onScroll事件未针对listview触发

Question

我正在开发一个应用程序,我需要显示一些列表视图控件.我只是OnScrollListener在我的活动中实现,以便监视我的listview内容,但是当我为我的活动设置布局时,它不会调用onScroll事件.如果我评论该块然后它调用它就好了.我该如何解决这个问题？

package com.Threadtest;

import com.Threadtest.main.myRunnable;

import android.app.Activity;
import android.app.ListActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AbsListView.OnScrollListener;

public class TestList extends ListActivity implements OnScrollListener {

    Aleph0 adapter = new Aleph0();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test);
        ListView listview=(ListView)findViewById(android.R.id.list);
        listview.setAdapter(adapter);
        /*setListAdapter(adapter); 
        getListView().setOnScrollListener(this);*/
    }

    public void onScroll(AbsListView view,
        int firstVisible, final int visibleCount, int totalCount) {

        Log.i("TestList", "firstVisible="+firstVisible+" visibleCount="+visibleCount+" totalCount="+totalCount);
        boolean loadMore = /* maybe add a padding */
            firstVisible + visibleCount >= totalCount;

        if(loadMore) {
            Log.i("TestList", "In Notify");
            Thread thread = new Thread()
            {
                  @Override
                  public void run() {
                      try {
                        this.sleep(10000);
                        runOnUiThread(new myRunnable(adapter,visibleCount));
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }


                  }
              };

            thread.start();

        }
    }

    public void onScrollStateChanged(AbsListView v, int s) { } 

    class myRunnable implements Runnable
    {
        Aleph0 adapter;

        public myRunnable(Aleph0 adapter,int visibleCount)
        {

            this.adapter=adapter;
            this.adapter.count += visibleCount;
        }
        public void run() {
            // TODO Auto-generated method stub
             Log.i("TestList", "List Count="+adapter.count);
                adapter.notifyDataSetChanged();
        }

    }

    class Aleph0 extends BaseAdapter {
        int count = 40; /* starting amount */

        public int getCount() { return count; }
        public Object getItem(int pos) { return pos; }
        public long getItemId(int pos) { return pos; }

        public View getView(int pos, View v, ViewGroup p) {
            if(pos!=count-1)
            {
                TextView view = new TextView(TestList.this);
                view.setText("entry " + pos);
                return view;
            }
            TextView view = new TextView(TestList.this);
            view.setText("Loading.. " + pos);
            return view;

        }
    }
}

Answer 1

getListView().setOnScrollListener(this)有必要将监听器绑定到ListView.本ListActivity类不提供结合大多数听众的"自动"的方式,它只是提供了结合的自动方式OnItemClickListener.查看ListActivity代码.