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有时引入第三平台时使用SharePreference存储数据，数据会失效。 这时可以考虑使用properties文件存储数据，简单方便。

import android.util.Log;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.util.Properties;/** * Created by Administrator on 2016/7/5. */public class ConfigTool {
       public static final  String configPath="/mnt/sdcard/my_config.properties";    public static Properties loadConfig(String file) {        Log.i("lingling", "loadConfig");        Properties properties = new Properties();        try {            File config=new File(file);            if(config==null||!config.exists()){                Log.i("lingling", "loadConfig FileInputStream is null");                saveMyConfig(file,properties);                loadConfig(file);            }            FileInputStream s = new FileInputStream(file);            properties.load(s);            Log.i("lingling", "properties.load(s)");            Log.i("lingling",properties.toString());        }catch (IOException e) {            Log.i("lingling", e.getMessage());            e.printStackTrace();        }        return properties;    }    public static void deleteConfig(String file) {        Properties properties = new Properties();            File config=new File(file);            if(config!=null){                config.delete();            }    }    public static void saveMyConfig( String file, Properties properties) {        Log.i("lingling", "saveMyConfig");        try {            FileOutputStream s = new FileOutputStream(file, false);            properties.store(s, "save");            Log.i("lingling", "properties.store");        } catch (IOException  e){            Log.i("lingling", e.getMessage());            e.printStackTrace();        }    }    public  static void saveConfig(String key, Object value) {        Properties properties=ConfigTool.loadConfig(ConfigTool.configPath);        properties.put(key,value);        ConfigTool.saveMyConfig(ConfigTool.configPath,properties);    }}

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