Question

我使用自定义列表视图来显示sqlite数据库中的数据。我的清单项目有文本视图，按钮，复选框。请建议我将执行以下任务的适配器，

所有字符串值都在equalesnt textviews中更新
根据布尔值，复选框应选中/取消选中。

当我点击按钮时，它会将我带到新屏幕并传递按钮的ID。

请建议我现在该做什么。新的想法也欢迎。

关注我的代码。

    public class GuestListAdapter extends BaseAdapter implements OnClickListener{
        Context context;
        ArrayList<String> arrayListFirstName;
        ArrayList<String> arrayListLastName;
        ArrayList<String> arrayListGuests;
        ArrayList<String> arrayCustomOne;
        ArrayList<String> arrTicketId;
        private ArrayList<Boolean> checks=new ArrayList<Boolean>();
        public GuestListAdapter(Context mcontext, ArrayList<String> arrListFN,
                ArrayList<String> arrListLN, ArrayList<String> arrListGuest,
                ArrayList<String> arrTicketID,ArrayList<String> arrCustOne) {
            arrayListFirstName = arrListFN;
            arrayListLastName = arrListLN;
            arrayListGuests = arrListGuest;
            arrayCustomOne = arrCustOne;
            context = mcontext;

            for (int i = 0; i < arrayListFirstName.size(); i++) {
                checks.add(i, false);
            }
        }

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return arrayListFirstName.size();
        }

        @Override
        public Object getItem(int position) {
            // TODO Auto-generated method stub
            return arrayListFirstName.get(position);
        }

        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return position;
        }

        @Override
        public View getView(int position, View view, ViewGroup parent) {
            // TODO Auto-generated method stub
            if (view == null) {
                LayoutInflater inflater = LayoutInflater.from(parent.getContext());
                view = inflater.inflate(R.layout.guest_list_item, parent, false);
            }

            final String dataModel = (String) arrayListFirstName.get(position);

            TextView txtFirstName = (TextView) view
                    .findViewById(R.id.txt_firstname);
            txtFirstName.setText(arrayListFirstName.get(position));
            TextView txtLastName = (TextView) view.findViewById(R.id.txt_lastname);
            txtLastName.setText(arrayListLastName.get(position));
            TextView txtGuestCount = (TextView) view
                    .findViewById(R.id.txt_guest_count);
            txtGuestCount.setText(arrayListGuests.get(position));
            Button btnInfo = (Button) view.findViewById(R.id.btn_info);
            // btnInfo.setId(position);
            CheckBox checkBoxCheckins = (CheckBox) view
                    .findViewById(R.id.checkBoxIsCheckedIn);
            checkBoxCheckins.setTag(Integer.valueOf(position));

            btnInfo.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    // int id = Integer.parseInt(v.getTag().toString());

                    // Log.d("", "Clicked ID "+id);
                    Intent intent = new Intent(context, InfoScreen.class);
                    context.startActivity(intent);
                    System.out.println("Adap button **********");

                }
            });
            checkBoxCheckins
                    .setOnCheckedChangeListener(new OnCheckedChangeListener() {

                        @Override
                        public void onCheckedChanged(CompoundButton buttonView,
                                boolean isChecked) {
                            System.out.println("Adap checked **********");
                            Integer integ = (Integer)buttonView.getTag();

                               checks.set(integ.intValue(), false);
                        }
                    });
            if (checks.get(position)) {
                checkBoxCheckins.setChecked(checks.get(position));
                  // do some stuff if wanted..
                } else {
                    checkBoxCheckins.setChecked(checks.get(position));
                  // do some stuff if wanted..
                }
            return view;
        }

        @Override
        public void onClick(View view) {
            // TODO Auto-generated method stub
             Integer index = (Integer)view.getTag();
             boolean state = checks.get(index.intValue());

             checks.set(index.intValue(), !state);
        }

    }


this is my setter class

public class GuestList {

    String mFirstName;
    String mLastName;
    String mTicketI;
    String mGuestCount;

    public String getmFirstName() {
        return mFirstName;
    }

    public void setmFirstName(String mFirstName) {
        this.mFirstName = mFirstName;
    }

    public String getmLastName() {
        return mLastName;
    }

    public void setmLastName(String mLastName) {
        this.mLastName = mLastName;
    }

    public String getmTicketI() {
        return mTicketI;
    }

    public void setmTicketI(String mTicketI) {
        this.mTicketI = mTicketI;
    }

    public String getmGuestCount() {
        return mGuestCount;
    }

    public void setmGuestCount(String mGuestCount) {
        this.mGuestCount = mGuestCount;
    }

}

在listview类中发送像这样的arraylist，

cursorAdapter = new GuestListAdapter(GuestListScreen.this,
            arrFirstName, arrLastName, arrGuests, arrTicketId, arrCustomOne);
    listViewGuests.setAdapter(cursorAdapter);

Answer 1

您应该使用BaseAdapter。创建一个类调用MyAdapter并扩展BaseAdater。在该类中重写所需的方法。并且在类的getView方法中膨胀你的xml文件并根据位置放置数据。

如果值来自数据库，则获取Cursor并迭代它并获得所需的值。

希望这会有所帮助

带有Checkbox的Listview和在android中使用Array适配器的按钮

1 个答案: