ListView

三部曲

1，新建适配器
2，给适配器添加数据
3，视图（ListView）加载适配器

• ArrayAdapter(集合或者数组)

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• SimpleAdapter（特定泛型的集合）

SimpleAdapter.png

private List<Map<String,Object>> datalists;
daralists = new ArrayList<Map<String,Object>>();
simple_adapter = new SimpleAdapter(MainActivity.this, initData(), R.layout.mylist, new String[] {"text"}, new int[] {R.id.myText});
listview.setAdapter(simple_adapter);

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• OnItemClickListener(点击事件)
  ListView.getItemAtPosition(position)
  @return The data associated with the specified position in the list

String s = listview.getItemAtPosition(position) + " click";
Toast.makeText(MainActivity.this, s, Toast.LENGTH_SHORT).show();

• OnScrollListener（滚动监听）
  scrollState:
  • SCROLL_STATE_FLING:手指离开屏幕之前，用户用力滑一下，listview根据惯性滑动
  • SCROLL_STATE_IDLE:视图已经停止滑动
  • SCROLL_STATE_TOUCH_SCROLL:手指没有离开屏幕，视图滑动

【notifyDatasetchanged动态更新视图中所包含的数据】

@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
switch (scrollState) {
case SCROLL_STATE_FLING:
Toast.makeText(MainActivity.this, "用力一滑", Toast.LENGTH_SHORT).show();
Map<String,Object> map = new HashMap<String, Object>();
//map.put("text", R.id.img);
map.put("text", "上拉刷新");
datalists.add(map);
simple_adapter.notifyDataSetChanged();
break;
case SCROLL_STATE_IDLE:
Toast.makeText(MainActivity.this, "停止滑动", Toast.LENGTH_SHORT).show();
break;
case SCROLL_STATE_TOUCH_SCROLL:
Toast.makeText(MainActivity.this, "正在滑动", Toast.LENGTH_SHORT).show();
break;
default:
break;
}
}

有一个要记得的是，要在onCreate里面记得设置监听器的响应。listview.setOnItemClickListener(this);
listview.setOnScrollListener(this);

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