ListView之BaseAdapter详解

一般都需要扩展BaseAdapter对象，需要重写4个方法

1

public int getCount()

该方法需要返回控制该Adapter将会包含多少个列表项目

2

public Object getItem(int position)

该方法返回值决定第position处的列表的内容

3

public long getItemId(int position)

该方法的返回值决定第position处的列表项ID

4 该方法返回值决定第position处的列表项组件

public View getView(int position, View convertView, ViewGroup parent)

该方法返回值决定第position处的列表项组件

下边是一个例子

public class MyAdapter extends BaseAdapter{    LayoutInflater inflater;    List<ScanResult> ls;    public MyAdapter(Context context,List<ScanResult> objects){        this.inflater=LayoutInflater.from(context);        this.ls=objects;    }    @Override    public int getCount() {        return ls.size();    }    @Override    public Object getItem(int position) {        return position;    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ScanResult scanResult=ls.get(position);        View v=inflater.inflate(R.layout.item,null);        TextView tv= (TextView) v.findViewById(R.id.textView);        TextView tv2= (TextView) v.findViewById(R.id.textView2);        Log.i("Main","jia");        tv.setText(scanResult.SSID);        tv2.setText(scanResult.level+"");        return v;    }}