diff options
Diffstat (limited to 'src/com/android/gallery3d/filtershow/provider/SharedImageProvider.java')
-rw-r--r-- | src/com/android/gallery3d/filtershow/provider/SharedImageProvider.java | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/provider/SharedImageProvider.java b/src/com/android/gallery3d/filtershow/provider/SharedImageProvider.java new file mode 100644 index 000000000..bc17a6e03 --- /dev/null +++ b/src/com/android/gallery3d/filtershow/provider/SharedImageProvider.java @@ -0,0 +1,137 @@ +/* + * Copyright (C) 2012 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.gallery3d.filtershow.provider; + +import android.content.ContentProvider; +import android.content.ContentValues; +import android.database.Cursor; +import android.database.MatrixCursor; +import android.net.Uri; +import android.os.ConditionVariable; +import android.os.ParcelFileDescriptor; +import android.provider.BaseColumns; +import android.provider.MediaStore; +import android.provider.OpenableColumns; + +import java.io.File; +import java.io.FileNotFoundException; + +public class SharedImageProvider extends ContentProvider { + + private static final String LOGTAG = "SharedImageProvider"; + + public static final String MIME_TYPE = "image/jpeg"; + public static final String AUTHORITY = "com.android.gallery3d.filtershow.provider.SharedImageProvider"; + public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/image"); + public static final String PREPARE = "prepare"; + + private final String[] mMimeStreamType = { + MIME_TYPE + }; + + private static ConditionVariable mImageReadyCond = new ConditionVariable(false); + + @Override + public int delete(Uri arg0, String arg1, String[] arg2) { + return 0; + } + + @Override + public String getType(Uri arg0) { + return MIME_TYPE; + } + + @Override + public String[] getStreamTypes(Uri arg0, String mimeTypeFilter) { + return mMimeStreamType; + } + + @Override + public Uri insert(Uri uri, ContentValues values) { + if (values.containsKey(PREPARE)) { + if (values.getAsBoolean(PREPARE)) { + mImageReadyCond.close(); + } else { + mImageReadyCond.open(); + } + } + return null; + } + + @Override + public int update(Uri arg0, ContentValues arg1, String arg2, String[] arg3) { + return 0; + } + + @Override + public boolean onCreate() { + return true; + } + + @Override + public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) { + String uriPath = uri.getLastPathSegment(); + if (uriPath == null) { + return null; + } + if (projection == null) { + projection = new String[] { + BaseColumns._ID, + MediaStore.MediaColumns.DATA, + OpenableColumns.DISPLAY_NAME, + OpenableColumns.SIZE + }; + } + // If we receive a query on display name or size, + // we should block until the image is ready + mImageReadyCond.block(); + + File path = new File(uriPath); + + MatrixCursor cursor = new MatrixCursor(projection); + Object[] columns = new Object[projection.length]; + for (int i = 0; i < projection.length; i++) { + if (projection[i].equalsIgnoreCase(BaseColumns._ID)) { + columns[i] = 0; + } else if (projection[i].equalsIgnoreCase(MediaStore.MediaColumns.DATA)) { + columns[i] = uri; + } else if (projection[i].equalsIgnoreCase(OpenableColumns.DISPLAY_NAME)) { + columns[i] = path.getName(); + } else if (projection[i].equalsIgnoreCase(OpenableColumns.SIZE)) { + columns[i] = path.length(); + } + } + cursor.addRow(columns); + + return cursor; + } + + @Override + public ParcelFileDescriptor openFile(Uri uri, String mode) + throws FileNotFoundException { + String uriPath = uri.getLastPathSegment(); + if (uriPath == null) { + return null; + } + // Here we need to block until the image is ready + mImageReadyCond.block(); + File path = new File(uriPath); + int imode = 0; + imode |= ParcelFileDescriptor.MODE_READ_ONLY; + return ParcelFileDescriptor.open(path, imode); + } +} |