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我想解壓Android設備的SDCARD上的文件。 如果ZIP文件只包含文件NOT FOLDERS一切都很好。但是，我希望應用程序解壓縮的生產文件包含多個目錄和子目錄。這是我遇到問題的地方。Android UNZIP Inputstream問題
該代碼不會創建所需的文件夾結構。如果我在運行該類之前手動創建文件夾，它將按計劃解壓縮，但將來我不知道目錄結構並需要代碼來創建適當的文件夾結構。 這是我與
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.widget.TextView;
public class HomeActivity extends Activity
{
private TextView tv;
private static final String ROOT_FOLDER = Environment.getExternalStorageDirectory()
+ File.separator + "FacebookPhotos";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tv = (TextView) findViewById(R.id.tv);
tv.append("Reading zip file from assets folder...");
// Start the unzipping process
thread.start();
}
private Thread thread = new Thread()
{
@Override
public void run()
{
sendMessage("-----------------------------------------------");
// Create a directory in the SDCard to store the files
File file = new File(ROOT_FOLDER);
if (!file.exists())
{
file.mkdirs();
}
else
{
file.delete();
}
try
{
// Open the ZipInputStream
ZipInputStream inputStream = new ZipInputStream(new FileInputStream("/sdcard/Photos/photos.zip"));
// Loop through all the files and folders
for (ZipEntry entry = inputStream.getNextEntry(); entry != null; entry = inputStream
.getNextEntry())
{
sendMessage("Extracting: " + entry.getName() + "...");
String innerFileName = ROOT_FOLDER + File.separator + entry.getName();
File innerFile = new File(innerFileName);
if (innerFile.exists())
{
innerFile.delete();
}
// Check if it is a folder
if (entry.isDirectory())
{
// Its a folder, create that folder
innerFile.mkdirs();
}
else
{
// Create a file output stream
FileOutputStream outputStream = new FileOutputStream(innerFileName);
final int BUFFER = 2048;
// Buffer the output to the file
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(outputStream,
BUFFER);
// Write the contents
int count = 0;
byte[] data = new byte[BUFFER];
while ((count = inputStream.read(data, 0, BUFFER)) != -1)
{
bufferedOutputStream.write(data, 0, count);
}
// Flush and close the buffers
bufferedOutputStream.flush();
bufferedOutputStream.close();
}
sendMessage("DONE");
// Close the current entry
inputStream.closeEntry();
}
inputStream.close();
sendMessage("-----------------------------------------------");
sendMessage("Unzipping complete");
}
catch (IOException e)
{
sendMessage("Exception occured: " + e.getMessage());
e.printStackTrace();
}
}
};
private Handler handler = new Handler()
{
@Override
public void handleMessage(Message msg)
{
tv.append("\n" + msg.getData().getString("data"));
super.handleMessage(msg);
}
};
private void sendMessage(String text)
{
Message message = new Message();
Bundle data = new Bundle();
data.putString("data", text);
message.setData(data);
handler.sendMessage(message);
}
}