26

如何构建一个搜索栏,在我输入时结果显示在ListView我正在搜索的位置中?

例如,我有一个包含 20 个字符串的列表视图。我按下搜索键并出现栏。我希望当我输入 3 个或更多单词时,搜索开始运行,在列表视图中显示结果(作为过滤器:仅显示列表中与我输入的内容匹配的字符串)

4

5 回答 5

20

我相信这就是您正在寻找的:

http://www.java2s.com/Code/Android/2D-Graphics/ShowsalistthatcanbefilteredinplacewithaSearchViewinnoniconifiedmode.htm

让您的 Activity 实现 SearchView.OnQueryTextListener

并添加以下方法:

public boolean onQueryTextChange(String newText) {
    if (TextUtils.isEmpty(newText)) {
        mListView.clearTextFilter();
    } else {
        mListView.setFilterText(newText.toString());
    }
    return true;
}

public boolean onQueryTextSubmit(String query) {
    return false;
}
于 2012-11-11T18:30:35.220 回答
14

您无法使用搜索栏执行此操作。但是列表视图有可能在按键上进行过滤,就像在联系人中一样。用户只需开始输入,然后列表就会被过滤。过滤并不像搜索。如果您的列表在某处包含单词 foo 并且您键入 oo foo 将被过滤掉,但如果您键入 fo 即使列表项调用 bar foo 也会保留。

您只需启用它:

ListView lv = getListView();
lv.setTextFilterEnabled(true);

如果您没有硬件键盘,我不知道如何做到这一点。我正在使用机器人并开始键入启动列表以过滤并仅显示匹配的结果。

于 2010-03-04T08:59:25.113 回答
10

我曾经EditText做过这项工作。

首先,我创建了两个数组副本来保存要搜索的数据列表:

List<Map<String,String>> vehicleinfo;
List<Map<String,String>> vehicleinfodisplay;

从某处获得列表数据后,我将其复制:

for(Map<String,String>map : vehicleinfo)
{
    vehicleinfodisplay.add(map);
}

并使用 aSimpleAdapter显示我的数据的显示(复制)版本:

String[] from={"vehicle","dateon","dateoff","reg"};
int[] to={R.id.vehicle,R.id.vehicledateon,R.id.vehicledateoff,R.id.vehiclereg};
listadapter=new SimpleAdapter(c,vehicleinfodisplay,R.layout.vehiclelistrow,from,to);
vehiclelist.setAdapter(listadapter);

然后我通过清除列表的显示版本然后只添加来自另一个列表中满足搜索条件的项目(在这种情况下,“reg”字段包含搜索字符串)来添加一个响应事件TextWatcherEditText事件。afterTextChanged一旦显示列表填充了过滤列表,我只需调用notifyDataSetChanged列表的SimpleAdapter.

searchbox.addTextChangedListener(new TextWatcher()
{
    @Override
    public void afterTextChanged(Editable s)
    {
        vehicleinfodisplay.clear();
        String search=s.toString();
        for(Map<String,String>map : vehicleinfo)
        {
            if(map.get("reg").toLowerCase().contains(search.toLowerCase()))
                vehicleinfodisplay.add(map);
            listadapter.notifyDataSetChanged();
        }
    };
    ... other overridden methods can go here ...
});

希望这对某人有帮助。

于 2012-04-11T14:21:24.317 回答
5

使用以下代码在android中实现搜索和过滤列表:

SearchAndFilterList.java

public class SearchAndFilterList extends Activity {

    private ListView mSearchNFilterLv;

    private EditText mSearchEdt;

    private ArrayList<String> mStringList;

    private ValueAdapter valueAdapter;

    private TextWatcher mSearchTw;

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_search_and_filter_list);

        initUI();

        initData();

        valueAdapter=new ValueAdapter(mStringList,this);

        mSearchNFilterLv.setAdapter(valueAdapter);

        mSearchEdt.addTextChangedListener(mSearchTw);


