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);
//数据适配器的数据源
String[] data = new String[] { "java", "C++", "JavaScript", "Php",
"Python" };
//参数1：MainActivity:当前上下文
//参数2：当前ListView加载的每一个列表项所对应的布局文件
//参数3:数据源
// 数据适配器的定义，并加载数据源
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
MainActivity.this, android.R.layout.simple_list_item_1, data);
// 给ListView设置数据适配器
listView.setAdapter(adapter);
// 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
//new String[]{}:代表数据源中键值对的键名
new int []{}:代表键值对的id
// 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);
}
// 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);
return list;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
// (5)事件处理监听器方法
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// TODO Auto-generated method stub
// 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,Toast.LENGTH_SHORT).show();
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO Auto-generated method stub
// 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",Toast.LENGTH_SHORT).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);
//重新通知线程刷新UI界面
simple_adapter.notifyDataSetChanged();
} else
// 停止滚动
if (scrollState == SCROLL_STATE_IDLE) {
} else
// 正在滚动,手指没有离开屏幕
if (scrollState == SCROLL_STATE_TOUCH_SCROLL) {
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
// TODO Auto-generated method stub
}
}