Using ListView adapter

UsingListViewAdapter.java

public class MyListView extends Activity {

	private ListView listView;
	//private List<String> data = new ArrayList<String>();
	@Override
	public void onCreate(Bundle savedInstanceState){
		super.onCreate(savedInstanceState);
		
		listView = new ListView(this);
		listView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1,getData()));
		setContentView(listView);
	}
	private List<String> getData(){
		
		List<String> data = new ArrayList<String>();
		data.add("1");
		data.add("2");
		data.add("3");
		data.add("4");
		
		return data;
	}
}

public class MyListView2 extends Activity {

	private ListView listView;
	//private List<String> data = new ArrayList<String>();
	@Override
	public void onCreate(Bundle savedInstanceState){
		super.onCreate(savedInstanceState);
		
		listView = new ListView(this);
		Cursor cursor = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
		startManagingCursor(cursor);
		
		ListAdapter listAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_expandable_list_item_1, 
				cursor,
				new String[]{ContactsContract.Contacts.DISPLAY_NAME}, 
				new int[]{android.R.id.text1});
		
		listView.setAdapter(listAdapter);
		setContentView(listView);
	}
}



public class MyListView3 extends ListActivity {


	// private List<String> data = new ArrayList<String>();
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		SimpleAdapter adapter = new SimpleAdapter(this,getData(),R.layout.vlist,
				new String[]{"title","info","img"},
				new int[]{R.id.title,R.id.info,R.id.img});
		setListAdapter(adapter);
	}

	private List<Map<String, Object>> getData() {
		List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

		Map<String, Object> map = new HashMap<String, Object>();
		map.put("title", "G1");
		map.put("info", "google 1");
		map.put("img", R.drawable.i1);
		list.add(map);

		map = new HashMap<String, Object>();
		map.put("title", "G2");
		map.put("info", "google 2");
		map.put("img", R.drawable.i2);
		list.add(map);

		map = new HashMap<String, Object>();
		map.put("title", "G3");
		map.put("info", "google 3");
		map.put("img", R.drawable.i3);
		list.add(map);
		
		return list;
	}
}


public class MyListView4 extends ListActivity {


	private List<Map<String, Object>> mData;
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		mData = getData();
		MyAdapter adapter = new MyAdapter(this);
		setListAdapter(adapter);
	}

	private List<Map<String, Object>> getData() {
		List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

		Map<String, Object> map = new HashMap<String, Object>();
		map.put("title", "G1");
		map.put("info", "google 1");
		map.put("img", R.drawable.i1);
		list.add(map);

		map = new HashMap<String, Object>();
		map.put("title", "G2");
		map.put("info", "google 2");
		map.put("img", R.drawable.i2);
		list.add(map);

		map = new HashMap<String, Object>();
		map.put("title", "G3");
		map.put("info", "google 3");
		map.put("img", R.drawable.i3);
		list.add(map);
		
		return list;
	}
	
	// ListView 涓煇椤硅閫変腑鍚庣殑閫昏緫
	@Override
	protected void onListItemClick(ListView l, View v, int position, long id) {
		
		Log.v("MyListView4-click", (String)mData.get(position).get("title"));
	}
	
	/**
	 * listview涓偣鍑绘寜閿脊鍑哄璇濇
	 */
	public void showInfo(){
		new AlertDialog.Builder(this)
		.setTitle("鎴戠殑listview")
		.setMessage("浠嬬粛...")
		.setPositiveButton("纭畾", new DialogInterface.OnClickListener() {
			public void onClick(DialogInterface dialog, int which) {
			}
		})
		.show();
		
	}
	
	
	
	public final class ViewHolder{
		public ImageView img;
		public TextView title;
		public TextView info;
		public Button viewBtn;
	}
	
	
	public class MyAdapter extends BaseAdapter{

		private LayoutInflater mInflater;
		
		
		public MyAdapter(Context context){
			this.mInflater = LayoutInflater.from(context);
		}
		public int getCount() {
			// TODO Auto-generated method stub
			return mData.size();
		}

		public Object getItem(int arg0) {
			// TODO Auto-generated method stub
			return null;
		}

		public long getItemId(int arg0) {
			// TODO Auto-generated method stub
			return 0;
		}

		public View getView(int position, View convertView, ViewGroup parent) {
			
			ViewHolder holder = null;
			if (convertView == null) {
				
				holder=new ViewHolder();  
				
				convertView = mInflater.inflate(R.layout.vlist2, null);
				holder.img = (ImageView)convertView.findViewById(R.id.img);
				holder.title = (TextView)convertView.findViewById(R.id.title);
				holder.info = (TextView)convertView.findViewById(R.id.info);
				holder.viewBtn = (Button)convertView.findViewById(R.id.view_btn);
				convertView.setTag(holder);
				
			}else {
				
				holder = (ViewHolder)convertView.getTag();
			}
			
			
			holder.img.setBackgroundResource((Integer)mData.get(position).get("img"));
			holder.title.setText((String)mData.get(position).get("title"));
			holder.info.setText((String)mData.get(position).get("info"));
			
			holder.viewBtn.setOnClickListener(new View.OnClickListener() {
				
				public void onClick(View v) {
					showInfo();					
				}
			});
			
			
			return convertView;
		}
		
	}
}