SearchEngineUtil.java

package com.forfan.bigbang.util;

import com.forfan.bigbang.entity.SearchEngine;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.shang.commonjar.contentProvider.SPHelper;

import java.util.ArrayList;

/**
 * Created by wangyan-pd on 2016/12/3.
 */

public class SearchEngineUtil {
    private static final String SEARCH_ENGINES = "search_engines_list";
    private static final String ENGINES = "[{\n" +
            "\"title\":\"百度\",\n" +
            "\"url\":\"https://m.baidu.com/s?word=\"\n" +
            "},{\n" +
            "\"title\":\"谷歌\",\n" +
            "\"url\":\"https://www.google.com/search?q=\"\n" +
            "},{\n" +
            "\"title\":\"必应\",\n" +
            "\"url\":\"https://www.bing.com/search?q=\"\n" +
            "},{\n" +
            "\"title\":\"淘宝\",\n" +
            "\"url\":\"https://s.m.taobao.com/h5?q=\"\n" +
            "},{\n" +
            "\"title\":\"知乎\",\n" +
            "\"url\":\"https://www.zhihu.com/search?q=\"\n" +
            "}\n" +
            ",{\n" +
            "\"title\":\"谷歌翻译\",\n" +
            "\"url\":\"http://translate.google.cn/m/translate?q=\"\n" +
            "}\n" +
            "]";
    private static SearchEngineUtil searchEngineUtil;
    private ArrayList<SearchEngine> searchEngines;

    public void save(ArrayList<SearchEngine> searchEngines) {
        if(searchEngines != null){
            SPHelper.save(SEARCH_ENGINES, new Gson().toJson(searchEngines));
            searchEngineUtil.searchEngines = searchEngines;
        }
    }

    public ArrayList<String> getSearchEngineNames() {
        ArrayList<String> names = new ArrayList<>();
        for(SearchEngine s : searchEngineUtil.getSearchEngines()){
            names.add(s.title);
        }
        return names;
    }

    public static SearchEngineUtil getInstance(){
        if(searchEngineUtil == null){
            searchEngineUtil = new SearchEngineUtil();
            if (searchEngineUtil.searchEngines == null) {
                String s = SPHelper.getString(SEARCH_ENGINES, ENGINES);
                searchEngineUtil.searchEngines = new Gson().fromJson(s, new TypeToken<ArrayList<SearchEngine>>() {
                }.getType());
            }
        }
        return searchEngineUtil;
    }
    public  ArrayList<SearchEngine> getSearchEngines(){
        return searchEngines;
    }
    public void addSearchEngine(SearchEngine searchEngine){
        if(searchEngines != null){
            searchEngines.add(searchEngine);
        }
    }
}