OnItemClickListener与OnScrollListener监听器

1、OnItemClickListene监听器

可以处理视图中单个条目的点击事件

2、OnScrollListener监听器

监听滚动上完变化，可以用于试图在滚动中的加载

public class MainActivity extends Activity implements OnItemClickListener,
OnScrollListener {

private ListView listView;
private SimpleAdapter simple_adapter;
private List<Map<String, Object>> list;
private int i=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 匹配布局文件中的ListView控件
listView = (ListView) findViewById(R.id.listView);
<span style="white-space:pre">		</span>

<span style="white-space:pre">		</span>// 设置ListView的元素被选中时的事件处理监听器
listView.setOnItemClickListener(this);
getData();
// 设置SimpleAdapter监听器
simple_adapter = new SimpleAdapter(MainActivity.this,
list, R.layout.list_item,
new String[] { "image", "text" }, new int[] { R.id.image,
R.id.text });
listView.setAdapter(simple_adapter);
listView.setOnScrollListener(this);
}

<span style="white-space:pre">	</span>// 加载SimpleAdapter数据集
private List<Map<String, Object>> getData() {
list = new ArrayList<Map<String, Object>>();

Map<String, Object> map = new HashMap<String, Object>();
map.put("text", "java");
map.put("image", R.drawable.ic_launcher);

Map<String, Object> map2 = new HashMap<String, Object>();
map2.put("text", "C++");
map2.put("image", R.drawable.ic_launcher);

Map<String, Object> map3 = new HashMap<String, Object>();
map3.put("text", "JavaScript");
map3.put("image", R.drawable.ic_launcher);

Map<String, Object> map4 = new HashMap<String, Object>();
map4.put("text", "Php");
map4.put("image", R.drawable.ic_launcher);

Map<String, Object> map5 = new HashMap<String, Object>();
map5.put("text", "Python2");
map5.put("image", R.drawable.ic_launcher);

list.add(map);
list.add(map2);
list.add(map3);
list.add(map4);
list.add(map5);
Log.i("Main", list.size() + "");
return list;
}

<span style="white-space:pre">	</span>//事件处理监听器方法
<span style="white-space:pre">	</span>@Override
<span style="white-space:pre">	</span>public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// 获取点击ListView item中的内容信息
String text = listView.getItemAtPosition(position) + "";
// 弹出Toast信息显示点击位置和内容
Toast.makeText(MainActivity.this,
"position=" + position + " content=" + text, 0).show();
}

<span style="white-space:pre">		</span>//ListView滚动状态变化的监听器
<span style="white-space:pre">	</span>@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// 手指离开屏幕前，用力滑了一下
if (scrollState == SCROLL_STATE_FLING) {
Toast.makeText(MainActivity.this, "用力滑一下",0).show();
Map<String, Object> map = new HashMap<String, Object>();
map.put("text", "滚动添加 "+i++);
map.put("image", R.drawable.ic_launcher);
list.add(map);
listView.setAdapter(simple_adapter);
simple_adapter.notifyDataSetChanged();
} else
// 停止滚动
if (scrollState == SCROLL_STATE_IDLE) {
} else
// 正在滚动
if (scrollState == SCROLL_STATE_TOUCH_SCROLL) {

}
}

@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
}

}

  调用顺序：

正在滚动----->手指离开屏幕前，用力滑了一下------->停止滚动

如果选用加载增加项：

Map<String, Object> map = new HashMap<String, Object>();
map.put("text", "滚动添加 "+i++);
map.put("image", R.drawable.ic_launcher);
list.add(map);
listView.setAdapter(simple_adapter);
simple_adapter.notifyDataSetChanged();