apps/oi-filemanager/FileManager/src/org/openintents/filemanager/FileManagerProvider.java

   1 package org.openintents.filemanager;\r
   2 \r
   3 import java.io.File;\r
   4 import java.io.FileNotFoundException;\r
   5 import java.io.IOException;\r
   6 \r
   7 import org.openintents.filemanager.util.MimeTypeParser;\r
   8 import org.openintents.filemanager.util.MimeTypes;\r
   9 import org.xmlpull.v1.XmlPullParserException;\r
  10 \r
  11 import android.content.ContentProvider;\r
  12 import android.content.ContentValues;\r
  13 import android.content.Context;\r
  14 import android.content.pm.PackageManager.NameNotFoundException;\r
  15 import android.content.res.XmlResourceParser;\r
  16 import android.database.Cursor;\r
  17 import android.database.MatrixCursor;\r
  18 import android.net.Uri;\r
  19 import android.os.ParcelFileDescriptor;\r
  20 import android.provider.MediaStore;\r
  21 import android.util.Log;\r
  22 \r
  23 public class FileManagerProvider extends ContentProvider {\r
  24 \r
  25         static final String FILE_PROVIDER_PREFIX = "content://org.openintents.filemanager";\r
  26         private static final String TAG = "FileManagerProvider";\r
  27         public static final String AUTHORITY = "org.openintents.filemanager";\r
  28         private MimeTypes mMimeTypes;\r
  29 \r
  30         @Override\r
  31         public boolean onCreate() {\r
  32                 getMimeTypes();\r
  33                 return true;\r
  34         }\r
  35 \r
  36         private void getMimeTypes() {\r
  37                 Context ctx = getContext();\r
  38                 MimeTypeParser mtp = null;\r
  39                 try {\r
  40                         mtp = new MimeTypeParser(ctx, ctx.getPackageName());\r
  41                 } catch (NameNotFoundException e) {\r
  42                         //Should never get here\r
  43                 }\r
  44                 XmlResourceParser in = \r
  45                         getContext().getResources().getXml(R.xml.mimetypes);\r
  46 \r
  47                 try {\r
  48                         mMimeTypes = mtp.fromXmlResource(in);\r
  49                 } catch (XmlPullParserException e) {\r
  50                         Log.e(TAG, "PreselectedChannelsActivity: XmlPullParserException", e);\r
  51                         throw new RuntimeException(\r
  52                                         "PreselectedChannelsActivity: XmlPullParserException");\r
  53                 } catch (IOException e) {\r
  54                         Log.e(TAG, "PreselectedChannelsActivity: IOException", e);\r
  55                         throw new RuntimeException(\r
  56                                         "PreselectedChannelsActivity: IOException");\r
  57                 }\r
  58         }\r
  59 \r
  60         @Override\r
  61         public int delete(Uri uri, String s, String[] as) {\r
  62                 // not supported\r
  63                 return 0;\r
  64         }\r
  65 \r
  66         @Override\r
  67         public String getType(Uri uri) {\r
  68                 // return file extension (uri.lastIndexOf("."))\r
  69                 return mMimeTypes.getMimeType(uri.toString());\r
  70         }\r
  71 \r
  72         @Override\r
  73         public Uri insert(Uri uri, ContentValues contentvalues) {\r
  74                 // not supported\r
  75                 return null;\r
  76         }\r
  77 \r
  78         @Override\r
  79         public Cursor query(Uri uri, String[] projection, String s, \r
  80                         String[] as1, String s1) {\r
  81                 if (uri.toString().startsWith(FILE_PROVIDER_PREFIX)) {\r
  82                         if (projection == null || projection.length == 0) {\r
  83                                 // Standard projection including all supported rows\r
  84                                 projection = new String [] {\r
  85                                                                 MediaStore.MediaColumns.DATA,\r
  86                                                                 MediaStore.MediaColumns.MIME_TYPE,\r
  87                                                                 MediaStore.MediaColumns.DISPLAY_NAME,\r
  88                                                                 MediaStore.MediaColumns.SIZE};\r
  89                         } \r
  90                         \r
  91                         MatrixCursor c = new MatrixCursor(projection);\r
  92                         MatrixCursor.RowBuilder row = c.newRow();\r
  93                         \r
  94                         // data = absolute path to file\r
  95                         String data = uri.getPath();\r
  96                         \r
  97                         int fromIndex = data.lastIndexOf(File.separatorChar) + 1;\r
  98                         if (fromIndex >= data.length()) {\r
  99                                 // Last character was '/' or data is empty, so no file name \r
 100                                 // was specified and we don't want to raise an \r
 101                                 // IndexOutOfBoundsException\r
 102                                 throw new RuntimeException("No file name specified: ".concat(data));\r
 103                         }\r
 104                         \r
 105                         // According to Android docs, DISPLAY_NAME should be\r
 106                         // the last segment of Uri\r
 107                         String displayName = \r
 108                                 (fromIndex > 0) ? data.substring(fromIndex) : data;\r
 109                         \r
 110                         String mimeType = mMimeTypes.getMimeType(data);\r
 111                                 \r
 112                         long size = -1;\r
 113                         File file = new File(data);                     \r
 114                         if (file.exists() && file.isFile()) {\r
 115                                 size = file.length();\r
 116                         }\r
 117                         \r
 118                         for (String col : projection) {\r
 119                                 if (col.equals(MediaStore.MediaColumns.DATA)) {\r
 120                                         row.add(data);\r
 121                                 } else if (col.equals(MediaStore.MediaColumns.MIME_TYPE)) {\r
 122                                         row.add(mimeType);\r
 123                                 } else if (col.equals(MediaStore.MediaColumns.DISPLAY_NAME)) {\r
 124                                         row.add(displayName);\r
 125                                 } else if (col.equals(MediaStore.MediaColumns.SIZE)) {\r
 126                                         if (size >= 0)\r
 127                                                 row.add(size);\r
 128                                         else {\r
 129                                                 // According to Android docs for unknown size.\r
 130                                                 // Standard getLong() won't throw exception and\r
 131                                                 // value will be 0.\r
 132                                                 row.add(null);\r
 133                                         }\r
 134                                 } else {\r
 135                                         // Unsupported or unknown columns are filled up with null\r
 136                                         row.add(null);\r
 137                                 }\r
 138                         }\r
 139                         \r
 140                         return c;\r
 141                 } else {\r
 142                         throw new RuntimeException("Unsupported uri");\r
 143                 }\r
 144         }\r
 145         \r
 146         @Override\r
 147         public ParcelFileDescriptor openFile(Uri uri, String mode)\r
 148                         throws FileNotFoundException {\r
 149                 if (uri.toString().startsWith(FILE_PROVIDER_PREFIX)) {\r
 150                         int m = ParcelFileDescriptor.MODE_READ_ONLY;\r
 151                         if (mode.equalsIgnoreCase("rw"))\r
 152                                 m = ParcelFileDescriptor.MODE_READ_WRITE;\r
 153                         File f = new File(uri.getPath());\r
 154                         ParcelFileDescriptor pfd = ParcelFileDescriptor.open(f, m);\r
 155                         return pfd;\r
 156                 } else {\r
 157                         throw new FileNotFoundException ("Unsupported uri: " + uri.toString());\r
 158                 }\r
 159         }\r
 160 \r
 161         @Override\r
 162         public int update(Uri uri, ContentValues contentvalues, String s, String[] as) {\r
 163                 // not supported\r
 164                 return 0;\r
 165         }\r
 166 \r
 167 }\r