Question

对于我们的手册应用，我们想添加一个搜索功能。我们需要在操作栏中使用SearchView，您可以在其中键入一些文本。然后在ExpandableListView中只应显示条目，它们包含键入的文本。通过单击一个结果，将打开搜索到的PDF文件。

感谢阅读（及答案）。

编辑：以下是一些代码：

private void displayList() {

    loadSomeData();

    //get reference to the ExpandableListView
    myList = (ExpandableListView) findViewById(R.id.expandableList);
    //create the adapter by passing your ArrayList data
    listAdapter = new expSearchAdapter(Search.this, headersList);
    //attach the adapter to the list
    myList.setAdapter(listAdapter);

    myList.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
        @Override
        public boolean onChildClick(ExpandableListView parent, View v, int     groupPosition, int childPosition, long id) {

            **// Here I need to get the name of the clicked result and open the PDF**

            return false;
        }
    });

}

private void loadSomeData() {

    itemList.add(new expRow("Foo"));
    itemList.add(new expRow("Foo2"));
    itemList.add(new expRow("Foo3"));
    headers = new expHeader("Bar", itemList);
    headersList.add(headers);

    itemList = new ArrayList<expRow>();
    itemList.add(new expRow("Foo4"));
    itemList.add(new expRow("Foo5"));
    itemList.add(new expRow("Foo6"));
    headers = new expHeader("Bar2", itemList);
    headersList.add(headers);

    }

这是我的expSearchAdapter.class：

public class expSearchAdapter extends BaseExpandableListAdapter {
private Context context;
private ArrayList<expHeader> HeaderList;
private ArrayList<expHeader> originalList;
public expSearchAdapter(Context context, ArrayList<expHeader> hList) {
        this.context = context;
        this.HeaderList = new ArrayList<expHeader>();
        this.HeaderList.addAll(hList);
        this.originalList = new ArrayList<expHeader>();
        this.originalList.addAll(hList);
}

@Override
public Object getChild(int groupPosition, int childPosition) {
    ArrayList<expRow> countryList = HeaderList.get(groupPosition).getHeaderList();
    return countryList.get(childPosition);
}

@Override
public long getChildId(int groupPosition, int childPosition) {
    return childPosition;
}

@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
                         View view, ViewGroup parent) {

    expRow rowL = (expRow) getChild(groupPosition, childPosition);
    if (view == null) {
        LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = layoutInflater.inflate(R.layout.list_item, null);
    }

    TextView name = (TextView) view.findViewById(R.id.lblListItem);
    name.setText(rowL.getName());

    return view;
}

@Override
public int getChildrenCount(int groupPosition) {

    ArrayList<expRow> countryList = HeaderList.get(groupPosition).getHeaderList();
    return countryList.size();

}

@Override
public Object getGroup(int groupPosition) {
    return HeaderList.get(groupPosition);
}

@Override
public int getGroupCount() {
    return HeaderList.size();
}

@Override
public long getGroupId(int groupPosition) {
    return groupPosition;
}

@Override
public View getGroupView(int groupPosition, boolean isLastChild, View view,
                         ViewGroup parent) {

    expHeader continent = (expHeader) getGroup(groupPosition);
    if (view == null) {
        LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = layoutInflater.inflate(R.layout.list_group, null);
    }

    TextView heading = (TextView) view.findViewById(R.id.lblListHeader);
    heading.setTypeface(null, Typeface.BOLD);
    heading.setText(continent.getName().trim());

    return view;
}

@Override
public boolean hasStableIds() {
    return true;
}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
}

public void filterData(String query, TextView status){

    query = query.toLowerCase();
    Log.v("Adapter", String.valueOf(HeaderList.size()));
    HeaderList.clear();

    if(query.isEmpty()){
        HeaderList.addAll(originalList);
    }
    else {

        for(expHeader headers: originalList){

            ArrayList<expRow> countryList = headers.getHeaderList();
            ArrayList<expRow> newList = new ArrayList<expRow>();
            for(expRow country: countryList){
                if(country.getName().toLowerCase().contains(query) ||
                        country.getName().toLowerCase().contains(query)){
                    newList.add(country);
                }
            }
            if(newList.size() > 0){
                expHeader nContinent = new expHeader(headers.getName(),newList);
                HeaderList.add(nContinent);
            }
        }
    }

    Log.v("expSearchAdapter", String.valueOf(HeaderList.size()));
    if (HeaderList.size() == 0) {
        try {
            status.setText(context.getString(R.string.noResult));
            status.setVisibility(View.VISIBLE);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    notifyDataSetChanged();

}


}

以下是expHeader.class：

import java.util.ArrayList;

public class expHeader {
private String name;
private ArrayList<expRow> headerList = new ArrayList<expRow>();

public expHeader(String name, ArrayList<expRow> countryList) {
    super();
    this.name = name;
    this.headerList = countryList;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public ArrayList<expRow> getHeaderList() {
    return headerList;
}
public void setCountryList(ArrayList<expRow> headerListcontent) {
    this.headerList = headerListcontent;
};
}

以下是expRow.class：

public class expRow {
    private String name = "";

    public expRow(String content) {
        super();
        this.name = content;
    }

    public String getName() {
        return name;
    }
    public void setName(String content) {
        this.name = content;
    }
}

这是我的SearchView：

SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);

search = (SearchView) findViewById(R.id.search);
      search.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
search.setIconifiedByDefault(false);
search.setOnQueryTextListener(this);
search.setOnCloseListener(this);
search.setQueryHint(getString(R.string.search));

//...

@Override
    public boolean onQueryTextChange(String query) {
        if (query.length() < 3) {
            TextView sInfo = (TextView) findViewById(R.id.statusInfo);
            sInfo.setVisibility(View.VISIBLE);
            sInfo.setText(getString(R.string.notEnoughSearchLetters));
            myList.setVisibility(View.GONE);
        } else {
            TextView sInfo = (TextView) findViewById(R.id.statusInfo);
            sInfo.setVisibility(View.GONE);
            myList.setVisibility(View.VISIBLE);
            listAdapter.filterData(query, sInfo);
        }
        expandAll();
        return false;
    }

@Override
public boolean onQueryTextSubmit(String query) {
    if (query.length() < 3) {
        TextView sInfo = (TextView) findViewById(R.id.statusInfo);
        sInfo.setVisibility(View.VISIBLE);
        sInfo.setText(getString(R.string.notEnoughSearchLetters));
        myList.setVisibility(View.GONE);
    } else {
        TextView sInfo = (TextView) findViewById(R.id.statusInfo);
        sInfo.setVisibility(View.GONE);
        myList.setVisibility(View.VISIBLE);
        listAdapter.filterData(query, sInfo);
    }

如何将搜索功能添加到ExpandableListView？

0 个答案: