android listview的应用

android listview的使用

/**
 * 
 * 
 * 
 * @author fansxnet 
 * 
 * 
 * @deprecated pojo
 * 
 * 
 */
public class Item {

	private int i;
	private Drawable imge;

	public int getI() {
		return i;
	}

	public void setI(int i) {
		this.i = i;
	}

	public Drawable getImge() {
		return imge;
	}

	public void setImge(Drawable imge) {
		this.imge = imge;
	}

}

 

 

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class ListViewTestActivity extends Activity {
	private ListView listview;
	private List<Item> itemlist;
	private Context context;
	private ListViewAdapter listadapter;
	private Button button;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		itemlist = new ArrayList<Item>();
		this.context = this;
		button = (Button)findViewById(R.id.button);
		button.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				itemlist = getData();
				listadapter.addItem(itemlist);
//				listadapter.notifyDataSetChanged();
			}
			
		});
		listview = (ListView) findViewById(R.id.listView);
		listview.setOnItemClickListener(new ListItemOnClickListener());
		listadapter = new ListViewAdapter(context);
		listview.setAdapter(listadapter);

	}

	private List<Item> getData(){
		List<Item> templist = new ArrayList<Item>();
		for(int i = 0;i<10;i++){
			Item item = new Item();
			item.setI(i);
			item.setImge(getResources().getDrawable(R.drawable.ic_launcher));
			templist.add(item);
		}
		return templist;
	}
	
	
	class ListViewAdapter extends BaseAdapter {

		private List<Item> itemlist;
		private Context mContext;

		public ListViewAdapter(Context context) {
			this.itemlist = new ArrayList<Item>();
			this.mContext = context;
		}
		
		public void addItem(List<Item> addlist){
			itemlist.addAll(addlist);
			notifyDataSetChanged();
		}

		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return itemlist.size() + 1;
		}

		@Override
		public Object getItem(int position) {
			// TODO Auto-generated method stub
			if (position == this.getCount() - 1) {
				return null;
			} else {
				return itemlist.get(position);
			}
		}

		@Override
		public long getItemId(int position) {
			// TODO Auto-generated method stub
			if (position != this.getCount() - 1) {
				return position;
			} else {
				return -1;
			}
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			Item item = new Item();
			if(position != this.getCount()-1){
				item = itemlist.get(position);
			}
			if(position == this.getCount()-1){
				LayoutInflater flater = (LayoutInflater) context.getSystemService
				(Context.LAYOUT_INFLATER_SERVICE);
				convertView = flater.inflate(R.layout.morestatus, null);
				return convertView;
			}
			convertView = LayoutInflater.from(mContext).inflate(R.layout.listviewitem, null);
			ImageView imageview = (ImageView)convertView.findViewById(R.id.imageView);
			TextView textview = (TextView)convertView.findViewById(R.id.textView);
			imageview.setImageDrawable(item.getImge());
			textview.setText(String.valueOf(item.getI()));
			return convertView;
		}
	}
	class ListItemOnClickListener implements OnItemClickListener{

		@Override
		public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
				long arg3) {
			long id = arg0.getItemIdAtPosition(arg2);
			if(id == -1){
				itemlist = getData();
				listadapter.addItem(itemlist);
				listadapter.notifyDataSetChanged();
			}else{
				Toast.makeText(context, String.valueOf(id), 5000).show();
			}
		}
		
	}
}