apps/oi-filemanager/FileManager/src/org/openintents/filemanager/util/ExtractManager.java

   1 package org.openintents.filemanager.util;\r
   2 \r
   3 import android.app.ProgressDialog;\r
   4 import android.os.AsyncTask;\r
   5 import android.util.Log;\r
   6 import android.widget.Toast;\r
   7 import org.openintents.filemanager.FileManagerActivity;\r
   8 import org.openintents.filemanager.R;\r
   9 \r
  10 import java.io.*;\r
  11 import java.util.Enumeration;\r
  12 import java.util.zip.ZipEntry;\r
  13 import java.util.zip.ZipFile;\r
  14 \r
  15 public class ExtractManager {\r
  16     /**\r
  17      * TAG for log messages.\r
  18      */\r
  19     static final String TAG = "ExtractManager";\r
  20 \r
  21     private static final int BUFFER_SIZE = 1024;\r
  22     private FileManagerActivity activity;\r
  23     private ProgressDialog progressDialog;\r
  24 \r
  25     public ExtractManager(FileManagerActivity activity) {\r
  26         this.activity = activity;\r
  27     }\r
  28 \r
  29     public void extract(File f, String destinationPath) {\r
  30             new ExtractTask().execute(f, destinationPath);\r
  31     }\r
  32 \r
  33     private class ExtractTask extends AsyncTask<Object, Void, Integer> {\r
  34         private static final int success = 0;\r
  35         private static final int error = 1;\r
  36 \r
  37         /**\r
  38          * count of extracted files to update the progress bar\r
  39          */\r
  40         private int isExtracted = 0;\r
  41 \r
  42         /**\r
  43          * Recursively extract file or directory\r
  44          */\r
  45         public boolean extract(File archive, String destinationPath) {\r
  46             try {\r
  47                 ZipFile zipfile = new ZipFile(archive);\r
  48                 int fileCount = zipfile.size();\r
  49                 for (Enumeration e = zipfile.entries(); e.hasMoreElements();) {\r
  50                     ZipEntry entry = (ZipEntry) e.nextElement();\r
  51                     unzipEntry(zipfile, entry, destinationPath);\r
  52                     isExtracted++;\r
  53                     progressDialog.setProgress((isExtracted * 100)/ fileCount);\r
  54                 }\r
  55                 return true;\r
  56             } catch (Exception e) {\r
  57                 Log.e(TAG, "Error while extracting file " + archive, e);\r
  58                 return false;\r
  59             }\r
  60         }        \r
  61         \r
  62         private void createDir(File dir) {\r
  63             if (dir.exists()) {\r
  64                 return;\r
  65             }\r
  66             Log.i(TAG, "Creating dir " + dir.getName());\r
  67             if (!dir.mkdirs()) {\r
  68                 throw new RuntimeException("Can not create dir " + dir);\r
  69             }\r
  70         }        \r
  71         \r
  72         private void unzipEntry(ZipFile zipfile, ZipEntry entry,\r
  73                                 String outputDir) throws IOException {\r
  74             if (entry.isDirectory()) {\r
  75                 createDir(new File(outputDir, entry.getName()));\r
  76                 return;\r
  77             }\r
  78             File outputFile = new File(outputDir, entry.getName());\r
  79             if (!outputFile.getParentFile().exists()) {\r
  80                 createDir(outputFile.getParentFile());\r
  81             }\r
  82             Log.i(TAG, "Extracting: " + entry);\r
  83             BufferedInputStream inputStream = new BufferedInputStream(zipfile.getInputStream(entry));\r
  84             BufferedOutputStream outputStream = new BufferedOutputStream(new FileOutputStream(outputFile));\r
  85             try {\r
  86                 int len;\r
  87                 byte buf[] = new byte[BUFFER_SIZE];\r
  88                 while ((len = inputStream.read(buf)) > 0) {\r
  89                     outputStream.write(buf, 0, len);\r
  90                 }\r
  91             } finally {\r
  92                 outputStream.close();\r
  93                 inputStream.close();\r
  94             }\r
  95         }\r
  96 \r
  97         @Override\r
  98         protected void onPreExecute() {\r
  99             progressDialog = new ProgressDialog(activity);\r
 100             progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);\r
 101             progressDialog.setMessage(activity.getResources().getString(R.string.extracting));\r
 102             progressDialog.show();\r
 103             progressDialog.setProgress(0);\r
 104             isExtracted = 0;\r
 105         }\r
 106 \r
 107         @Override\r
 108         protected Integer doInBackground(Object... params) {\r
 109             File f= (File) params[0];\r
 110             String destination = (String) params[1];\r
 111             boolean result = extract(f, destination);\r
 112             return result ? success : error;\r
 113         }\r
 114 \r
 115         @Override\r
 116         protected void onPostExecute(Integer result) {\r
 117             progressDialog.cancel();\r
 118             if (result == error){\r
 119                 Toast.makeText(activity, R.string.extracting_error, Toast.LENGTH_SHORT).show();\r
 120             } else if (result == success){\r
 121                 Toast.makeText(activity, R.string.extracting_success, Toast.LENGTH_SHORT).show();\r
 122             }\r
 123             activity.refreshList();\r
 124         }\r
 125     }\r
 126 }\r