我想在android上解压缩一个zip文件。我搜索并找到了这段代码;我试图实现它没有成功。有人能告诉我为什么吗?我似乎无法找到问题。
我复制了SD卡上的main.zip
文件,但是在运行程序后,我在SD卡上找不到unzipFile
文件夹。为什么会出现这种情况?
另外,如果我要解压缩资产文件夹的文件,我如何在资产中获取此文件的路径并将此路径保存在String变量中?感谢。
public class Decompress {
private String _zipFile;
private String _location;
public Decompress(String zipFile, String location) {
_zipFile = zipFile;
_location = location;
_dirChecker("");
}
public void unzip() {
try {
FileInputStream fin = new FileInputStream(_zipFile);
ZipInputStream zin = new ZipInputStream(fin);
ZipEntry ze = null;
while ((ze = zin.getNextEntry()) != null) {
Log.e("Decompress", "Unzipping " + ze.getName());
if(ze.isDirectory()) {
_dirChecker(ze.getName());
} else {
FileOutputStream fout = new FileOutputStream(_location + ze.getName());
for (int c = zin.read(); c != -1; c = zin.read()) {
fout.write(c);
}
zin.closeEntry();
fout.close();
}
}
zin.close();
} catch(Exception e) {
Log.e("Decompress", "unzip", e);
}
}
private void _dirChecker(String dir) {
File f = new File(_location + dir);
if(!f.isDirectory()) {
f.mkdirs();
}
}
}
main.java:
public class UnZipFile extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.e("he", "heee");
Toast.makeText(this, "in activity", Toast.LENGTH_LONG).show();
String zipFile = Environment.getExternalStorageDirectory()
+ "/main.zip";// "file:///android_asset/main.zip";
String unzipLocation = Environment.getExternalStorageDirectory()
+ "/unzipFile/";
Decompress d = new Decompress(zipFile, unzipLocation);
d.unzip();
}
}
的manifest.xml:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
答案 0 :(得分:0)
也许,你无法访问SD卡。你检查一下,创建一个文件并检查是否存在。