    }
    private void initData() {

        mStringList=new ArrayList<String>();

        mStringList.add("one");

        mStringList.add("two");

        mStringList.add("three");

        mStringList.add("four");

        mStringList.add("five");

        mStringList.add("six");

        mStringList.add("seven");

        mStringList.add("eight");

        mStringList.add("nine");

        mStringList.add("ten");

        mStringList.add("eleven");

        mStringList.add("twelve");

        mStringList.add("thirteen");

        mStringList.add("fourteen");

        mSearchTw=new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

                valueAdapter.getFilter().filter(s);
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {

            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        };

    }

    private void initUI() {

        mSearchNFilterLv=(ListView) findViewById(R.id.list_view);

        mSearchEdt=(EditText) findViewById(R.id.txt_search);
    }

}

自定义值适配器: ValueAdapter.java

public class ValueAdapter extends BaseAdapter implements Filterable{

    private ArrayList<String> mStringList;

    private ArrayList<String> mStringFilterList;

    private LayoutInflater mInflater;

    private ValueFilter valueFilter;

    public ValueAdapter(ArrayList<String> mStringList,Context context) {

        this.mStringList=mStringList;

        this.mStringFilterList=mStringList;

        mInflater=LayoutInflater.from(context);

        getFilter();
    }

    //How many items are in the data set represented by this Adapter.
    @Override
    public int getCount() {

        return mStringList.size();
    }

    //Get the data item associated with the specified position in the data set.
    @Override
    public Object getItem(int position) {

        return mStringList.get(position);
    }

    //Get the row id associated with the specified position in the list.
    @Override
    public long getItemId(int position) {

        return position;
    }

    //Get a View that displays the data at the specified position in the data set.
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        Holder viewHolder;

        if(convertView==null) {

            viewHolder=new Holder();

            convertView=mInflater.inflate(R.layout.list_item,null);

            viewHolder.nameTv=(TextView)convertView.findViewById(R.id.txt_listitem);

            convertView.setTag(viewHolder);

        }else{

            viewHolder=(Holder)convertView.getTag();
        }

            viewHolder.nameTv.setText(mStringList.get(position).toString());

            return convertView;
    }

    private class  Holder{

        TextView nameTv;
    }

    //Returns a filter that can be used to constrain data with a filtering pattern.
    @Override
    public Filter getFilter() {

        if(valueFilter==null) {

            valueFilter=new ValueFilter();
        }

        return valueFilter;
    }


    private class ValueFilter extends Filter {


        //Invoked in a worker thread to filter the data according to the constraint.
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {

            FilterResults results=new FilterResults();

            if(constraint!=null && constraint.length()>0){

                ArrayList<String> filterList=new ArrayList<String>();

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

                    if(mStringFilterList.get(i).contains(constraint)) {

                        filterList.add(mStringFilterList.get(i));

                    }
                }


                results.count=filterList.size();

                results.values=filterList;

            }else{

                results.count=mStringFilterList.size();

                results.values=mStringFilterList;

            }

            return results;
        }


        //Invoked in the UI thread to publish the filtering results in the user interface.
        @SuppressWarnings("unchecked")
        @Override
        protected void publishResults(CharSequence constraint,
                FilterResults results) {

            mStringList=(ArrayList<String>) results.values;

            notifyDataSetChanged();


        }

    }

}

activity_search_and_filter_list.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <EditText
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/txt_search"
        tools:context=".SearchAndFilterList"
        android:hint="Enter text to search" />
    <ListView 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/list_view"
        android:layout_below="@+id/txt_search"></ListView>

</RelativeLayout>

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
    <TextView 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/txt_listitem"/>

</RelativeLayout>

AndroidManifext.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.searchandfilterlistview"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".SearchAndFilterList"
            android:label="@string/title_activity_search_and_filter_list" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

我希望这段代码将有助于实现自定义搜索和过滤列表视图

于 2012-11-22T14:21:50.460 回答
1

最好的方法是通过在可搜索的活动中覆盖 onSearchRequested 来使用内置的搜索栏或 SearchManager。您可以设置要搜索的数据源以获取自动下拉的结果,或者您可以只接受用户的输入并进行搜索。这是SearchManager的一个很好的概述是一个 Plus 在 API Demos 项目com.example.android.apis.app.SearchQueryResult中有一个工作演示

@Override
public boolean onSearchRequested() {
于 2010-03-03T23:23:51.800 回答