android 解压缩zip包，首先一定要在menifest.xml中加入sdcard读写权限，如下：
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
实现代码：
public static void unZip(String unZipfileName, String mDestPath) {// unZipfileName需要解压的zip文件全路经
FileOutputStream fileOut;
ZipInputStream zipIn;
ZipEntry zipEntry;
File file;
int readedBytes;
byte buf[] = new byte[4096];
try {
zipIn = new ZipInputStream(new BufferedInputStream(
new FileInputStream(unZipfileName)));
while ((zipEntry = zipIn.getNextEntry()) != null) {
file = new File(mDestPath + zipEntry.getName());
if (zipEntry.isDirectory()) {
file.mkdirs();
} else {
// 如果指定文件的目录不存在,则创建之.
File parent = file.getParentFile();
if (!parent.exists()) {
parent.mkdirs();
}
fileOut = new FileOutputStream(file);
while ((readedBytes = zipIn.read(buf)) > 0) {
fileOut.write(buf, 0, readedBytes);
}
fileOut.close();
}
zipIn.closeEntry();
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
