Java tutorial
/* * Copyright (C) 2014 nohana, Inc. * * 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.laevatein.internal.loader; import com.laevatein.internal.entity.Album; import com.laevatein.internal.entity.Item; import android.content.Context; import android.database.Cursor; import android.database.MatrixCursor; import android.database.MergeCursor; import android.net.Uri; import android.provider.MediaStore; import android.support.v4.content.CursorLoader; import jp.mixi.compatibility.android.provider.MediaStoreCompat; /** * @author KeithYokoma * @since 2014/03/27 * @version 1.0.0 * @hide */ public class AlbumPhotoLoader extends CursorLoader { public static final String TAG = AlbumPhotoLoader.class.getSimpleName(); private static final String[] PROJECTION = { MediaStore.Images.Media._ID, MediaStore.Images.Media.DISPLAY_NAME }; private static final String ORDER_BY = MediaStore.Images.Media._ID + " DESC"; private final boolean mEnableCapture; public AlbumPhotoLoader(Context context, Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder, boolean capture) { super(context, uri, projection, selection, selectionArgs, sortOrder); mEnableCapture = capture; } public static CursorLoader newInstance(Context context, Album album) { if (album.isAll()) { return new AlbumPhotoLoader(context, MediaStore.Images.Media.EXTERNAL_CONTENT_URI, PROJECTION, null, null, ORDER_BY, false); } return newInstance(context, album, false); } public static CursorLoader newInstance(Context context, Album album, boolean capture) { return new AlbumPhotoLoader(context, MediaStore.Images.Media.EXTERNAL_CONTENT_URI, PROJECTION, MediaStore.Images.Media.BUCKET_ID + " = ?", new String[] { album.getId() }, ORDER_BY, capture); } @Override public Cursor loadInBackground() { Cursor result = super.loadInBackground(); if (!mEnableCapture || !MediaStoreCompat.hasCameraFeature(getContext())) { return result; } MatrixCursor dummy = new MatrixCursor(PROJECTION); dummy.addRow(new Object[] { Item.ITEM_ID_CAPTURE, Item.ITEM_DISPLAY_NAME_CAPTURE }); return new MergeCursor(new Cursor[] { dummy, result }); } }