安卓ListView中CheckBox的使用（支持Item列表项的删除，全选，全不选）
ListView 自身提供了 CheckBox 只需要添加一行代码
getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
但是这种实现想要自己控制操作起来局限很多。所以我选择了自己添加CheckBox的方式。可以支持列表项的全选，删除，并保持数据的对应关系不会乱。
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列表中的CheckBox选中状态与一个Map进行绑定，利用?adapter.notifyDataSetChanged();来更新界面。
效果如下：
下面直接看代码把。
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main.xml
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<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#C9F1FF"> <ListView android:id="@id/android:list" android:layout_height="wrap_content" android:layout_width="fill_parent" android:fadingEdge="none"android:cacheColorHint="#00000000"/> <RelativeLayout android:layout_width="fill_parent" android:layout_height="40.0dip" android:layout_alignParentBottom="true"><CheckBox android:id="@+id/all_check_btn" android:layout_width="40.0dip" android:background="@drawable/bottom_back_bg"android:layout_height="40.0dip" android:layout_alignParentLeft="true"/></RelativeLayout></RelativeLayout>?
item.xml
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<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginRight="3.0dip" android:layout_weight="1.0" android:orientation="horizontal" android:descendantFocusability="blocksDescendants"> <CheckBox android:id="@+id/isCheakBox" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" /> <!-- 日报图片 --> <ImageView android:id="@+id/dailyPic" android:contentDescription="dailyPic" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="3.0dip" android:src="@drawable/reports" android:layout_toRightOf="@id/isCheakBox" android:layout_centerVertical="true"/> <!--附件名称 --> <TextView android:id="@+id/dailyName" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_toRightOf="@id/dailyPic" android:text="日报名称" android:layout_centerVertical="true" android:textColor="#000000" android:textSize="12.0sp" /> <ImageButton android:id="@+id/deleteAttachment" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="3.0dip" android:background="@drawable/delete" android:layout_centerVertical="true" android:focusable="false" android:layout_alignParentRight="true" android:layout_marginRight="20dp"/> <!--附件名称 --> </RelativeLayout>?
? Activity代码
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public class ListViewCheckBoxActivity extends ListActivity { private static final String TAG = "ListViewCheckBoxActivity"; private List<Item> itemList; private DraftDailyAdapter adapter; private Map<Integer, Boolean> isCheckedMap; private CheckBox allCheckBox; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); allCheckBox = (CheckBox)findViewById(R.id.all_check_btn); itemList = new ArrayList<Item>(); isCheckedMap = new HashMap<Integer, Boolean>(); //初始化数据 for(int i=0;i<8;i++){ Item item = new Item(); item.id=i; item.name = "第"+i+"篇日报"; itemList.add(item); isCheckedMap.put(i,false); } adapter = new DraftDailyAdapter(this,itemList); setListAdapter(adapter); allCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){ @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { Set<Integer> set = isCheckedMap.keySet(); Iterator<Integer> iterator = set.iterator(); if(isChecked){ while(iterator.hasNext()){ Integer keyId = iterator.next(); isCheckedMap.put(keyId,true); } }else{ while(iterator.hasNext()){ Integer keyId = iterator.next(); isCheckedMap.put(keyId,false); } } adapter.notifyDataSetChanged(); } }); } class DraftDailyAdapter extends BaseAdapter { public List<Item> list; private Context context; LayoutInflater inflater; public DraftDailyAdapter(Context context, List<Item> list) { super(); this.list = list; this.context = context; inflater = LayoutInflater.from(this.context); } @Override public int getCount() { return list == null ? 0 : list.size(); } @Override public Object getItem(int location) { return list.get(location); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; Item item = list.get(position); //Item的位置 final int listPosition = position; //这个记录item的id用于操作isCheckedMap来更新CheckBox的状态 final int id = item.id; if(convertView == null){ holder = new ViewHolder(); convertView = inflater.inflate(R.layout.item, null); holder.tvName = (TextView)convertView.findViewById(R.id.dailyName); holder.deleteButton = (ImageButton)convertView.findViewById(R.id.deleteAttachment); holder.cBox = (CheckBox)convertView.findViewById(R.id.isCheakBox); convertView.setTag(holder); }else{ holder = (ViewHolder) convertView.getTag(); } Log.d(TAG, "id="+id); holder.cBox.setChecked(isCheckedMap.get(id)); holder.tvName.setText(item.name); holder.deleteButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View paramView) { //Log.d(TAG, "deletePosition="+listPosition+""); //删除list中的数据 list.remove(listPosition); //删除Map中对应选中状态数据 isCheckedMap.remove(id); //通知列表数据修改 adapter.notifyDataSetChanged(); } }); holder.cBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){ @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if(isChecked){ isCheckedMap.put(id,true); }else{ isCheckedMap.put(id,false); } } }); return convertView; } public final class ViewHolder { public TextView tvName; public ImageButton deleteButton; public CheckBox cBox; } } class Item { private Integer id; private String name; } }?
资源文件见附件源代码。
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