android txt文件保存读取操作

android 写了一个工具类实现txt文件保存和读取

/** Automatically generated file. DO NOT MODIFY */
package com.example.android_memorize;

public final class BuildConfig {
    public final static boolean DEBUG = true;
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件        475  2014-12-16 20:43  android_memorize\.classpath

     文件        852  2014-07-24 15:38  android_memorize\.project

     文件        177  2014-07-24 15:38  android_memorize\.settings\org.eclipse.jdt.core.prefs

     文件       1184  2014-07-24 15:51  android_memorize\AndroidManifest.xml

     文件       1184  2014-12-16 20:43  android_memorize\bin\AndroidManifest.xml

     文件     280236  2014-12-16 21:19  android_memorize\bin\android_memorize.apk

     文件        365  2014-12-16 20:43  android_memorize\bin\classes\com\example\android_memorize\BuildConfig.class

     文件       2821  2014-12-16 20:43  android_memorize\bin\classes\com\example\android_memorize\Fileservice.class

     文件       1663  2014-12-16 21:38  android_memorize\bin\classes\com\example\android_memorize\MainActivity$1.class

     文件       1343  2014-12-16 21:38  android_memorize\bin\classes\com\example\android_memorize\MainActivity$2.class

     文件       1681  2014-12-16 21:38  android_memorize\bin\classes\com\example\android_memorize\MainActivity.class

     文件       1482  2014-12-16 20:43  android_memorize\bin\classes\com\example\android_memorize\MyTest.class

     文件        370  2014-12-16 20:48  android_memorize\bin\classes\com\example\android_memorize\R$attr.class

     文件        491  2014-12-16 20:48  android_memorize\bin\classes\com\example\android_memorize\R$dimen.class

     文件        437  2014-12-16 20:48  android_memorize\bin\classes\com\example\android_memorize\R$drawable.class

     文件        518  2014-12-16 20:48  android_memorize\bin\classes\com\example\android_memorize\R$id.class

     文件        433  2014-12-16 20:48  android_memorize\bin\classes\com\example\android_memorize\R$layout.class

     文件        418  2014-12-16 20:48  android_memorize\bin\classes\com\example\android_memorize\R$menu.class

     文件        502  2014-12-16 20:48  android_memorize\bin\classes\com\example\android_memorize\R$string.class

     文件        461  2014-12-16 20:48  android_memorize\bin\classes\com\example\android_memorize\R$style.class

     文件        773  2014-12-16 20:48  android_memorize\bin\classes\com\example\android_memorize\R.class

     文件     692528  2014-12-16 21:19  android_memorize\bin\classes.dex

     文件     232610  2014-07-24 17:03  android_memorize\bin\dexedLibs\android-support-v4-f3ca51c279ac42299b5eec0ea923ed74.jar

     文件        120  2014-12-16 20:43  android_memorize\bin\jarlist.cache

     文件       5964  2014-07-24 17:02  android_memorize\bin\res\crunch\drawable-hdpi\ic_launcher.png

     文件       3112  2014-07-24 17:02  android_memorize\bin\res\crunch\drawable-mdpi\ic_launcher.png

     文件       9355  2014-07-24 17:02  android_memorize\bin\res\crunch\drawable-xhdpi\ic_launcher.png

     文件      17889  2014-07-24 17:02  android_memorize\bin\res\crunch\drawable-xxhdpi\ic_launcher.png

     文件      41373  2014-12-16 20:49  android_memorize\bin\resources.ap_

     文件        170  2014-12-16 20:43  android_memorize\gen\com\example\android_memorize\BuildConfig.java

............此处省略61个文件信息