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.providers.downloads; 18 19 import static android.app.DownloadManager.COLUMN_LOCAL_FILENAME; 20 import static android.app.DownloadManager.COLUMN_LOCAL_URI; 21 import static android.app.DownloadManager.COLUMN_MEDIA_TYPE; 22 import static android.app.DownloadManager.COLUMN_URI; 23 import static android.provider.Downloads.Impl.ALL_DOWNLOADS_CONTENT_URI; 24 import static com.android.providers.downloads.Constants.TAG; 25 26 import android.app.DownloadManager; 27 import android.content.ActivityNotFoundException; 28 import android.content.ContentUris; 29 import android.content.Context; 30 import android.content.Intent; 31 import android.database.Cursor; 32 import android.net.Uri; 33 import android.provider.Downloads.Impl.RequestHeaders; 34 import android.util.Log; 35 36 import java.io.File; 37 38 public class OpenHelper { 39 /** 40 * Build and start an {@link Intent} to view the download with given ID, 41 * handling subtleties around installing packages. 42 */ startViewIntent(Context context, long id, int intentFlags)43 public static boolean startViewIntent(Context context, long id, int intentFlags) { 44 final Intent intent = OpenHelper.buildViewIntent(context, id); 45 if (intent == null) { 46 Log.w(TAG, "No intent built for " + id); 47 return false; 48 } 49 50 intent.addFlags(intentFlags); 51 try { 52 context.startActivity(intent); 53 return true; 54 } catch (ActivityNotFoundException e) { 55 Log.w(TAG, "Failed to start " + intent + ": " + e); 56 return false; 57 } 58 } 59 60 /** 61 * Build an {@link Intent} to view the download with given ID, handling 62 * subtleties around installing packages. 63 */ buildViewIntent(Context context, long id)64 private static Intent buildViewIntent(Context context, long id) { 65 final DownloadManager downManager = (DownloadManager) context.getSystemService( 66 Context.DOWNLOAD_SERVICE); 67 downManager.setAccessAllDownloads(true); 68 69 final Cursor cursor = downManager.query(new DownloadManager.Query().setFilterById(id)); 70 try { 71 if (!cursor.moveToFirst()) { 72 return null; 73 } 74 75 final Uri localUri = getCursorUri(cursor, COLUMN_LOCAL_URI); 76 final File file = getCursorFile(cursor, COLUMN_LOCAL_FILENAME); 77 String mimeType = getCursorString(cursor, COLUMN_MEDIA_TYPE); 78 mimeType = DownloadDrmHelper.getOriginalMimeType(context, file, mimeType); 79 80 final Intent intent = new Intent(Intent.ACTION_VIEW); 81 82 if ("application/vnd.android.package-archive".equals(mimeType)) { 83 // PackageInstaller doesn't like content URIs, so open file 84 intent.setDataAndType(localUri, mimeType); 85 86 // Also splice in details about where it came from 87 final Uri remoteUri = getCursorUri(cursor, COLUMN_URI); 88 intent.putExtra(Intent.EXTRA_ORIGINATING_URI, remoteUri); 89 intent.putExtra(Intent.EXTRA_REFERRER, getRefererUri(context, id)); 90 intent.putExtra(Intent.EXTRA_ORIGINATING_UID, getOriginatingUid(context, id)); 91 } else if ("file".equals(localUri.getScheme())) { 92 intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION 93 | Intent.FLAG_GRANT_WRITE_URI_PERMISSION); 94 intent.setDataAndType( 95 ContentUris.withAppendedId(ALL_DOWNLOADS_CONTENT_URI, id), mimeType); 96 } else { 97 intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); 98 intent.setDataAndType(localUri, mimeType); 99 } 100 101 return intent; 102 } finally { 103 cursor.close(); 104 } 105 } 106 getRefererUri(Context context, long id)107 private static Uri getRefererUri(Context context, long id) { 108 final Uri headersUri = Uri.withAppendedPath( 109 ContentUris.withAppendedId(ALL_DOWNLOADS_CONTENT_URI, id), 110 RequestHeaders.URI_SEGMENT); 111 final Cursor headers = context.getContentResolver() 112 .query(headersUri, null, null, null, null); 113 try { 114 while (headers.moveToNext()) { 115 final String header = getCursorString(headers, RequestHeaders.COLUMN_HEADER); 116 if ("Referer".equalsIgnoreCase(header)) { 117 return getCursorUri(headers, RequestHeaders.COLUMN_VALUE); 118 } 119 } 120 } finally { 121 headers.close(); 122 } 123 return null; 124 } 125 getOriginatingUid(Context context, long id)126 private static int getOriginatingUid(Context context, long id) { 127 final Uri uri = ContentUris.withAppendedId(ALL_DOWNLOADS_CONTENT_URI, id); 128 final Cursor cursor = context.getContentResolver().query(uri, new String[]{Constants.UID}, 129 null, null, null); 130 if (cursor != null) { 131 try { 132 if (cursor.moveToFirst()) { 133 return cursor.getInt(cursor.getColumnIndexOrThrow(Constants.UID)); 134 } 135 } finally { 136 cursor.close(); 137 } 138 } 139 return -1; 140 } 141 getCursorString(Cursor cursor, String column)142 private static String getCursorString(Cursor cursor, String column) { 143 return cursor.getString(cursor.getColumnIndexOrThrow(column)); 144 } 145 getCursorUri(Cursor cursor, String column)146 private static Uri getCursorUri(Cursor cursor, String column) { 147 return Uri.parse(getCursorString(cursor, column)); 148 } 149 getCursorFile(Cursor cursor, String column)150 private static File getCursorFile(Cursor cursor, String column) { 151 return new File(cursor.getString(cursor.getColumnIndexOrThrow(column))); 152 } 153 } 154