| /* |
| * Copyright (C) 2011 Google Inc. |
| * Licensed to 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.ex.photo.adapters; |
| |
| import android.content.Context; |
| import android.content.Intent; |
| import android.database.Cursor; |
| import androidx.fragment.app.Fragment; |
| import androidx.collection.SimpleArrayMap; |
| |
| import com.android.ex.photo.Intents; |
| import com.android.ex.photo.Intents.PhotoViewIntentBuilder; |
| import com.android.ex.photo.fragments.PhotoViewFragment; |
| import com.android.ex.photo.provider.PhotoContract.PhotoViewColumns; |
| import com.android.ex.photo.provider.PhotoContract.PhotoQuery; |
| |
| /** |
| * Pager adapter for the photo view |
| */ |
| public class PhotoPagerAdapter extends BaseCursorPagerAdapter { |
| protected SimpleArrayMap<String, Integer> mColumnIndices = |
| new SimpleArrayMap<String, Integer>(PhotoQuery.PROJECTION.length); |
| protected final float mMaxScale; |
| protected boolean mDisplayThumbsFullScreen; |
| |
| public PhotoPagerAdapter( |
| Context context, androidx.fragment.app.FragmentManager fm, Cursor c, |
| float maxScale, boolean thumbsFullScreen) { |
| super(context, fm, c); |
| mMaxScale = maxScale; |
| mDisplayThumbsFullScreen = thumbsFullScreen; |
| } |
| |
| @Override |
| public Fragment getItem(Context context, Cursor cursor, int position) { |
| final String photoUri = getPhotoUri(cursor); |
| final String thumbnailUri = getThumbnailUri(cursor); |
| final String contentDescription = getPhotoName(cursor); |
| boolean loading = shouldShowLoadingIndicator(cursor); |
| boolean onlyShowSpinner = false; |
| if(photoUri == null && loading) { |
| onlyShowSpinner = true; |
| } |
| |
| // create new PhotoViewFragment |
| final PhotoViewIntentBuilder builder = |
| Intents.newPhotoViewFragmentIntentBuilder(mContext, getPhotoViewFragmentClass()); |
| builder |
| .setResolvedPhotoUri(photoUri) |
| .setThumbnailUri(thumbnailUri) |
| .setContentDescription(contentDescription) |
| .setDisplayThumbsFullScreen(mDisplayThumbsFullScreen) |
| .setMaxInitialScale(mMaxScale); |
| |
| return createPhotoViewFragment(builder.build(), position, onlyShowSpinner); |
| } |
| |
| protected Class<? extends PhotoViewFragment> getPhotoViewFragmentClass() { |
| return PhotoViewFragment.class; |
| } |
| |
| protected PhotoViewFragment createPhotoViewFragment( |
| Intent intent, int position, boolean onlyShowSpinner) { |
| return PhotoViewFragment.newInstance(intent, position, onlyShowSpinner); |
| } |
| |
| @Override |
| public Cursor swapCursor(Cursor newCursor) { |
| mColumnIndices.clear(); |
| |
| if (newCursor != null) { |
| for(String column : PhotoQuery.PROJECTION) { |
| mColumnIndices.put(column, newCursor.getColumnIndexOrThrow(column)); |
| } |
| |
| for(String column : PhotoQuery.OPTIONAL_COLUMNS) { |
| int index = newCursor.getColumnIndex(column); |
| if (index != -1) { |
| mColumnIndices.put(column, index); |
| } |
| } |
| } |
| |
| return super.swapCursor(newCursor); |
| } |
| |
| public String getPhotoUri(Cursor cursor) { |
| return getString(cursor, PhotoViewColumns.CONTENT_URI); |
| } |
| |
| public String getThumbnailUri(Cursor cursor) { |
| return getString(cursor, PhotoViewColumns.THUMBNAIL_URI); |
| } |
| |
| public String getContentType(Cursor cursor) { |
| return getString(cursor, PhotoViewColumns.CONTENT_TYPE); |
| } |
| |
| public String getPhotoName(Cursor cursor) { |
| return getString(cursor, PhotoViewColumns.NAME); |
| } |
| |
| public boolean shouldShowLoadingIndicator(Cursor cursor) { |
| String value = getString(cursor, PhotoViewColumns.LOADING_INDICATOR); |
| if (value == null) { |
| return false; |
| } else { |
| return Boolean.parseBoolean(value); |
| } |
| } |
| |
| private String getString(Cursor cursor, String column) { |
| if (mColumnIndices.containsKey(column)) { |
| return cursor.getString(mColumnIndices.get(column)); |
| } else { |
| return null; |
| } |
| } |
| } |