Question

我会在每个列表中创建包含复选框和textview的列表视图。我面临的问题是，我无法从适配器类中检索已检查和未检查值的数组。我在这里附上了某种代码。这是我的Adapter类

public class MyFacilityAdapter<T> extends BaseAdapter {

    ArrayList<T> mFList;
    LayoutInflater mInflate;
    SparseBooleanArray mySaprseBooleanArray;
    ArrayList<Integer> items = new ArrayList<Integer>();

    public MyFacilityAdapter(Context mContext, ArrayList<T> facilityList) {
        // TODO Auto-generated constructor stub
        mInflate = LayoutInflater.from(mContext);

        mySaprseBooleanArray = new SparseBooleanArray();

        mFList = new ArrayList<T>();
        this.mFList = facilityList;
    }

    /*public ArrayList<T> getCheckeditems() {

        ArrayList<T> tempArray = new ArrayList<T>();

        for (int i = 0; i < mFList.size(); i++) {
            if (mySaprseBooleanArray.get(i)) {
                tempArray.add(mFList.get(i));
            }
        }

        return tempArray;
    }*/
    ArrayList<Integer> getAdapterItems() {
        return items;
    }

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

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

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

    @Override
    public View getView(int postion, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub

        if (convertView == null) {
            convertView = mInflate.inflate(R.layout.row_facility, null);
        }

        TextView tvFName = (TextView) convertView
                .findViewById(R.id.tv_facilityName);
        tvFName.setText(mFList.get(postion).toString());
        CheckBox chkBox = (CheckBox) convertView.findViewById(R.id.chkBox);
        chkBox.setTag(postion);
        /*chkBox.setChecked(mySaprseBooleanArray.get(postion));*/
        chkBox.setOnCheckedChangeListener(mChkChangedListener);

        return convertView;
    }

    OnCheckedChangeListener mChkChangedListener = new OnCheckedChangeListener() {

        @Override
        public void onCheckedChanged(CompoundButton buttonView,
                boolean isChecked) {
            CheckBox chk = (CheckBox) buttonView;
            // TODO Auto-generated method stub
            if (chk.isChecked()) {
                items.set(chk.getTag(), 1);
            } else {
                items.set(chk.getTag(), 0);
            }
            /*mySaprseBooleanArray.put((Integer) buttonView.getTag(), isChecked);*/
        }
    };

}

我将代码修改为[item.set（chk.getTag（），1）]。但是一旦我选中了复选框，就会触发Indexoutofbounds异常。我附在这里logcat。

04-02 01:21:53.002: E/AndroidRuntime(1019): FATAL EXCEPTION: main
04-02 01:21:53.002: E/AndroidRuntime(1019): Process: com.example.homeyapp, PID: 1019
04-02 01:21:53.002: E/AndroidRuntime(1019): java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
04-02 01:21:53.002: E/AndroidRuntime(1019):     at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
04-02 01:21:53.002: E/AndroidRuntime(1019):     at java.util.ArrayList.set(ArrayList.java:481)
04-02 01:21:53.002: E/AndroidRuntime(1019):     at com.example.homeyapp.MyFacilityAdapter$1.onCheckedChanged(MyFacilityAdapter.java:95)
04-02 01:21:53.002: E/AndroidRuntime(1019):     at android.widget.CompoundButton.setChecked(CompoundButton.java:127)
04-02 01:21:53.002: E/AndroidRuntime(1019):     at android.widget.CompoundButton.toggle(CompoundButton.java:87)

Answer 1

想出来。首先将整数1或0放入SparseBoolean数组中，如：

if (chk.isChecked()) {
                mySaprseBooleanArray.put((Integer) chk.getTag(), isChecked);
            } else {
                mySaprseBooleanArray.put((Integer) chk.getTag(), isChecked);
            }

然后，为了获得已检查和未选中的项目数组：

public ArrayList<Integer> getCheckeditems() {

        ArrayList<Integer> items = new ArrayList<Integer>();
        for (int i = 0; i < mFList.size(); i++) {
            Boolean temp = mySaprseBooleanArray.get(i);
            if (temp) {
                items.add(1);
            } else {
                items.add(0);
            }
        }

        return items;
    }

这里的物品返回100101010; 1表示已选中，0表示未选中。

Answer 2

＆＃39;＆＃39;＆＃39; ArrayList需要使用与列表中的行数相同的元素预先填充。（现在，每次用户检查或取消选中任何行时，您都会将 new 整数元素附加到ArrayList - 这没有任何意义。）

如果您执行上述操作，则onCheckChanged（）可能如下所示：

    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        CheckBox chk = (CheckBox) buttonView;
        if (chk.isChecked()) {
            items.set(chk.getTag(), 1);
        } else {
            items.set(chk.getTag(), 0);
        }
        /*mySaprseBooleanArray.put((Integer) buttonView.getTag(), isChecked);*/
    }

获取适配器中已选中和未选中状态的复选框的数组

2 个答案: