3

我正在尝试在扩展的自定义适配器上应用过滤器BaseAdapter，在我根据文本过滤输入EditText并检查CheckBox以选择一个值以及如果我删除文本EditText以搜索其他一些值之后，我遇到了一些问题选中复选框的位置会自动更改，如下图所示。我目前面临两个问题

1 - 勾选复选框的位置自动更改

EditText2 - 如果我在ListView空白处输入大写。

public class MyCustomAdapter extends BaseAdapter implements Filterable {

Context mContext;
private LayoutInflater mInflater;
SparseBooleanArray mSparseBooleanArray;
private ArrayList<Map<String,String>> mAdapData = new ArrayList<Map<String, String>>();
private ArrayList<Map<String,String>> mOriginalData = new ArrayList<Map<String, String>>();

public MyCustomAdapter(Context mContext) {
    mInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    mSparseBooleanArray = new SparseBooleanArray();
}

public ArrayList<String> getCheckedItems() {
    ArrayList<String> mTempArry = new ArrayList<String>();
    for (int i = 0; i < mAdapData.size(); i++) {
        if (mSparseBooleanArray.get(i)) {
            Map<String, String> map = (Map<String, String>) mAdapData.get(i);
            final String numbr = map.get("Phone").toString();
            mTempArry.add(numbr);
        }
    }
    return mTempArry;
}

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

public void addItem(String paramString1, String paramString2) {
    Map<String, String> NameNumber = new HashMap<String, String>();
    NameNumber.put("Name", paramString1);
    NameNumber.put("Phone", paramString2);
    this.mAdapData.add(NameNumber);
    this.mOriginalData.add(NameNumber);
    notifyDataSetChanged();
}

@SuppressWarnings("unchecked")
public Object getItem(int paramInt) {
    return (ArrayList<Map<String, String>>) this.mAdapData.get(paramInt);
}

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

@Override
public View getView(final int paramInt, View paramView, ViewGroup paramViewGroup) {

    ViewHolder viewHolder;

    if (paramView == null) {
        viewHolder = new ViewHolder();
        paramView = mInflater.inflate(R.layout.multiplecontactview, null);
        viewHolder.tvName = (TextView) paramView.findViewById(R.id.txtContactName);
        viewHolder.tvNumber = (TextView) paramView.findViewById(R.id.txtContactNumber);
        viewHolder.cb = (CheckBox) paramView.findViewById(R.id.checkBox1);
        viewHolder.cb.setTag(paramInt);
        viewHolder.cb.setChecked(mSparseBooleanArray.get(paramInt));
        viewHolder.cb.setOnCheckedChangeListener(mCheckedChangeListener);
        viewHolder.tvName.setTextColor(Color.BLACK);
        viewHolder.tvNumber.setTextColor(Color.BLACK);
        for (int i = 0; i < mAdapData.size(); i++) {
            Map<String, String> map = (Map<String, String>) mAdapData.get(paramInt);
            final String name = map.get("Name").toString();
            final String numbr = map.get("Phone").toString();
            viewHolder.tvName.setText(name);
            viewHolder.tvNumber.setText(numbr);
        }
        paramView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolder) paramView.getTag();
    }       
    return paramView;
}

OnCheckedChangeListener mCheckedChangeListener = new OnCheckedChangeListener() {
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        mSparseBooleanArray.put((Integer) buttonView.getTag(), isChecked);
    }
};

public static class ViewHolder {
    TextView tvName;
    TextView tvNumber;
    CheckBox cb;
}

@Override
public Filter getFilter() {
    return new MyContactFilter();
}

@SuppressLint("DefaultLocale")
private class MyContactFilter extends Filter {

    @Override
    protected FilterResults performFiltering(CharSequence constraint) {
        FilterResults results = new FilterResults();
        ArrayList<Map<String, String>> mFilteredData = new ArrayList<Map<String, String>>();

        if (!TextUtils.isEmpty(constraint)) { 
            for(int i = 0; i < mAdapData.size(); i++) {
                Map<String, String> map = (Map<String, String>) mAdapData.get(i);
                final String names = map.get("Name").toString();
                final String numbr = map.get("Phone").toString();
                if(names.toLowerCase().contains(constraint.toString().toLowerCase())) {
                    Map<String, String> FilNameNumber = new HashMap<String, String>();
                    FilNameNumber.put("Name", names);
                    FilNameNumber.put("Phone", numbr);
                    mFilteredData.add(FilNameNumber);
                }
            }
            results.values = mFilteredData;
            results.count = mFilteredData.size();

        } else {
            synchronized (mOriginalData) {
                results.values = mOriginalData;
                results.count = mOriginalData.size();
            }
        }
        return results;
    }

    @SuppressWarnings("unchecked")
    @Override
    protected void publishResults(CharSequence cs, FilterResults fr) {
        mAdapData = (ArrayList<Map<String, String>>) fr.values;
        notifyDataSetChanged();
    }
}
}

截屏

4

2 回答 2

3

摆脱复杂的映射来跟踪属性，将数据存储在这样的类中，以及检查状态：

public class Data {
 private final String text;
 private boolean checked;

 public Data(String text){
   this.text = text;
   this.checked = false;
 }

 public void setChecked(boolean b){
   this.checked = b;
 }

 public boolean isChecked(){
   return this.checked;
 }

 public String getText(){
   return this.text;
 }
}

里面getView()，根据数据状态设置复选框，添加监听器修改数据状态：

final Data data = getItem(position);

cb.setOnCheckedChangeListener(null); //important 
cb.setChecked(data.isChecked());
cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        data.setChecked(isChecked);
    }
});

关于过滤：

names.toLowerCase().contains(cs)

Contains在char 值上进行区分大小写的匹配。尝试names.toLowerCase().contains(cs.toLowerCase())

于 2012-12-22T09:17:36.230 回答
1

如果您更仔细地查看您的代码，特别是在 上getView()，您会发现您ViewHolder每次都在独立于convertView存在的情况下创建对象。

这是错误使用ViewHolder模式。与其每次都创建，不如只在convertView为 null 时创建，并将其设置为convertViewby的标记setTag()，否则获取ViewHolderusing的引用getTag()。像这样：

 ViewHolder viewHolder;

    if (paramView == null) {
        paramView = mInflater.inflate(R.layout.multiplecontactview, null);
        viewHolder = new ViewHolder();
        viewHolder.tvName = (TextView) paramView.findViewById(R.id.txtContactName);
        viewHolder.tvNumber = (TextView) paramView.findViewById(R.id.txtContactNumber);
        viewHolder.cb = (CheckBox) paramView.findViewById(R.id.checkBox1);
        paramView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolder) paramView.getTag();
    }

    viewHolder.cb.setTag(paramInt);
    viewHolder.cb.setChecked(mSparseBooleanArray.get(paramInt));
    viewHolder.cb.setOnCheckedChangeListener(mCheckedChangeListener);
    viewHolder.tvName.setTextColor(Color.BLACK);
    viewHolder.tvNumber.setTextColor(Color.BLACK);
    for (int i = 0; i < mAdapData.size(); i++) {
        Map<String, String> map = (Map<String, String>) mAdapData.get(paramInt);
        final String name = map.get("Name").toString();
        final String numbr = map.get("Phone").toString();
        viewHolder.tvName.setText(name);
        viewHolder.tvNumber.setText(numbr);
    }
    return paramView;

同样在您preformFiltering()尝试更改此代码段时：

if (names.toLowerCase().contains(cs))

至

if (names.toLowerCase().contains(cs.toString().toLowerCase()))

更新

有一段奇怪的代码：

OnCheckedChangeListener mCheckedChangeListener = new OnCheckedChangeListener() {
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        mSparseBooleanArray.put((Integer) buttonView.getTag(), isChecked);
    }
};

这意味着如果您第一次检查列表中第 0 位的列表项，则SparseArray表示第一项ListView应该始终有一个复选框，因为您没有在代码中的任何地方取消选中它，不要' t 将该值设置为 false，但仅在用户手动取消选中该复选框时才这样做。

于 2012-12-22T09:16:12.633 回答