想重新绘制ExpandableList如果某些条件为真，我应该怎么做

Answer 1

以下是答案，但不推荐：

这就是你的活力：

public class MyActivity extends Activity implements MyAdapterListener{
    private ExpandableListView expandableListView1;
    private MyAdapter adapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        expandableListView1 = (ExpandableListView) findViewById(R.id.expandableListView1);
        adapter = new MyAdapter(this);
        expandableListView1.setAdapter(adapter);
    }
    @Override
    public void doRefresh() {
        adapter.notifyDataSetChanged();
    }

}

这是您的适配器：

public class MyAdapter extends BaseExpandableListAdapter{

    public interface MyAdapterListener{
        public void doRefresh();
    }

    private MyAdapterListener listener;

    public MyAdapter(MyAdapterListener listener){
        this.listener = listener;
    }

    @Override
    public View getChildView(int groupPosition, int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {

        if(some condition is true and you want to refresh the list view){
            listener.doRefresh();
        }
        return null;
    }

}

希望这有帮助