這篇文章主要介紹安卓開發中常用的搜索框控件的使用。

為第三方控件，需要添加依賴如下。

'com.quinny898.library.persistentsearch:library:1.1.0-SNAPSHOT'

同時因為gradle默認倉庫為jcenter，所以build一定會報錯。需要在另一個gradle腳本添加倉庫。（不是App的而是Project的build.gradle）

1.布局使用

只要在主布局中添加該空間即可。

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:background="#ffffff"tools:context="com.zc.test.MainActivity"android:orientation="vertical"><com.quinny898.library.persistentsearch.SearchBoxandroid:layout_width="wrap_content"android:id="@+id/searchbox"android:layout_height="wrap_content"/><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="vertical"><ListViewandroid:id="@+id/lv_history"android:layout_marginLeft="20dp"android:layout_marginRight="20dp"android:layout_marginBottom="5dp"android:layout_width="match_parent"android:layout_height="wrap_content"></ListView></LinearLayout><ListViewandroid:id="@+id/lv_content"android:layout_marginLeft="20dp"android:layout_marginRight="20dp"android:layout_width="match_parent"android:layout_height="wrap_content"></ListView><TextViewandroid:id="@+id/tv_bottom"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginTop="10dp"android:gravity="center_horizontal"/> </LinearLayout>

2.代碼實現

package com.zc.test;/*** Created by 16957 on 2018/11/18.*/import android.content.Context; import android.content.SharedPreferences; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.KeyEvent; import android.view.View; import android.widget.AdapterView; import android.widget.ListView; import android.widget.TextView;import com.quinny898.library.persistentsearch.SearchBox; import com.quinny898.library.persistentsearch.SearchResult;import java.util.ArrayList; import java.util.List;public class MainActivity extends AppCompatActivity {//上下文private Context mContext;//搜索框控件，可以自定義styleprivate SearchBox sbSearch;//底部結果統計控件private TextView tvBottom;//數據列表private List<String> listSearch;//結果列表private List<String> listResult;//歷史列表控件private ListView mHistory ;//搜索結果列表控件private ListView mSearchResult ;//底部結果控件private TextView bottom;//兩個繼承BaseAdapter的適配器,搜索歷史sf本地保存private SearchAdapter mResultAdapter ;private HistoryAdapter mHistoryAdapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mContext = this;bindViews();}@Overrideprotected void onResume() {super.onResume();initData();init();initHistory();updateBottom();}private void initData() {//本地可供檢索數據獲取,每次resume就要重新渲染listSearch = new ArrayList<>();listSearch.add("123");listSearch.add("1234");listSearch.add("12345");}private void bindViews() {mSearchResult = (ListView) findViewById(R.id.lv_content);sbSearch = (SearchBox) findViewById(R.id.searchbox);tvBottom = (TextView) findViewById(R.id.tv_bottom);mHistory = (ListView) findViewById(R.id.lv_history);bottom = (TextView) findViewById(R.id.tv_bottom);}public void init(){//結果的初始化listResult = new ArrayList<>();mResultAdapter = new SearchAdapter(MainActivity.this, listResult);mSearchResult.setAdapter(mResultAdapter);mSearchResult.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {}});//搜索框的初始化sbSearch.enableVoiceRecognition(this);sbSearch.setMenuListener(new SearchBox.MenuListener(){@Overridepublic void onMenuClick() {finish();}});sbSearch.setSearchListener(new SearchBox.SearchListener(){@Overridepublic void onSearchOpened() {//Use this to tint the screen}@Overridepublic void onSearchClosed() {//Use this to un-tint the screen}@Overridepublic void onSearchTermChanged(String term) {//搜索框內容修改就進行搜索，但只要點擊搜索按鈕才會加入搜索歷史search(term);updateBottom();if(listResult.size()==0){mHistory.setVisibility(View.VISIBLE);}else {mHistory.setVisibility(View.GONE);}}@Overridepublic void onSearch(String searchTerm) {search(searchTerm);saveHistory(searchTerm);initHistory();updateBottom();}@Overridepublic void onResultClick(SearchResult result) {//React to a result being clicked}@Overridepublic void onSearchCleared() {//Called when the clear button is clicked}});}private void initHistory(){final List<String> history = getHistory();mHistoryAdapter = new HistoryAdapter(MainActivity.this,history);mHistory.setAdapter(mHistoryAdapter);mHistory.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {sbSearch.populateEditText(history.get(position));sbSearch.setSearchString(history.get(position));}});}private void search(String newText){//若搜索內容為空if(newText.isEmpty()){listResult.clear();}else{for (String node : listSearch) {//在數據集遍歷搜索if (node.contains(newText)) {if(listResult.indexOf(node)==-1) {//如果結果集不含有它（為了防止結果重復）listResult.add(node);}}else{//搜索內容搜索不到相關 檢測是否之前有加入結果集 有則刪除if(listResult.indexOf(node)!=-1) {listResult.remove(node);}}}}mResultAdapter.notifyDataSetChanged();}private ArrayList<String> getHistory() {SharedPreferences reader = getSharedPreferences("history", MODE_PRIVATE);String data = reader.getString("data_history", "");ArrayList<String> history = new ArrayList<>();String [] get= data.split("\\|");for( String str:get){if(! history.contains(str) && !str.isEmpty()){history.add(str);}}return history;}private void saveHistory(String s){StringBuilder sb = new StringBuilder();SharedPreferences.Editor editor = getSharedPreferences("history",MODE_PRIVATE).edit();for (String str: getHistory()){sb.append(str);sb.append("|");}sb.append(s);editor.putString("data_history",sb.toString());editor.apply();}private void updateBottom(){if(sbSearch.getSearchText().trim().isEmpty()){bottom.setVisibility(View.GONE);return;}tvBottom.setVisibility(View.VISIBLE);tvBottom.setText("找到了 "+ listResult.size() +" 條記錄");}}

3.效果演示

這個項目只是個測試代碼，所以組件渲染和事件處理是存在很多bug的，歡迎指正。

項目github地址：https://github.com/luanshiyinyang/TestForPersistentSearch

總結

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