android - 复选框会在 Android 中自动选中

Question

我有一个 ListView ，其中有几行由 inflator 创建，每行有两个 TextView 和三个复选框。一切正常，但当我用手指向下或向上滚动时，我注意到某些复选框会自动选中。我不知道为什么它在使用滚动时会这样做。

我的代码:

  public class InteractiveArrayAdapter extends ArrayAdapter<Student> implements
    Filterable {
final String NAMESPACE = "http://ws.sams.com";
String URL = "http://88.198.82.92:8080/sams1/services/InsertDataWS?WSDL"; // usint
                                                                            // localhost
final String METHOD_NAME = "insertApsentData";
final String SOAP_ACTION = "http://ws.sams.com/insertApsentData";

List<Integer> checkBoxState = new ArrayList<Integer>(200);
// List<Integer> checkBoxState2 = new ArrayList<Integer>(200);
// List<Integer> checkBoxState3 = new ArrayList<Integer>(200);
// Set<Integer> numbers = new HashSet<Integer>();

private final List<Student> StudentNamesList; // for the student names .
private final List<Student> StudentIdsList; // for the student ids .
private final Activity context;

public InteractiveArrayAdapter(Activity context,
        List<Student> StudentNamesList, List<Student> StudentIdsList) {
    super(context, R.layout.activity_list, StudentNamesList);
    this.context = context;
    this.StudentNamesList = StudentNamesList;
    this.StudentIdsList = StudentIdsList;
}

protected Button sumbit;

class ViewHolder {
    protected TextView StudentName;
    protected TextView StudentId;
    protected CheckBox checkbox;
    protected CheckBox checkbox2;
    protected CheckBox checkbox3;
    protected TableRow row;
}

public View getView(final int position, View convertView, ViewGroup parent) {
    View view = null;
    if (convertView == null) {
        LayoutInflater inflator = context.getLayoutInflater();
        view = inflator.inflate(R.layout.rep, null);
        ViewHolder viewHolder = new ViewHolder();
        viewHolder.StudentName = (TextView) view
                .findViewById(R.id.TextView07);
        viewHolder.StudentId = (TextView) view
                .findViewById(R.id.TextView08);
        viewHolder.checkbox = (CheckBox) view.findViewById(R.id.CheckBox05);
        viewHolder.checkbox2 = (CheckBox) view
                .findViewById(R.id.CheckBox02);
        viewHolder.checkbox3 = (CheckBox) view
                .findViewById(R.id.CheckBox01);
        viewHolder.row = (TableRow) view.findViewById(R.id.TableRow05);
        // final EditText searchEdit = (EditText)
        // view.findViewById(R.id.searchlable);
        Typeface font = Typeface.createFromAsset(context.getAssets(),
                "extrafine.ttf");
        Typeface fontar = Typeface.createFromAsset(context.getAssets(),
                "extrafinear.ttf");
        viewHolder.StudentName.setTypeface(fontar);
        viewHolder.StudentId.setTypeface(font);

        sumbit = (Button) context.findViewById(R.id.sumbitbtn);

        view.setTag(viewHolder);
        viewHolder.row.setTag(StudentNamesList.get(position)); // here note
        viewHolder.checkbox.setTag(StudentNamesList.get(position));
        viewHolder.checkbox2.setTag(StudentNamesList.get(position));
        viewHolder.checkbox3.setTag(StudentNamesList.get(position));
    } else {
        view = convertView;
        ((ViewHolder) view.getTag()).checkbox.setTag(StudentNamesList
                .get(position));
        ((ViewHolder) view.getTag()).checkbox2.setTag(StudentNamesList
                .get(position));
        ((ViewHolder) view.getTag()).checkbox3.setTag(StudentNamesList
                .get(position));
        ((ViewHolder) view.getTag()).row.setTag(StudentNamesList
                .get(position));
    }

    final ViewHolder holder = (ViewHolder) view.getTag();
    holder.StudentName.setText(StudentNamesList.get(position).getName());
    holder.StudentId.setText(StudentIdsList.get(position).getName());
    holder.checkbox.setChecked(StudentNamesList.get(position).isSelected());
    holder.checkbox2
            .setChecked(StudentNamesList.get(position).isSelected());
    holder.checkbox3
            .setChecked(StudentNamesList.get(position).isSelected());

    holder.checkbox
            .setOnCheckedChangeListener(new OnCheckedChangeListener() {

                @Override
                public void onCheckedChanged(CompoundButton buttonView,
                        boolean isChecked) {

                    if (isChecked) {
                        holder.checkbox2.setChecked(false);
                        holder.checkbox3.setChecked(false);
                        holder.row.setBackgroundResource(R.drawable.green);
                    } else {

                    }

                    ((Student) holder.checkbox.getTag()).setSelected(true);

                    if (((CheckBox) holder.checkbox).isChecked()) {
                        ViewGroup row1 = (ViewGroup) holder.checkbox
                                .getParent();

                        View view1 = ((ViewGroup) row1).getChildAt(4);
                        if (view1 instanceof TextView) {

                            holder.StudentName = (TextView) view1;

