assets里的zip压缩文件并解压到指定路径下保存

/**

*解压Assets中的文件

*@param context上下文对象

*@param assetName压缩包文件名

*@param outputDirectory输出目录

*@throws IOException

*/

public

static

void

unZip(Context context, String assetName,String outputDirectory)

throws

IOException {

//创建解压目标目录

File file =

new

File(outputDirectory);

//如果目标目录不存在，则创建

if

(!file.exists()) {

file.mkdirs();

}

InputStream inputStream =

null

;

//打开压缩文件

inputStream = context.getAssets().open(assetName);

ZipInputStream zipInputStream =

new

ZipInputStream(inputStream);

//读取一个进入点

ZipEntry zipEntry = zipInputStream.getNextEntry();

//使用1Mbuffer

byte

[] buffer =

new

byte

[

1024

*

1024

];

//解压时字节计数

int

count =

0

;

//如果进入点为空说明已经遍历完所有压缩包中文件和目录

while

(zipEntry !=

null

) {

//如果是一个目录

if

(zipEntry.isDirectory()) {

//String name = zipEntry.getName();

//name = name.substring(0, name.length() - 1);

file =

new

File(outputDirectory + File.separator + zipEntry.getName());

file.mkdir();

}

else

{

//如果是文件

file =

new

File(outputDirectory + File.separator

+ zipEntry.getName());

//创建该文件

file.createNewFile();

FileOutputStream fileOutputStream =

new

FileOutputStream(file);

while

((count =zipInputStream.read(buffer)) > 

0

) {

fileOutputStream.write(buffer,

0

, count);

}

fileOutputStream.close();

}

//定位到下一个文件入口

zipEntry = zipInputStream.getNextEntry();

}

zipInputStream.close();

}