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。
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。
main.xml
Java代码
- <?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
Java代码
- <?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
Java代码
- 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。
时间: 2024-09-30 07:18:59