1 /* 2 * Copyright (C) 2011 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 package com.android.contacts.common.list; 17 18 import android.content.Context; 19 import android.content.CursorLoader; 20 import android.database.Cursor; 21 import android.database.MatrixCursor; 22 import android.database.MergeCursor; 23 import android.os.Bundle; 24 import android.provider.ContactsContract.Profile; 25 26 import com.google.common.collect.Lists; 27 28 import java.util.List; 29 30 /** 31 * A loader for use in the default contact list, which will also query for the user's profile 32 * if configured to do so. 33 */ 34 public class ProfileAndContactsLoader extends CursorLoader { 35 36 private boolean mLoadProfile; 37 private String[] mProjection; 38 39 public ProfileAndContactsLoader(Context context) { 40 super(context); 41 } 42 43 public void setLoadProfile(boolean flag) { 44 mLoadProfile = flag; 45 } 46 47 public void setProjection(String[] projection) { 48 super.setProjection(projection); 49 mProjection = projection; 50 } 51 52 @Override 53 public Cursor loadInBackground() { 54 // First load the profile, if enabled. 55 List<Cursor> cursors = Lists.newArrayList(); 56 if (mLoadProfile) { 57 cursors.add(loadProfile()); 58 } 59 // ContactsCursor.loadInBackground() can return null; MergeCursor 60 // correctly handles null cursors. 61 Cursor cursor = null; 62 try { 63 cursor = super.loadInBackground(); 64 } catch (NullPointerException e) { 65 // Ignore NPEs thrown by providers 66 } 67 final Cursor contactsCursor = cursor; 68 cursors.add(contactsCursor); 69 return new MergeCursor(cursors.toArray(new Cursor[cursors.size()])) { 70 @Override 71 public Bundle getExtras() { 72 // Need to get the extras from the contacts cursor. 73 return contactsCursor == null ? new Bundle() : contactsCursor.getExtras(); 74 } 75 }; 76 } 77 78 /** 79 * Loads the profile into a MatrixCursor. On failure returns null, which 80 * matches the behavior of CursorLoader.loadInBackground(). 81 * 82 * @return MatrixCursor containing profile or null on query failure. 83 */ 84 private MatrixCursor loadProfile() { 85 Cursor cursor = getContext().getContentResolver().query(Profile.CONTENT_URI, mProjection, 86 null, null, null); 87 if (cursor == null) { 88 return null; 89 } 90 try { 91 MatrixCursor matrix = new MatrixCursor(mProjection); 92 Object[] row = new Object[mProjection.length]; 93 while (cursor.moveToNext()) { 94 for (int i = 0; i < row.length; i++) { 95 row[i] = cursor.getString(i); 96 } 97 matrix.addRow(row); 98 } 99 return matrix; 100 } finally { 101 cursor.close(); 102 } 103 } 104 } 105
