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/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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.android.photos.data;
import android.content.Context;
import android.content.CursorLoader;
import android.database.ContentObserver;
import android.database.Cursor;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.provider.MediaStore;
import android.provider.MediaStore.Files;
import android.provider.MediaStore.Files.FileColumns;
import com.android.photos.drawables.DataUriThumbnailDrawable;
import com.android.photos.drawables.DrawableFactory;
public class PhotoSetLoader extends CursorLoader implements DrawableFactory<Cursor> {
private static final Uri CONTENT_URI = Files.getContentUri("external");
public static final String[] PROJECTION = new String[] {
FileColumns._ID,
FileColumns.DATA,
FileColumns.WIDTH,
FileColumns.HEIGHT,
FileColumns.DATE_ADDED,
FileColumns.MEDIA_TYPE,
};
private static final String SORT_ORDER = FileColumns.DATE_ADDED + " DESC";
private static final String SELECTION =
FileColumns.MEDIA_TYPE + " == " + FileColumns.MEDIA_TYPE_IMAGE
+ " OR "
+ FileColumns.MEDIA_TYPE + " == " + FileColumns.MEDIA_TYPE_VIDEO;
public static final int INDEX_ID = 0;
public static final int INDEX_DATA = 1;
public static final int INDEX_WIDTH = 2;
public static final int INDEX_HEIGHT = 3;
public static final int INDEX_DATE_ADDED = 4;
public static final int INDEX_MEDIA_TYPE = 5;
private static final Uri GLOBAL_CONTENT_URI = Uri.parse("content://" + MediaStore.AUTHORITY + "/external/");
private final ContentObserver mGlobalObserver = new ForceLoadContentObserver();
public PhotoSetLoader(Context context) {
super(context, CONTENT_URI, PROJECTION, SELECTION, null, SORT_ORDER);
}
@Override
protected void onStartLoading() {
super.onStartLoading();
getContext().getContentResolver().registerContentObserver(GLOBAL_CONTENT_URI,
true, mGlobalObserver);
}
@Override
protected void onReset() {
super.onReset();
getContext().getContentResolver().unregisterContentObserver(mGlobalObserver);
}
@Override
public Drawable drawableForItem(Cursor item, Drawable recycle) {
DataUriThumbnailDrawable drawable = null;
if (recycle == null || !(recycle instanceof DataUriThumbnailDrawable)) {
drawable = new DataUriThumbnailDrawable();
} else {
drawable = (DataUriThumbnailDrawable) recycle;
}
drawable.setImage(item.getString(INDEX_DATA),
item.getInt(INDEX_WIDTH), item.getInt(INDEX_HEIGHT));
return drawable;
}
}
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