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Android SearchView 搜索框
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背景: 天氣預報app, 本地數據庫存儲70個大中城市的基本信息, 根據用戶輸入的或通過搜索框選取的城市, 點擊查詢按鈕后, 異步請求國家氣象局數據, 得到返回的json解析并顯示.
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1. 先說AndroidManifest.xml文件
<uses-sdk?????android:minSdkVersion="11"?????android:targetSdkVersion="16"?/>??<application>?????<activity?????????android:name="com.lichen.weather.WeatherActivity"?????????android:launchMode="singleTop"?????????android:label="@string/app_name"?>?????????<intent-filter>??????????????????????</intent-filter>??????????<!-- 關注1 -->?????????????????<intent-filter>?????????????<action?android:name="android.intent.action.SEARCH"?/>??????????????????????</intent-filter>???????????????????<meta-data?android:name="android.app.searchable"????????????????????android:resource="@xml/searchable"?/>?<!-- /關注1 -->?????????????</activity>?????<provider?android:name="com.lichen.db.CityContentProvider"?????????android:authorities="com.lichen.cityprovider"?????????android:label="@string/app_name"></provider>??????<!-- 關注2 -->?????????<meta-data?android:name="android.app.default_searchable"????????????????android:value="com.lichen.weather.WeatherActivity"?/>?<!-- /關注2 -->?????</application>?2. menu菜單里面加入
<menu?xmlns:android="http://schemas.android.com/apk/res/android"?>??????<item?android:id="@+id/search"???????????android:title="@string/menu_search"???????????android:showAsAction="collapseActionView|ifRoom"???????????android:actionViewClass="android.widget.SearchView"?/>??</menu>?3. 然后在res目錄下新建xml/searchable.xml
<?xml?version="1.0"?encoding="utf-8"?>? <searchable?xmlns:android="http://schemas.android.com/apk/res/android"?????????android:label="@string/search_label"?????????android:hint="@string/search_hint"?????????android:searchSuggestAuthority="com.lichen.cityprovider"?????????android:searchSuggestIntentAction="android.intent.action.VIEW"?????????android:searchSuggestIntentData="content://com.lichen.cityprovider/city"?????????android:searchSuggestSelection="??"?????????android:searchSuggestThreshold="1"??????????android:includeInGlobalSearch="true">??</searchable>?字符串盡量使用@string/search_label這種方式.
4. Activity中
因為注冊Activity的啟動方式為android:launchMode="singleTop",需要Activity的protected?void?onNewIntent(Intent?intent)?{}來交互.
@Override?protected?void?onNewIntent(Intent?intent)?{?????handleIntent(intent);?}??private?void?handleIntent(Intent?intent)?{????????if?(Intent.ACTION_VIEW.equals(intent.getAction()))?{????????????????????????Cursor?searchCursor?=?getContentResolver().query(intent.getData(),?null,?null,?null,?null);????????????if?(searchCursor?!=?null?&&?searchCursor.moveToFirst())?{?????????????cityInput.setText(searchCursor.getString(searchCursor.getColumnIndex(City.CITY_DESCRIBE)));?????????}????}??@Override?public?boolean?onCreateOptionsMenu(Menu?menu)?{?????getMenuInflater().inflate(R.menu.activity_weather,?menu);??????????SearchManager?searchManager?=?(SearchManager)?getSystemService(Context.SEARCH_SERVICE);?????SearchView?searchView?=?(SearchView)?menu.findItem(R.id.search).getActionView();?????searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));?????searchView.setIconifiedByDefault(false);?????return?true;?}?以上的在網上可以搜索到,接下來是重點...
5. 需要數據庫支持
public?class?CityDatabaseHelper?extends?SQLiteOpenHelper?{??????protected?static?final?String?DATABASE_NAME?=?"city.db";?????protected?static?final?int?DATABASE_VERSION?=?6;?????public??String[]?columns?=?new?String[]?{?????????????SearchManager.SUGGEST_COLUMN_TEXT_1,?????????????SearchManager.SUGGEST_COLUMN_TEXT_2,?????????????SearchManager.SUGGEST_COLUMN_ICON_1,?????????????SearchManager.SUGGEST_COLUMN_ICON_2,?????????????BaseColumns._ID,?????????????SearchManager.SUGGEST_COLUMN_INTENT_DATA_ID};???????????private?static?final?HashMap<String,String>?mColumnMap?=?buildColumnMap();??????????public?CityDatabaseHelper(Context?context)?{?????????super(context,?DATABASE_NAME,?null,?DATABASE_VERSION);?????}??????private?static?HashMap<String,String>?buildColumnMap()?{?????????HashMap<String,String>?map?=?new?HashMap<String,String>();?????????map.put(SearchManager.SUGGEST_COLUMN_TEXT_1,?City.CITY_DESCRIBE?+?"?as?"+SearchManager.SUGGEST_COLUMN_TEXT_1);?????????map.put(SearchManager.SUGGEST_COLUMN_TEXT_2,?City.CITY_NICKNAME?+?"?as?"+SearchManager.SUGGEST_COLUMN_TEXT_2);?????????map.put(SearchManager.SUGGEST_COLUMN_ICON_1,?City.CITY_IMG?+?"?as?"+SearchManager.SUGGEST_COLUMN_ICON_1);?????????map.put(SearchManager.SUGGEST_COLUMN_ICON_2,?City.CITY_IMG_2?+?"?as?"+SearchManager.SUGGEST_COLUMN_ICON_2);?????????map.put(BaseColumns._ID,?"rowid?AS?"?+?BaseColumns._ID);?????????map.put(SearchManager.SUGGEST_COLUMN_INTENT_DATA_ID,?"rowid?AS?"?+?SearchManager.SUGGEST_COLUMN_INTENT_DATA_ID);?????????return?map;?????}??????????@Override?????public?void?onCreate(SQLiteDatabase?db)?{?????????db.execSQL("create?table?"?????????????????+?City.TABLE_NAME?????????????????+?"(_id?integer?primary?key?autoincrement,?city_id?integer,?city_name?text,?city_nickname?text,?city_describe?text,?city_img?text,?city_img_2?text)");?????}??????@Override?????public?void?onUpgrade(SQLiteDatabase?db,?int?oldVersion,?int?newVersion)?{?????????db.execSQL("drop?table?if?exists?"?+?City.TABLE_NAME);?????????onCreate(db);?????}????????????public?Cursor?search(String?keyWord){?????????SQLiteQueryBuilder?builder=new?SQLiteQueryBuilder();?????????builder.setTables(City.TABLE_NAME);?????????builder.setProjectionMap(mColumnMap);????????????SQLiteDatabase?db=getReadableDatabase();??????????????????return?builder.query(db,?columns,?City.CITY_NAME?+?"?like???"?+?"?or?"?+?City.CITY_NICKNAME?+"?like???",?new?String[]{"%"+keyWord+"%",?"%"+keyWord+"%"},?null,?null,null);?????}?}?6. 完成searchable.xml里面注冊的ContentProvider
public?class?CityContentProvider?extends?ContentProvider?{??????public?static?final?String?AUTHORITY?=?"com.lichen.cityprovider";??????????private?SQLiteDatabase?db;?????private?CityDatabaseHelper?dbHelper;??????????private?static?final?int?QUERY_NORMAL=?1;?????private?static?final?int?QUERY_BY_ID=?2;?????private??static?final??int?QUERY_SEARCH_CITY_NAME=?3;??????????public?static?UriMatcher?uriMatcher;?????static{?????????uriMatcher=new?UriMatcher(UriMatcher.NO_MATCH);??????????????????uriMatcher.addURI(AUTHORITY,"city",?QUERY_NORMAL);?????????uriMatcher.addURI(AUTHORITY,"city/#",?QUERY_BY_ID);??????????????????uriMatcher.addURI(AUTHORITY,SearchManager.SUGGEST_URI_PATH_QUERY,?QUERY_SEARCH_CITY_NAME);?????????uriMatcher.addURI(AUTHORITY,SearchManager.SUGGEST_URI_PATH_QUERY?+?"/*",?QUERY_SEARCH_CITY_NAME);?????}??????????@Override?????public?boolean?onCreate()?{?????????dbHelper?=?new?CityDatabaseHelper(getContext());?????????return?dbHelper?!=?null;?????}??????@Override?????public?Cursor?query(Uri?uri,?String[]?projection,?String?selection,?????????????String[]?selectionArgs,?String?sortOrder)?{?????????db?=?dbHelper.getReadableDatabase();?????????switch?(uriMatcher.match(uri))?{?????????case?QUERY_SEARCH_CITY_NAME:?????????????return?dbHelper.search(selectionArgs[0]);?????????default:?????????????throw?new?IllegalArgumentException("Unknown?Uri:?"?+?uri);?????????}?????}?}?like模糊查詢對于大數據量效果可想而知,FTS3的支持還未嘗試,詳情參考Android SDK里面的Samples/SearchableDictionary
本文轉自chainli 51CTO博客，原文鏈接：http://blog.51cto.com/lichen/1192652，如需轉載請自行聯系原作者
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