android文件读取、写入（自带空间、SDCard）的记事本程序程序

android文件读取、写入(自带空间、SDCard)的记事本程序，代码较为精简，该注释的地方也都有标注

/* AUTO-GENERATED FILE.  DO NOT MODIFY.
 *
 * This class was automatically generated by the
 * aapt tool from the resource data it found.  It
 * should not be modified by hand.
 */

package cc.icoc.javaxu.texteditutiltool;

public final class R {
    public static final class attr {
    }
    public static final class drawable {
        public static final int beijing=0x7f020000;
        public static final int ic_launcher=0x7f020001;
    }
    public static final class id {
        public static final int ButtonLayout=0x7f060002;
        public static final int btnClean=0x7f060004;
        public static final int btnExit=0x7f060005;
        public static final int btnRead=0x7f060006;
        public static final int btnSave=0x7f060003;
        public static final int edit=0x7f060001;
        public static final int editName=0x7f060000;
    }
    public static final class layout {
        public static final int main=0x7f030000;
    }
    public static final class raw {
        public static final int txt=0x7f040000;
    }
    public static final class string {
        public static final int app_name=0x7f050001;
        public static final int btnClean=0x7f050003;
        public static final int btnExit=0x7f050004;
        public static final int btnRead=0x7f050007;
        public static final int btnSave=0x7f050002;
        public static final int content_null=0x7f050009;
        public static final int exist=0x7f05000b;
        public static final int fileName=0x7f050008;
        public static final int hello=0x7f050000;
        public static final int reading=0x7f05000a;
        public static final int tip1=0x7f050005;
        public static final int tip2=0x7f050006;
    }
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2013-04-10 11:23  TextEditTool\
     文件         364  2013-04-10 10:36  TextEditTool\.classpath
     文件         848  2013-04-10 10:36  TextEditTool\.project
     目录           0  2013-04-10 10:36  TextEditTool\.settings\
     文件         177  2013-04-10 10:36  TextEditTool\.settings\org.eclipse.jdt.core.prefs
     文件        1012  2013-04-11 09:38  TextEditTool\AndroidManifest.xml
     目录           0  2013-04-10 10:36  TextEditTool\assets\
     目录           0  2013-04-11 11:06  TextEditTool\bin\
     目录           0  2013-04-10 10:36  TextEditTool\bin\classes\
     目录           0  2013-04-10 10:36  TextEditTool\bin\classes\cc\
     目录           0  2013-04-10 10:36  TextEditTool\bin\classes\cc\icoc\
     目录           0  2013-04-10 10:36  TextEditTool\bin\classes\cc\icoc\javaxu\
     目录           0  2013-04-11 11:15  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\
     文件        2627  2013-04-11 11:10  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\FileService.class
     文件         379  2013-04-11 14:56  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\R$attr.class
     文件         477  2013-04-11 14:56  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\R$drawable.class
     文件         614  2013-04-11 14:56  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\R$id.class
     文件         433  2013-04-11 14:56  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\R$layout.class
     文件         423  2013-04-11 14:56  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\R$raw.class
     文件         775  2013-04-11 14:56  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\R$string.class
     文件         679  2013-04-11 14:56  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\R.class
     文件        1149  2013-04-11 15:01  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\TextEditToolActivity$Buttonclick$1.class
     文件        1095  2013-04-11 15:01  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\TextEditToolActivity$Buttonclick$2.class
     文件        3461  2013-04-11 15:01  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\TextEditToolActivity$Buttonclick.class
     文件        1499  2013-04-11 15:01  TextEditTool\bin\classes\cc\icoc\javaxu\texteditutiltool\TextEditToolActivity.class
     文件        8040  2013-04-11 11:06  TextEditTool\bin\classes.dex
     目录           0  2013-04-10 15:12  TextEditTool\bin\res\
     目录           0  2013-04-10 15:12  TextEditTool\bin\res\drawable-hdpi\
     文件        3966  2013-04-10 15:12  TextEditTool\bin\res\drawable-hdpi\ic_launcher.png
     目录           0  2013-04-10 15:12  TextEditTool\bin\res\drawable-ldpi\
     文件        1537  2013-04-10 15:12  TextEditTool\bin\res\drawable-ldpi\ic_launcher.png
............此处省略34个文件信息