add a media ContentProvider

Every time the ContentProvider is accessed, a file chooser opens and the
selected file is then provided as media file.

src/api-impl/android/provider/MediaStore.java

@@ -1,6 +1,13 @@
 package android.provider;
 
+import java.io.FileNotFoundException;
+
+import android.content.ContentResolver;
+import android.database.Cursor;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.net.Uri;
+import android.os.ParcelFileDescriptor;
 
 public class MediaStore {
 	
@@ -9,6 +16,43 @@ public class MediaStore {
 		public static class Media {
 
 			public static final Uri EXTERNAL_CONTENT_URI = Uri.parse("content://media/external/images/media");
+			public static final Uri INTERNAL_CONTENT_URI = Uri.parse("content://media/internal/images/media");
+		}
+
+		public static class Thumbnails {
+
+			public static Cursor queryMiniThumbnail(ContentResolver contentResolver, long id, int kind, String[] projection) {
+				return null;
+			}
+
+			public static Bitmap getThumbnail(ContentResolver contentResolver, long imageId, long groupId, int kind, BitmapFactory.Options options) throws FileNotFoundException {
+				ParcelFileDescriptor fd = contentResolver.openFileDescriptor(Media.EXTERNAL_CONTENT_URI.buildUpon().appendPath(String.valueOf(imageId)).build(), "r");
+				return BitmapFactory.decodeFileDescriptor(fd.getFileDescriptor(), null, options);
+			}
+		}
+	}
+
+	public static class Video {
+		
+		public static class Media {
+
+			public static final Uri EXTERNAL_CONTENT_URI = Uri.parse("content://media/external/video/media");
+			public static final Uri INTERNAL_CONTENT_URI = Uri.parse("content://media/internal/video/media");
+		}
+	}
+
+	public static class Audio {
+		
+		public static class Media {
+
+			public static final Uri EXTERNAL_CONTENT_URI = Uri.parse("content://media/external/audio/media");
+		}
+	}
+
+	public static class Files {
+
+		public static Uri getContentUri(String type) {
+			return Uri.parse("content://media/files/" + type);
 		}
 	}
 }