android基于ListView和CheckBox实现多选和全选记录的功能

应用开发中经常会有从数据库中读取数据显示，然后选中多条、全部记录并且删除的需求。在做定制系统联系人的时候也遇到这样的需求，下面写个简单的通过ListView和CheckBox实现多选、全选的例子。下面是具体的代码.

效果如下：

MultiSelectActivity

 
public class MultiSelectActivity extends Activity implements OnClickListener, 
    onItemClickListener { 
  private static final String TAG = "MultiSelectActivity"; 
  private ListView contactsDelList; 
  private Button contactsDelBtn; 
  private Button contactsCancelBtn; 
  private CheckBox selectAll; 
  private Cursor cursor; 
  private ContactsDeleteAdapter contactsDeleteAdapter; 
 
  private static final String[] PROJECTION = new String[] { Contacts._ID, 
      Contacts.DISPLAY_NAME }; 
  private static final int CONTACTS_ID_INDEX = 0; 
  private static final int DISPLAY_NAME_INDEX = 1; 
  private ContactsDeleteListItemViews holderViews; 
 
  private final class ContactsDeleteListItemViews { 
    TextView nameView; 
    CheckBox delCheckBox; 
  } 
 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.contacts_delete_activity); 
    contactsDelList = (ListView) findViewById(R.id.contacts_delete_list); 
    contactsDelBtn = (Button) findViewById(R.id.contacts_delete_btn); 
    contactsCancelBtn = (Button) findViewById(R.id.contacts_cancel_btn); 
    selectAll = (CheckBox) (findViewById(R.id.contacts_delete_list_header) 
 .findViewById(R.id.select_all)); 
    contactsDelList.setonItemClickListener(this); 
    contactsDelBtn.setonClickListener(this); 
    contactsCancelBtn.setonClickListener(this); 
    selectAll.setonClickListener(this); 
  } 
 
  @Override 
  protected void onResume() { 
    super.onResume(); 
    refreshData(); 
  } 
 
  // 查询数据库 
  private void refreshData() { 
    cursor = getContentResolver().query(Contacts.CONTENT_URI, PROJECTION, 
 null, null, null); 
    contactsDeleteAdapter = new ContactsDeleteAdapter(this, cursor); 
    contactsDelList.setAdapter(contactsDeleteAdapter); 
  } 
 
  class ContactsDeleteAdapter extends baseAdapter { 
    Cursor cur; 
    Map selectedMap; 
    HashSet delContactsIdSet; 
 
    public ContactsDeleteAdapter(Context context, Cursor c) { 
      cur = c; 
      // 保存每条记录是否被选中的状态 
      selectedMap = new HashMap(); 
      // 保存被选中记录作数据库表中的Id 
      delContactsIdSet = new HashSet(); 
 
      for (int i = 0; i < cur.getCount(); i++) { 
 selectedMap.put(i, false); 
      } 
    } 
 
    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
      if (convertView == null) { 
 convertView = LayoutInflater.from(MultiSelectActivity.this) 
     .inflate(R.layout.contacts_delete_list_item, null); 
 holderViews = new ContactsDeleteListItemViews(); 
 holderViews.nameView = (TextView) convertView 
     .findViewById(R.id.name); 
 holderViews.delCheckBox = (CheckBox) convertView 
     .findViewById(R.id.delete_list_item); 
 convertView.setTag(holderViews); 
      } 
      cur.moveToPosition(position); 
      ContactsDeleteListItemViews views = (ContactsDeleteListItemViews) convertView 
   .getTag(); 
      final String name = cur.getString(DISPLAY_NAME_INDEX); 
      views.nameView.setText(name); 
      views.delCheckBox.setChecked(selectedMap.get(position)); 
      // 保存记录Id 
      if (selectedMap.get(position)) { 
 delContactsIdSet.add(String.valueOf(cur 
     .getInt(CONTACTS_ID_INDEX))); 
      } else { 
 delContactsIdSet.remove(String.valueOf(cur 
     .getInt(CONTACTS_ID_INDEX))); 
      } 
      return convertView; 
    } 
 
