QuickViewIntentBuilder.java revision 6eaf3863c81779233c032b7f7fc5b90e94f5f70a
1/* 2 * Copyright (C) 2015 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 17package com.android.documentsui; 18 19import static com.android.documentsui.model.DocumentInfo.getCursorString; 20 21import android.annotation.Nullable; 22import android.content.ClipData; 23import android.content.ClipDescription; 24import android.content.ComponentName; 25import android.content.Intent; 26import android.content.pm.PackageManager; 27import android.database.Cursor; 28import android.net.Uri; 29import android.provider.DocumentsContract; 30import android.provider.DocumentsContract.Document; 31import android.util.Log; 32 33import com.android.documentsui.BaseActivity.DocumentContext; 34import com.android.documentsui.model.DocumentInfo; 35 36/** 37 * Provides support for gather a list of quick-viewable files into a quick view intent. 38 */ 39final class QuickViewIntentBuilder { 40 41 private static final String TAG = "QvIntentBuilder"; 42 private static final boolean DEBUG = false; 43 44 private final DocumentInfo mDocument; 45 private final DocumentContext mContext; 46 47 public ClipData mClipData; 48 public int mDocumentLocation; 49 private PackageManager mPkgManager; 50 51 public QuickViewIntentBuilder( 52 PackageManager pkgManager, DocumentInfo doc, DocumentContext context) { 53 mPkgManager = pkgManager; 54 mDocument = doc; 55 mContext = context; 56 } 57 58 /** 59 * Builds the intent for quick viewing. Short circuits building if a handler cannot 60 * be resolved; in this case {@code null} is returned. 61 */ 62 @Nullable Intent build() { 63 if (DEBUG) Log.d(TAG, "Preparing intent for doc:" + mDocument.documentId); 64 65 Intent intent = new Intent(Intent.ACTION_QUICK_VIEW); 66 intent.setDataAndType(mDocument.derivedUri, mDocument.mimeType); 67 68 // Try to resolve the intent. If a matching app isn't installed, it won't resolve. 69 ComponentName handler = intent.resolveActivity(mPkgManager); 70 if (handler == null) { 71 return null; 72 } 73 74 Cursor cursor = mContext.getCursor(); 75 for (int i = 0; i < cursor.getCount(); i++) { 76 onNextItem(i, cursor); 77 } 78 79 intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); 80 intent.putExtra(Intent.EXTRA_INDEX, mDocumentLocation); 81 intent.setClipData(mClipData); 82 83 return intent; 84 } 85 86 private void onNextItem(int index, Cursor cursor) { 87 cursor.moveToPosition(index); 88 89 String mimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE); 90 if (Document.MIME_TYPE_DIR.equals(mimeType)) { 91 return; 92 } 93 94 String id = getCursorString(cursor, Document.COLUMN_DOCUMENT_ID); 95 String authority = getCursorString(cursor, RootCursorWrapper.COLUMN_AUTHORITY); 96 Uri uri = DocumentsContract.buildDocumentUri(authority, id); 97 if (DEBUG) Log.d(TAG, "Including file[" + id + "] @ " + uri); 98 99 if (id.equals(mDocument.documentId)) { 100 if (DEBUG) Log.d(TAG, "Found starting point for QV. " + index); 101 mDocumentLocation = index; 102 } 103 104 ClipData.Item item = new ClipData.Item(uri); 105 if (mClipData == null) { 106 mClipData = new ClipData( 107 "URIs", new String[]{ClipDescription.MIMETYPE_TEXT_URILIST}, item); 108 } else { 109 mClipData.addItem(item); 110 } 111 } 112} 113