1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.gallery3d.filtershow.provider; 18 19 import android.content.ContentProvider; 20 import android.content.ContentValues; 21 import android.database.Cursor; 22 import android.database.MatrixCursor; 23 import android.net.Uri; 24 import android.os.ConditionVariable; 25 import android.os.ParcelFileDescriptor; 26 import android.provider.BaseColumns; 27 import android.provider.MediaStore; 28 import android.provider.OpenableColumns; 29 30 import java.io.File; 31 import java.io.FileNotFoundException; 32 33 public class SharedImageProvider extends ContentProvider { 34 35 private static final String LOGTAG = "SharedImageProvider"; 36 37 public static final String MIME_TYPE = "image/jpeg"; 38 public static final String AUTHORITY = "com.android.gallery3d.filtershow.provider.SharedImageProvider"; 39 public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/image"); 40 public static final String PREPARE = "prepare"; 41 42 private final String[] mMimeStreamType = { 43 MIME_TYPE 44 }; 45 46 private static ConditionVariable mImageReadyCond = new ConditionVariable(false); 47 48 @Override delete(Uri arg0, String arg1, String[] arg2)49 public int delete(Uri arg0, String arg1, String[] arg2) { 50 return 0; 51 } 52 53 @Override getType(Uri arg0)54 public String getType(Uri arg0) { 55 return MIME_TYPE; 56 } 57 58 @Override getStreamTypes(Uri arg0, String mimeTypeFilter)59 public String[] getStreamTypes(Uri arg0, String mimeTypeFilter) { 60 return mMimeStreamType; 61 } 62 63 @Override insert(Uri uri, ContentValues values)64 public Uri insert(Uri uri, ContentValues values) { 65 if (values.containsKey(PREPARE)) { 66 if (values.getAsBoolean(PREPARE)) { 67 mImageReadyCond.close(); 68 } else { 69 mImageReadyCond.open(); 70 } 71 } 72 return null; 73 } 74 75 @Override update(Uri arg0, ContentValues arg1, String arg2, String[] arg3)76 public int update(Uri arg0, ContentValues arg1, String arg2, String[] arg3) { 77 return 0; 78 } 79 80 @Override onCreate()81 public boolean onCreate() { 82 return true; 83 } 84 85 @Override query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder)86 public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) { 87 String uriPath = uri.getLastPathSegment(); 88 if (uriPath == null) { 89 return null; 90 } 91 if (projection == null) { 92 projection = new String[] { 93 BaseColumns._ID, 94 MediaStore.MediaColumns.DATA, 95 OpenableColumns.DISPLAY_NAME, 96 OpenableColumns.SIZE 97 }; 98 } 99 // If we receive a query on display name or size, 100 // we should block until the image is ready 101 mImageReadyCond.block(); 102 103 File path = new File(uriPath); 104 105 MatrixCursor cursor = new MatrixCursor(projection); 106 Object[] columns = new Object[projection.length]; 107 for (int i = 0; i < projection.length; i++) { 108 if (projection[i].equalsIgnoreCase(BaseColumns._ID)) { 109 columns[i] = 0; 110 } else if (projection[i].equalsIgnoreCase(MediaStore.MediaColumns.DATA)) { 111 columns[i] = uri; 112 } else if (projection[i].equalsIgnoreCase(OpenableColumns.DISPLAY_NAME)) { 113 columns[i] = path.getName(); 114 } else if (projection[i].equalsIgnoreCase(OpenableColumns.SIZE)) { 115 columns[i] = path.length(); 116 } 117 } 118 cursor.addRow(columns); 119 120 return cursor; 121 } 122 123 @Override openFile(Uri uri, String mode)124 public ParcelFileDescriptor openFile(Uri uri, String mode) 125 throws FileNotFoundException { 126 String uriPath = uri.getLastPathSegment(); 127 if (uriPath == null) { 128 return null; 129 } 130 // Here we need to block until the image is ready 131 mImageReadyCond.block(); 132 File path = new File(uriPath); 133 int imode = 0; 134 imode |= ParcelFileDescriptor.MODE_READ_ONLY; 135 return ParcelFileDescriptor.open(path, imode); 136 } 137 } 138