    @Override 
    public int getCount() { 
      return cur.getCount(); 
    } 
 
    @Override 
    public Object getItem(int position) { 
      if (cur.moveToPosition(position)) { 
 return cur; 
      } else { 
 return null; 
      } 
    } 
 
    @Override 
    public long getItemId(int position) { 
      return position; 
    } 
  } 
 
  @Override 
  public void onClick(View v) { 
    switch (v.getId()) { 
    case R.id.select_all: 
      // 全选CheckBox的click事件处理 
      if (selectAll.isChecked()) { 
 for (int i = 0; i < contactsDeleteAdapter.getCount(); i++) { 
   contactsDeleteAdapter.selectedMap.put(i, true); 
   //click事件：全选checkbox被勾选则把所有的联系人ID添加到delContactsIdSet中 
   contactsDeleteAdapter.cur.moveToPosition(i); 
   contactsDeleteAdapter.delContactsIdSet.add(String 
.valueOf(contactsDeleteAdapter.cur 
    .getInt(CONTACTS_ID_INDEX))); 
 } 
 contactsDelBtn.setEnabled(true); 
      } else { 
 for (int i = 0; i < contactsDeleteAdapter.getCount(); i++) { 
   contactsDeleteAdapter.selectedMap.put(i, false); 
 } 
 //click事件：全选checkbox被取消勾选则把delContactsIdSet清空 
 contactsDeleteAdapter.delContactsIdSet.clear(); 
 contactsDelBtn.setEnabled(false); 
      } 
      contactsDeleteAdapter.notifyDataSetChanged(); 
      break; 
    case R.id.contacts_delete_btn: 
      new alertDialog.Builder(this).setTitle( 
   R.string.clear/confirm/iation_title).setMessage( 
   R.string.clear/confirm/iation).setNegativeButton( 
   android.R.string.cancel, null).setPositiveButton( 
   android.R.string.ok, new DialogInterface.onClickListener() { 
     @Override 
     public void onClick(DialogInterface dialog, int which) { 
final ProgressDialog progressDialog = ProgressDialog 
    .show( 
 MultiSelectActivity.this, 
 getString(R.string.clearProgress_title), 
 "", true, false); 
final AsyncTask task = new AsyncTask() { 
  @Override 
  protected Void doInBackground(Void... params) { 
    // 删除记录事件处理（我这里就不写详细的代码了） 
    return null; 
  } 
 
  @Override 
  protected void onPostExecute(Void result) { 
    progressDialog.dismiss(); 
  } 
}; 
progressDialog.show(); 
task.execute(); 
     } 
   }).setCancelable(true).create().show(); 
      break; 
    case R.id.contacts_cancel_btn: 
      // 取消事件处理 
      break; 
    } 
  } 
 
  @Override 
  public void onItemClick(AdapterView arg0, View view, int position, 
      long id) { 
    Log.i(TAG, "onItemClick"); 
    ContactsDeleteListItemViews views = (ContactsDeleteListItemViews) view 
 .getTag(); 
    views.delCheckBox.toggle(); 
    contactsDeleteAdapter.selectedMap.put(position, views.delCheckBox 
 .isChecked()); 
    contactsDeleteAdapter.notifyDataSetChanged(); 
    // 判断是否有记录没被选中，以便修改全选CheckBox勾选状态 
    if (contactsDeleteAdapter.selectedMap.containsValue(false)) { 
      selectAll.setChecked(false); 
    } else { 
      selectAll.setChecked(true); 
    } 
    // 判断是否有记录被选中，以便设置删除按钮是否可用 
    if (contactsDeleteAdapter.selectedMap.containsValue(true)) { 
      contactsDelBtn.setEnabled(true); 
    } else { 
      contactsDelBtn.setEnabled(false); 
    } 
  } 
} 

布局文件：contacts_delete_activity.xml

代码下载地址：源码下载

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