android listview+checkbox示例

package simtice.test.listiview; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import simtice.test.listview.viewholder.ViewHolder; import android.app.Activity; import android.content.Context; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.BaseAdapter; import android.widget.Button; import android.widget.CheckBox; import android.widget.ListView; import android.widget.TextView; import android.widget.AdapterView.OnItemClickListener; public class CopyOfMainActivity extends Activity { TextView tv = null; ListView lv = null; Button btn_selectAll = null; Button btn_inverseSelect = null; Button btn_calcel = null; String name[] = { "G1", "G2", "G3", "G4", "G5", "G6", "G7", "G8", "G9", "G10", "G11", "G12", "G13", "G14" }; ArrayList<String> listStr = null; private List<HashMap<String, Object>> list = null; private MyAdapter adapter; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tv = (TextView) this.findViewById(R.id.tv); lv = (ListView) this.findViewById(R.id.lv); btn_selectAll = (Button) this.findViewById(R.id.selectall); btn_inverseSelect = (Button) this.findViewById(R.id.inverseselect); btn_calcel = (Button) this.findViewById(R.id.cancel); showCheckBoxListView(); //全选 btn_selectAll.setOnClickListener(new OnClickListener(){ @Override public void onClick(View arg0) { listStr = new ArrayList<String>(); for(int i=0;i<list.size();i++){ MyAdapter.isSelected.put(i,true); listStr.add(name[i]); } adapter.notifyDataSetChanged();//注意这一句必须加上，否则checkbox无法正常更新状态 tv.setText("已选中"+listStr.size()+"项"); } }); //反选 btn_inverseSelect.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { for(int i=0;i<list.size();i++){ if(MyAdapter.isSelected.get(i)==false){ MyAdapter.isSelected.put(i, true); listStr.add(name[i]); } else{ MyAdapter.isSelected.put(i, false); listStr.remove(name[i]); } } adapter.notifyDataSetChanged(); tv.setText("已选中"+listStr.size()+"项"); } }); //取消已选 btn_calcel.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { for(int i=0;i<list.size();i++){ if(MyAdapter.isSelected.get(i)==true){ MyAdapter.isSelected.put(i, false); listStr.remove(name[i]); } } adapter.notifyDataSetChanged(); tv.setText("已选中"+listStr.size()+"项"); } }); } // 显示带有checkbox的listview public void showCheckBoxListView() { list = new ArrayList<HashMap<String, Object>>(); for (int i = 0; i < name.length; i++) { HashMap<String, Object> map = new HashMap<String, Object>(); map.put("item_tv", name[i]); map.put("item_cb", false); list.add(map); adapter = new MyAdapter(this, list, R.layout.listviewitem, new String[] { "item_tv", "item_cb" }, new int[] { R.id.item_tv, R.id.item_cb }); lv.setAdapter(adapter); listStr = new ArrayList<String>(); lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View view, int position, long arg3) { ViewHolder holder = (ViewHolder) view.getTag(); holder.cb.toggle();// 在每次获取点击的item时改变checkbox的状态 MyAdapter.isSelected.put(position, holder.cb.isChecked()); // 同时修改map的值保存状态 if (holder.cb.isChecked() == true) { listStr.add(name[position]); } else { listStr.remove(name[position]); } tv.setText("已选中"+listStr.size()+"项"); } }); } } //为listview自定义适配器内部类 public static class MyAdapter extends BaseAdapter { public static HashMap<Integer, Boolean> isSelected; private Context context = null; private LayoutInflater inflater = null; private List<HashMap<String, Object>> list = null; private String keyString[] = null; private String itemString = null; // 记录每个item中textview的值 private int idValue[] = null;// id值 public MyAdapter(Context context, List<HashMap<String, Object>> list,int resource, String[] from, int[] to) { this.context = context; this.list = list; keyString = new String[from.length]; idValue = new int[to.length]; System.arraycopy(from, 0, keyString, 0, from.length); System.arraycopy(to, 0, idValue, 0, to.length); inflater = LayoutInflater.from(context); init(); } // 初始化 设置所有checkbox都为未选择 public void init() { isSelected = new HashMap<Integer, Boolean>(); for (int i = 0; i < list.size(); i++) { isSelected.put(i, false); } } @Override public int getCount() { return list.size(); } @Override public Object getItem(int arg0) { return list.get(arg0); } @Override public long getItemId(int arg0) { return 0; } @Override public View getView(int position, View view, ViewGroup arg2) { ViewHolder holder = null; if (holder == null) { holder = new ViewHolder(); if (view == null) { view = inflater.inflate(R.layout.listviewitem, null); } holder.tv = (TextView) view.findViewById(R.id.item_tv); holder.cb = (CheckBox) view.findViewById(R.id.item_cb); view.setTag(holder); } else { holder = (ViewHolder) view.getTag(); } HashMap<String, Object> map = list.get(position); if (map != null) { itemString = (String) map.get(keyString[0]); holder.tv.setText(itemString); } holder.cb.setChecked(isSelected.get(position)); return view; } } }