Android保存键值，不用占用内存的sharedPreference，而是Properties本地文件

SharedPreference放在data/data/包名/下面。
是占用内存得，如果保存大量的数据，需要放到sdcard下去，所以SharedPreferences不方便，直接用Properties类的方式比较好。
可以把文件当作字符串传入，能访问获取正确值就好！
[java]
package com.nil.cache;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class PropertiesConfig extends Properties {

    String propertyPath="";
    private PropertiesConfig(String path) {
        propertyPath=path;
    };

    public static PropertiesConfig getInstance(String path) {
        {
            File file = new File(path);
            if (file.exists()) {
                try {
                    file.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            PropertiesConfig pro = new PropertiesConfig(path);
            try {
                InputStream is = new FileInputStream(file);
                pro.load(is);
                is.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
            return pro;
        }

    }

    @Override
    public Object setProperty(String key, String value) {
        super.setProperty(key, value);
        try {
            this.store(new FileOutputStream(this.propertyPath),
                    "utf-8");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return value;
    }

    public Object put(String key, String value) {
        super.put(key, value);
        try {
            this.store(new FileOutputStream(this.propertyPath),
                    "utf-8");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return value;
    }
}
嘿嘿！怎么用呢？
大概如下调用即可：
[java]
PropertiesConfig.getInstance("/sdcard/client_config.xml").setProperty("187", "name");

PropertiesConfig.getInstance("/sdcard/client_config.xml").get("187");

补充：移动开发 , Android ,