ListView列表显示数据

最新推荐文章于 2021-11-30 13:39:25 发布

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本文介绍了Android中使用ListView展示数据的两种方式：List<HashMap<String,Object>>方式和Cursor方式，并详细解释了如何配置适配器及通过点击事件获取数据。

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ListView显示列表数据分为List<HashMap<String,Object>>方式和Cursor方式。两种方式用的适配器不一样，点击item取会的数据类型也不一样。

1、List<HashMap<String,Object>>方式：

List<News> videos = VideoNewsService.getLastNews();
			List<HashMap<String, Object>> data = new ArrayList<HashMap<String,Object>>();
			for(News news : videos){
				HashMap<String, Object> item = new HashMap<String, Object>();
				item.put("id", news.getId());
				item.put("title", news.getTitle());
				item.put("timelength", getResources().getString(R.string.timelength)
						+ news.getTimelength()+ getResources().getString(R.string.min));
				data.add(item);
			}
			SimpleAdapter adapter = new SimpleAdapter(this, data, R.layout.item,
					new String[]{"title", "timelength"}, new int[]{R.id.title, R.id.timelength});
			listView.setAdapter(adapter);
			listView.setOnItemClickListener(new ItemClickListener() );

点击Item:

class ItemClickListener implements OnItemClickListener {
		@Override
		public void onItemClick(AdapterView<?> parent, View view, int position,
				long id) {
		ListView listView = (ListView) parent;
			HashMap<String, Object> data = (HashMap<String, Object>) listView.getItemAtPosition(position);
			String personid = data.get("id").toString();
			Toast.makeText(getApplicationContext(), personid, 1).show();
		}

2.Cursor方式：

PersonService service=new PersonService(getApplicationContext());
		Cursor cursor=service.getScorollData(0, 10);
	
		ListView listView = (ListView) this.findViewById(R.id.listView);
		SimpleCursorAdapter adapter=new SimpleCursorAdapter(getApplicationContext(), R.layout.item, cursor, new String[] 		{ "name", "age" }, new int[] {
						R.id.title, R.id.len });
		listView.setAdapter(adapter);
		listView.setOnItemClickListener(new ItemClickListener() );

点击Item:

class ItemClickListener implements OnItemClickListener {
		@Override
		public void onItemClick(AdapterView<?> parent, View view, int position,
				long id) {
			ListView listView = (ListView) parent;
			Cursor cursor =  (Cursor) listView.getItemAtPosition(position);
			String name=cursor.getString(cursor.getColumnIndex("name"));
			Toast.makeText(getApplicationContext(), name, 1).show();
		}
	}