Question

我有listview的复选框和“保存”按钮无论我选中哪个复选框并单击“保存”按钮，我都希望将与这些已检查行相关的数据保存到数据库中这是我的代码

public class CardDetailsAdapter extends BaseAdapter {    
private static ArrayList<CardDetails> searchArrayList;          
private LayoutInflater mInflater;       

 private boolean[] itemChecked =  new boolean[100];

public CardDetailsAdapter(Context context, ArrayList<CardDetails> results) {
     map = new HashMap<Integer, Boolean>();
    searchArrayList = results;
    mInflater = LayoutInflater.from(context);
}

public int getCount() {
    return searchArrayList.size();
}

public Object getItem(int position) {
    return searchArrayList.get(position);
}

public long getItemId(int position) {
    return position;
}

public View getView(final int position, View convertView, final ViewGroup parent) {
    final ViewHolder holder;

    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.welcomelistview, null);
        holder = new ViewHolder();
        holder.bankName = (TextView) convertView.findViewById(R.id.BankNameID);
        holder.messages = (TextView) convertView.findViewById(R.id.messageID);
        holder.chkbox = (CheckBox) convertView.findViewById(R.id.chkBoxID);
        System.out.println("is checked==> " + holder.chkbox.isChecked());

        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }        
    holder.bankName.setText(searchArrayList.get(position).getBankName());
    holder.messages.setText(searchArrayList.get(position).getMessages());       
    holder.chkbox.setChecked(false);
    // save position and checking status into tag
    holder.chkbox.setTag(position);
    holder.chkbox.setOnClickListener(new OnClickListener() {            
        public void onClick(View v) {
             HashMap<Integer, Boolean> mSimpleAdapter = new HashMap<Integer, Boolean>();
             int p = (Integer) (v.getTag());
                if (holder.chkbox.isChecked() == true) {
                    itemChecked[Integer.valueOf(position)] = holder.chkbox.isChecked();  
                }else{
                    itemChecked[Integer.valueOf(position)] = holder.chkbox.isChecked();  
                 }

             mSimpleAdapter.put(p, itemChecked[position]);
             holder.chkbox.setChecked(itemChecked[position]); 
        }
    });
    return convertView;
}

static class ViewHolder {
    TextView bankName;
    TextView messages;
    CheckBox chkbox;
}}

和活动类

import com.ispl.CFSMS.helper.CardDetailsAdapter;
    public class WelcomePage extends Activity{
     CardDetailsAdapter mListAdapter;
    ArrayList<Integer> arList = new ArrayList<Integer>();
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.welcomepage); 
        final ArrayList<CardDetails> cardResults = GetCardDetails();
        final ListView welcomelist = (ListView) findViewById(R.id.welcomelistID);        
        welcomelist.setAdapter(new CardDetailsAdapter(this, cardResults));                      
        welcomelist.setOnItemLongClickListener(new OnItemLongClickListener() {
            public boolean onItemLongClick(AdapterView<?> a, View v, int position, long id) {
                Object o = welcomelist.getItemAtPosition(position);
                CardDetails fullObject = (CardDetails)o;
                Intent r=new Intent(WelcomePage.this , CardMenuActivity.class);
                r.putExtra("BankName", fullObject.getBankName());
                r.putExtra("CardNumber", fullObject.getCardNumber());
                startActivityForResult(r, position);
                return false;
            }
        });

        CheckBox checkbox = (CheckBox)findViewById(R.id.chkBoxID);
        Button saveTODbBtn = (Button)findViewById(R.id.saveID);
        saveTODbBtn.setOnClickListener(new OnClickListener() {              
            public void onClick(View v) {               
                //get the checkbox status and save related details into database
                Intent intent=new Intent(WelcomePage.this, BankProjectActivity.class);
                startActivity(intent);
            }
        });

