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copied!<p><em>Try this.</em></p> <pre><code>public class MainActivity extends Activity implements OnClickListener { public class LVSample3Adapter extends BaseAdapter{ private Context context; private List<LVSample3Item> itemList; public LVSample3Adapter(List<LVSample3Item> lstItems, MainActivity mainActivity) { // TODO Auto-generated constructor stub this.context=mainActivity; this.itemList=lstItems; } @Override public int getCount() { // TODO Auto-generated method stub return itemList.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub return itemList.get(position); } @Override public long getItemId(int position) { // TODO Auto-generated method stub return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub Log.e("lstItems1:", String.valueOf(position)); LVSample3Item item = itemList.get(position); convertView =LayoutInflater.from(context).inflate(R.layout.list, parent, false); TextView t1=(TextView)convertView.findViewById(R.id.textView1); t1.setText(item.getTitle()); CheckBox chb1=(CheckBox)convertView.findViewById(R.id.checkBox1); chb1.setChecked(item.getstate()); return convertView; } } /** Called when the activity is first created. */ private ListView lv; private ListAdapter adapter; private Button btn1,btn2; private List<LVSample3Item> lstItems; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); btn1=(Button)findViewById(R.id.button1); btn2=(Button)findViewById(R.id.button2); btn1.setOnClickListener(this); btn2.setOnClickListener(this); lstItems = new ArrayList<LVSample3Item>(); LVSample3Item item = new LVSample3Item("drinks",false); lstItems.add(item); item = new LVSample3Item("chat",false); lstItems.add(item); item = new LVSample3Item("chat1",true); lstItems.add(item); item = new LVSample3Item("chat2",false); lstItems.add(item); adapter = new LVSample3Adapter(lstItems, this); lv=(ListView)findViewById(R.id.listView1); lv.setAdapter(adapter); } @Override public void onClick(View v) { // TODO Auto-generated method stub if(v.getId()==R.id.button1){ Log.e("lstItems:", String.valueOf(lstItems.size())); for(int i=0;i<lstItems.size();i++){ LVSample3Item item=lstItems.get(i); if(!item.getstate()){ item.setpath(true); } } ((BaseAdapter) adapter).notifyDataSetChanged(); }else if(v.getId()==R.id.button2){ for(int i=0;i<lstItems.size();i++){ LVSample3Item item=lstItems.get(i); if(item.getstate()){ item.setpath(false); } } ((BaseAdapter) adapter).notifyDataSetChanged(); } } </code></pre> <p>}</p> <pre><code>public class LVSample3Item implements Serializable { private String title; private boolean state; public LVSample3Item(String title,boolean imagepath) { this.title = title; this.state=imagepath; } public String getTitle() { return title; } public boolean getstate() { return state; } public void setTitle(String title) { this.title = title; } public void setpath(boolean imagepath) { this.state = imagepath; } </code></pre> <p>}</p>

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