android项目中如何获取assets下面的文件在SD卡上面的保存路径

直接上代码

package com.dtBank.app.service;

import java.io.File;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.OutputStream;

import android.content.Context;

import android.os.Environment;

import android.util.Log;

/**

* 获得assets文件夹下面文件的路径

* @author hb

*

*/

public class getEncryptionFilePath {

class Obj{

InputStream in;

String fileDir;

String folder;

}

String lock="";

private void getCryptFilePath(Obj obj){

synchronized(lock){

try{

if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {

File cryptDir= new File(obj.folder);

// Log.v("bb","创建的文件夹："+obj.folder);

cryptDir.mkdirs();

OutputStream os= new FileOutputStream(obj.fileDir);

byte[] buf = new byte[1024*10];

int l;

//Log.v("bb","开始写文件");

InputStream in=obj.in;

while ((l = in.read(buf)) != -1) {

os.write(buf, 0, l);

os.flush();

}

//Log.v("bb","文件已写完");

os.close();

in.close();

}

}catch(Exception e){

e.printStackTrace();

}

}

}

//调用此方法 传入context对象即可

public void execute(Context context){

InputStream in=null;

OutputStream out=null;

try{

in =(context.getAssets().open("mixed.dat"));

String fileDir_mixed="/sdcard/.xcloudmixed/mixed.dat";

final Obj obj=new Obj();

obj.in=in;

obj.fileDir=fileDir_mixed;

obj.folder="/sdcard/.xcloudmixed";

new Thread(){

@Override

public void run(){

getCryptFilePath(obj);

}

}.start();

in =(context.getAssets().open("public.dat"));

String fileDir_public="/sdcard/.xcloudpublic/public.dat";

final Obj obj1=new Obj();

obj1.in=in;

obj1.fileDir=fileDir_public;

obj1.folder="/sdcard/.xcloudpublic";

new Thread(){

@Override

public void run(){

getCryptFilePath(obj1);

}

}.start();

}catch(Exception e){

e.printStackTrace();

}

}

}