                            checkBoxState.add(Integer
                                    .parseInt(holder.StudentName.getText()
                                            .toString()));
                        }

                    }

                }
            });

    holder.checkbox3
            .setOnCheckedChangeListener(new OnCheckedChangeListener() {

                @Override
                public void onCheckedChanged(CompoundButton buttonView,
                        boolean isChecked) {

                    if (isChecked) {
                        holder.row.setBackgroundResource(R.drawable.red);
                        holder.checkbox2.setChecked(false);
                        holder.checkbox.setChecked(false);
                    } else {

                    }

                    ((Student) holder.checkbox3.getTag()).setSelected(true);

                    // Toast.makeText(context,
                    // holder.text.getText().toString() ,
                    // Toast.LENGTH_SHORT).show();
                    if (((CheckBox) holder.checkbox3).isChecked()) {
                        ViewGroup row1 = (ViewGroup) holder.checkbox3
                                .getParent();

                        // for (int itemPos = 1; itemPos < ((ViewGroup)
                        // row1).getChildCount(); itemPos++) {

                        View view1 = ((ViewGroup) row1).getChildAt(4);
                        if (view1 instanceof TextView) {

                            holder.StudentName = (TextView) view1;
                            // numbers.add(Integer.parseInt(holder.StudentName.getText().toString()));}

                            checkBoxState.add(Integer
                                    .parseInt(holder.StudentName.getText()
                                            .toString()));
                        }
                        // else{
                        // checkBoxState.add(1);}

                    }

                }
            });

    holder.checkbox2
            .setOnCheckedChangeListener(new OnCheckedChangeListener() {

                @Override
                public void onCheckedChanged(CompoundButton buttonView,
                        boolean isChecked) {

                    if (isChecked) {
                        holder.row.setBackgroundResource(R.drawable.blue);
                        holder.checkbox.setChecked(false);
                        holder.checkbox3.setChecked(false);

                    } else {

                    }

                    ((Student) holder.checkbox2.getTag()).setSelected(true);

                    // Toast.makeText(context,
                    // holder.text.getText().toString() ,
                    // Toast.LENGTH_SHORT).show();
                    if (((CheckBox) holder.checkbox2).isChecked()) {
                        ViewGroup row1 = (ViewGroup) holder.checkbox2
                                .getParent();

                        // for (int itemPos = 1; itemPos < ((ViewGroup)
                        // row1).getChildCount(); itemPos++) {

                        View view1 = ((ViewGroup) row1).getChildAt(4);
                        if (view1 instanceof TextView) {

                            holder.StudentName = (TextView) view1;

                            // numbers.add(Integer.parseInt(holder.StudentName.getText().toString()));}
                            checkBoxState.add(Integer
                                    .parseInt(holder.StudentName.getText()
                                            .toString()));
                        }
                        // else{
                        // checkBoxState.add(1);}

                    }

                }
            });

    sumbit.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            for (int i = 0; i < checkBoxState.size(); i++) {

                Toast.makeText(context, checkBoxState.get(i).toString(),
                        Toast.LENGTH_SHORT).show();

                // For webservice propose

                try {

                    SoapObject request = new SoapObject(NAMESPACE,
                            METHOD_NAME);
                    PropertyInfo pi = new PropertyInfo();
                    pi.setName("SID");
                    pi.setValue(Integer.parseInt(checkBoxState.get(i)
                            .toString()));
                    pi.setType(Integer.class);

                    SharedPreferences mPrefs = context
                            .getSharedPreferences("ITeacher", 0);
                    // int str1 = mPrefs.getInt("1",0);
                    int str1 = 1;
                    PropertyInfo pi2 = new PropertyInfo();
                    pi2.setName("TID");
                    pi2.setValue(str1);
                    pi2.setType(Integer.class);

                    PropertyInfo pi3 = new PropertyInfo();
                    pi3.setName("class_id");
                    pi3.setValue(str1);
                    pi3.setType(Integer.class);

                    request.addProperty(pi);
                    request.addProperty(pi2);
                    request.addProperty(pi3);
                    final SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
                            SoapEnvelope.VER11);
                    envelope.setOutputSoapObject(request);
                    final HttpTransportSE androidHttpTransport = new HttpTransportSE(
                            URL);
                    androidHttpTransport.call(SOAP_ACTION, envelope);

                }

                catch (Exception e) {
                }
            }
        }

    });

    return view;

}

Answer 1

如果您知道在开始之前要检查或取消检查的项目，那么只需将其设置为您正在使用的适配器

if (checkBoxState.contains(categories.get(position).categoryid)) {
            holder.checkbox.setChecked(true);
} else {
            holder.checkbox.setChecked(false);
}

然后继续这样的代码

holder.checkbox
                .setOnCheckedChangeListener(new OnCheckedChangeListener() {
                    public void onCheckedChanged(CompoundButton buttonView,
                            boolean isChecked) {
                        if (isChecked) {
                             checkBoxState.add(categories.get(position).categoryid);
                            } else {
                             checkBoxState.remove(categories.get(position).categoryid);
                            }
                        }
                    });