如何在我的应用中添加搜索功能？

Question

我的应用程序中有一个动态列表视图。我想在其中添加搜索功能，以便当我在搜索栏中输入单词时，我的列表视图将仅显示与我输入的单词匹配的单词。任何想法和帮助将受到高度赞赏。

这是我的活动：

public class Artists extends ListActivity {



private static String url = "http://api.androidhive.info/contacts/";

// JSON Node names
private static final String TAG_CONTACTS = "contacts";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_GENDER = "gender";
private static final String TAG_PHONE = "phone";
private static final String TAG_PHONE_MOBILE = "mobile";
private static final String TAG_PHONE_HOME = "home";
private static final String TAG_PHONE_OFFICE = "office";

// contacts JSONArray
JSONArray contacts = null;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.artists);

    // Hashmap for ListView
            ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();

            // Creating JSON Parser instance
            JSONParser jParser = new JSONParser();

            // getting JSON string from URL
            JSONObject json = jParser.getJSONFromUrl(url);

            try {
                // Getting Array of Contacts
                contacts = json.getJSONArray(TAG_CONTACTS);

                // looping through All Contacts
                for(int i = 0; i < contacts.length(); i++){
                    JSONObject c = contacts.getJSONObject(i);

                    // Storing each json item in variable
                    String id = c.getString(TAG_ID);
                    String name = c.getString(TAG_NAME);
                    String email = c.getString(TAG_EMAIL);
                    String address = c.getString(TAG_ADDRESS);
                    String gender = c.getString(TAG_GENDER);

                    // Phone number is agin JSON Object
                    JSONObject phone = c.getJSONObject(TAG_PHONE);
                    String mobile = phone.getString(TAG_PHONE_MOBILE);
                    String home = phone.getString(TAG_PHONE_HOME);
                    String office = phone.getString(TAG_PHONE_OFFICE);

                    // creating new HashMap
                    HashMap<String, String> map = new HashMap<String, String>();

                    // adding each child node to HashMap key => value
                    map.put(TAG_ID, id);
                    map.put(TAG_NAME, name);
                    map.put(TAG_EMAIL, email);
                    map.put(TAG_PHONE_MOBILE, mobile);

                    // adding HashList to ArrayList
                    contactList.add(map);
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }

            /**
             * Updating parsed JSON data into ListView
             * */
            ListAdapter adapter = new SimpleAdapter(this, contactList,
                    R.layout.row_artists,
                    new String[] { TAG_NAME }, new int[] {
                            R.id.tv_row_artists });

            setListAdapter(adapter);
            // selecting single ListView item
            ListView lv = getListView();
        //  ListView lv = (ListView) findViewById(R.id.lv_chart_listview);

            // Launching new screen on Selecting Single ListItem
            lv.setOnItemClickListener(new OnItemClickListener() {

                @Override
                public void onItemClick(AdapterView<?> parent, View view,
                        int position, long id) {
                    // getting values from selected ListItem

                }
            });

    ll_artists_chart = (LinearLayout) findViewById(R.id.ll_artists_chart);
    ll_artists_newrelease = (LinearLayout) findViewById(R.id.ll_artists_newrelease);

    ll_artists_chart.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent intent = new Intent(getBaseContext(), MainActivity.class);
            startActivity(intent);
            finish();
        }
    });

    ll_artists_newrelease.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent intent = new Intent(getBaseContext(), NewReleases.class);
            startActivity(intent);
            finish();
        }
    });
}

}

这是我的Xml文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<LinearLayout
        android:id="@+id/ll_artists_topheader"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/top_bar1"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/tv_artists_triplevmusic"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:text="TripleVMusic"
            android:textColor="#ffffff"
            android:textSize="15dp" />

        </LinearLayout>

<LinearLayout
    android:id="@+id/ll_artists_header"
     android:layout_width="match_parent"
    android:layout_height="90dip"
    android:layout_marginTop="0dp"
    android:orientation="horizontal"
    android:weightSum="3" >

    <LinearLayout
        android:id="@+id/ll_artists_chart"
       android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/chart_unselected"
        android:layout_weight="1"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/tv_artists_chart"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="35dp"
            android:layout_marginTop="65dp"
            android:text="Chart"
            android:textColor="#ffffff"
            android:textSize="15dp" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/ll_artists_newrelease"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/newrelease_unselected"
        android:layout_weight="1"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/tv_artists_newrelease"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="65dp"
            android:text="New Releases"
            android:textColor="#ffffff"
            android:textSize="15dp" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/ll_artists_artists"
         android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/artists_selected"
        android:layout_weight="1"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/tv_artists_artists"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="30dp"
            android:layout_marginTop="65dp"
            android:text="Artists"
            android:textColor="#ffffff"
            android:textSize="15dp" />
    </LinearLayout>
</LinearLayout>

<LinearLayout
    android:id="@+id/ll_artists_menuvotes_newrelease"
    android:layout_width="match_parent"
    android:layout_height="75dp"
    android:layout_below="@+id/ll_artists_header"
    android:background="@drawable/vote_bar"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/tv_artists_menuvotes_newrelease"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="5dp"
        android:text="Votes from xx-xx-xxx to xx-xx-xxx"
        android:textColor="#ffffff" />

    <EditText
        android:id="@+id/et_artists_searchWord"
        android:layout_width="fill_parent"
        android:layout_height="40dip"
        android:layout_alignParentTop="true"
        android:layout_centerVertical="true"
        android:layout_marginLeft="7dip"
        android:layout_marginRight="7dip"
        android:layout_marginTop="8dip"
        android:ems="10"
        android:hint="Enter Word To Search"
        android:background="@drawable/et_bar" >

        <requestFocus />
    </EditText>
</LinearLayout>

<RelativeLayout
    android:id="@+id/rl_artists_listview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_below="@+id/ll_artists_menuvotes_newrelease" >

    <ListView
        android:id="@android:id/list"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </ListView>
    <!-- <ListView
        android:id="@+id/lv_artists_listview"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </ListView> -->
</RelativeLayout>

Answer 1

创建一个这样的自定义过滤器：

public static List<YourObject> filter(String string,
        Iterable<YourObject> iterable, boolean byName) {
    if (iterable == null)
        return new LinkedList<YourObject>();
    else {
        List<YourObject> collected = new LinkedList<YourObject>();
        Iterator<YourObject> iterator = iterable.iterator();
        if (iterator == null)
            return collected;
        while (iterator.hasNext()) {
            YourObject item = iterator.next();
            collected.add(item);
        }
        return collected;
    }
}

并将其称为addTextChangeListener

的EditText

List<YourObject> list = filter(s.toString(),alproductInfoDTO, true);
contactList.addAll(list);

然后再次致电setAdapter。