    }    
 private ArrayList<CardDetails> GetCardDetails(){
        ArrayList<CardDetails> carddetailresults = new ArrayList<CardDetails>();        
         CardDetails sr1 = new CardDetails();

         sr1.setBankName("Select All");
         sr1.setCardNumber("");
         sr1.setMessages("");
         carddetailresults.add(sr1);

         sr1 = new CardDetails();    
         sr1.setBankName("HDFC Bank" +" "+ "xxxxx1234");
         sr1.setMessages("Messages: " + "10");
         carddetailresults.add(sr1);

         sr1 = new CardDetails();
         sr1.setBankName("ICICI" + " "+ "xxxxx2134");
         sr1.setMessages("Messages: 5");
         carddetailresults.add(sr1);

         sr1 = new CardDetails();
         sr1.setBankName("HSBC" + " "+ "xxxxx8796");
         sr1.setMessages("Messages: 2");
         carddetailresults.add(sr1);

         return carddetailresults;
 }}

在Adaptar类中我能够获得状态。但是如何保存这些状态并获取活动类中的所有状态，以便在单击保存按钮时保存与这些已检查行相关的所有数据...？

Answer 1

您好GetCardDetails()方法添加sr1.setSelected(true)或sr1.setSelected(false)

适配器中的

添加以下内容

  public static ArrayList<Boolean> itemChecked1 = null;  
  public CardDetailsAdapter( Context context, ArrayList<CardDetails> results) {
    super( context, R.layout.welcomelistview, R.id.BankNameID, results );
    searchArrayList = results;
    getContext = context;
    mInflater = LayoutInflater.from(context) ;
    itemChecked1 = new ArrayList<Boolean>();
    for (int i = 0; i < results.size(); i++) {
        itemChecked1.add(i, results.get(i).isSelected()); // initializes all items value with false         
    }
}

中的

holder.chkbox.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            CheckBox cb = (CheckBox) v;
            CardDetails planet = (CardDetails) cb.getTag();
            //planet.setSelected(cb.isChecked());
            if (holder.chkbox.isChecked()) {
                itemChecked1.set(position, true);
                holder.chkbox.setChecked(true);
                planet.setSelected(true);
            } else if (!holder.chkbox.isChecked()) {
                itemChecked1.set(position, false);
                holder.chkbox.setChecked(false);
                planet.setSelected(false);
            }
        }
    });

Answer 2

public View getView(final int position, View convertView,ViewGroup paramViewGroup)
{
    final ViewHolder holder;
    LayoutInflater inflater=(LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE);
    if (convertView == null) 
    {
        convertView=inflater.inflate(R.layout.addressbook, null);holder = new ViewHolder();
        holder.adddress_name=(TextView)convertView.findViewById(R.id.addressbook_name);
        holder.adddress_number=(TextView)convertView.findViewById(R.id.address_number);
        holder.adddress_name.setText(adddressbook_name.get(position).toString().trim())
        holder.adddress_number.setText(addressbook_number.get(position).toString().trim());
        holder.addressbook_check=(CheckBox)convertView.findViewById(R.id.address_check);convertView.setTag(holder); 
    }
    else
    {
        holder = (ViewHolder) convertView.getTag();
    }

    holder.addressbook_check.setId(position);

    holder.addressbook_check.setOnClickListener(new OnClickListener()
        {
            public void onClick(View v) 
            {
                CheckBox cb = (CheckBox) v;
                int id = cb.getId();
                if (thumbnailsselection[id])
                {
                    cb.setChecked(false);
                    thumbnailsselection[id] = false;
                }
                else
                {
                    cb.setChecked(true);
                    thumbnailsselection[id] = true;
                }
            }
        });

    holder.addressbook_check.setChecked(thumbnailsselection[position]);
    return convertView;
}

class ViewHolder
{  
    TextView adddress_name;
    TextView adddress_number;
    CheckBox addressbook_check;
}

Android-在列表视图中保存复选框状态

2 个答案: