android在当前app该文件下创建一个文件夹

/*********************************************************************
* Author  : Samson
* Date    : 04/22/2014
* Test platform:
*              3.11.0-12-generic #19-Ubuntu
*              GNU bash, version 4.2.45
* *******************************************************************/
package com.example.listfile;

import java.io.File;
import java.io.IOException;

import android.app.Activity;
import android.content.Context;
import android.widget.TextView;
import android.os.Bundle;
import android.os.Process;

public class MainActivity extends Activity
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
int myProcessID = Process.myPid();
File yygypath = this.getFilesDir();//this.getCacheDir();
String yygypathstr = yygypath.toString();
File file = new File(yygypath, "yygytest");
try {
file.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
yygypathstr = yygypathstr + " pid is " + myProcessID;

TextView  tv = new TextView(this);
tv.setText(yygypathstr);
setContentView(tv);
}
public void onDestory()
{
super.onDestroy();
this.finish();
android.os.Process.killProcess(android.os.Process.myPid());
System.exit(0);
}
}

主要是这两个函数：
[code]this.getFilesDir(); 这个是得到当前app文件夹下的files文件夹路径
this.getCacheDir(); 这个是得到当前app文件夹下的cache文件夹路径

结果：
adb shell result:
root@generic:/data/data/com.example.listfile/files # ll
-rw------- u0_a53 u0_a53 0 2014-04-21 13:38 yygytest
root@generic:/data/data/com.example.listfile/files # [/code]