ListView复选框保存状态

时间:2015-07-10 05:49:58

标签: android sqlite listview checkbox

我正在使用Checkbox与每个列表项,当用户点击任何复选框时我将该列表项存储到SQLite数据库中,但每当我重新启动我的应用程序时,不检查列表项我检查的那些早。

那么如何将状态保存到Checkbox?

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    // convert view = design
    View v = convertView;

    if (v == null) {

        holder = new ViewHolder();
        v = vi.inflate(Resource, null);

        holder.tvName = (TextView) v.findViewById(R.id.textView1);          
        holder.checkBox = (CheckBox) v.findViewById(R.id.cbBox);

        boolean strDataExist = activity.myDb.Exists(actorList.get(position).getName());
        if(strDataExist)
        {
            actorList.get(position).setChecked(true);
        }
        else
        {
            actorList.get(position).setChecked(false);
        }

        v.setTag(holder);

    } 
    else 
    {
        holder = (ViewHolder) v.getTag();           
    }           

4 个答案:

答案 0 :(得分:4)

你应该在膨胀之前检查每个数据是否在数据库中,在结果的基础上你应该检查复选框的值,你没有检查。

您需要检查

holder.checkBox.setChecked(true/false);

答案 1 :(得分:3)

在getView方法中,代码应为

    if(strDataExist)
    {
        holder.checkBox.setChecked(true);
    }
    else
    {
        holder.checkBox.setChecked(false);
    }

答案 2 :(得分:0)

我不确定你的问题,但我会尽力帮助你。

我认为您希望checkbox checkeddatabase一起使用,取决于您之前是否已保存到getView

在方法public boolean Exists(String strServiceName)中,您应该使用方法holder.checkBox = (CheckBox) v.findViewById(R.id.cbBox); holder.checkBox.setChecked(exists(actorList.get(position).getName().toString())); 检查数据库中是否存在服务(对于方法名称,您应使用小写)。

...

getView(...){
 //...
 if (databaseHandler.exists(serviceName)){
  Service service = new Service(serviceName, holder.checkBox.isChecked());
  databaseHandler.save(service);
 }
}

问候。

UPDATE 如果要在数据库中存在服务名称时保存服务状态。这可以解决问题:

let explosionEmitterNode = SKEmitterNode(fileNamed:"the file name")
sprite.addChild(explosionEmitterNode)

答案 3 :(得分:0)

尝试这种方式,这对我有用

public class CustomAdapter extends BaseAdapter {
    private final LayoutInflater inflater;
    private final Context context;
    private List<ModelPooja> listData;

    public CustomAdapter(Context mainActivity, List<ModelPooja> listData) {
        context = mainActivity;
        this.listData = listData;
        inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getCount() {
        return listData.size();
    }

    @Override
    public Object getItem(int position) {
        return listData.get(position);
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

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

        if (convertView == null) {
            holder = new ViewHolder();
            convertView = inflater.inflate(R.layout.list_item_poojaselection, null);
            holder.tv = (TextView) convertView.findViewById(R.id.list_item_poojaname);
            holder.checks = (CheckBox) convertView.findViewById(R.id.list_item_poojacheck);
            convertView.setTag(holder);
        }else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.checks.setOnCheckedChangeListener(null);
        holder.checks.setFocusable(false);

        if (listData.get(position).isselected) {
            holder.checks.setChecked(true);
        } else {
            holder.checks.setChecked(false);
        }

        holder.checks.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton cb, boolean b) {

                if (checkMaxLimit()) {

                    if (listData.get(position).isselected && b) {
                        holder.checks.setChecked(false);
                        listData.get(position).isselected = false;

                    } else {
                        holder.checks.setChecked(false);
                        listData.get(position).isselected = false;
                        Toast.makeText(context, "Max limit reached", Toast.LENGTH_SHORT).show();
                    }
                } else {
                    if (b) {
                        listData.get(position).isselected = true;
                    } else {
                        listData.get(position).isselected = false;
                    }
                }
            }
        });

        holder.tv.setText(listData.get(position).getPOOJA_LISTING_NAME());
        return convertView;
    }

    public boolean checkMaxLimit() {
        int countermax = 0;
        for(ModelPooja item : listData){
            if(item.isselected){
                countermax++;
            }
        }
        return countermax >= 5;
    }

    public class ViewHolder {
        TextView tv;
        public CheckBox checks;
    }
}