163d2846409d84487d4856d3b8d18cc4684352e29Steve McKay/* 263d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * Copyright 2017 The Android Open Source Project 363d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * 463d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * Licensed under the Apache License, Version 2.0 (the "License"); 563d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * you may not use this file except in compliance with the License. 663d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * You may obtain a copy of the License at 763d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * 863d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * http://www.apache.org/licenses/LICENSE-2.0 963d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * 1063d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * Unless required by applicable law or agreed to in writing, software 1163d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * distributed under the License is distributed on an "AS IS" BASIS, 1263d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1363d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * See the License for the specific language governing permissions and 1463d2846409d84487d4856d3b8d18cc4684352e29Steve McKay * limitations under the License. 1563d2846409d84487d4856d3b8d18cc4684352e29Steve McKay */ 1663d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 1763d2846409d84487d4856d3b8d18cc4684352e29Steve McKaypackage com.example.android.supportv7.widget.selection.fancy; 1863d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 19ac5fe7c617c66850fff75a9fce9979c6e5674b0fAurimas Liutikasimport static androidx.core.util.Preconditions.checkArgument; 2063d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 2163d2846409d84487d4856d3b8d18cc4684352e29Steve McKayimport android.content.Context; 2263d2846409d84487d4856d3b8d18cc4684352e29Steve McKayimport android.net.Uri; 2363d2846409d84487d4856d3b8d18cc4684352e29Steve McKayimport android.view.LayoutInflater; 2463d2846409d84487d4856d3b8d18cc4684352e29Steve McKayimport android.view.View; 2563d2846409d84487d4856d3b8d18cc4684352e29Steve McKayimport android.view.ViewGroup; 2663d2846409d84487d4856d3b8d18cc4684352e29Steve McKayimport android.widget.LinearLayout; 2763d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 282a32c7e1264b14a20ed900abadea828b804a46ceAurimas Liutikasimport androidx.recyclerview.selection.ItemKeyProvider; 292a32c7e1264b14a20ed900abadea828b804a46ceAurimas Liutikasimport androidx.recyclerview.selection.SelectionTracker; 30def582a5836579a3fadabfdbe4413cb1652bf098Aurimas Liutikasimport androidx.recyclerview.widget.RecyclerView; 31def582a5836579a3fadabfdbe4413cb1652bf098Aurimas Liutikas 32def582a5836579a3fadabfdbe4413cb1652bf098Aurimas Liutikasimport com.example.android.supportv7.Cheeses; 33def582a5836579a3fadabfdbe4413cb1652bf098Aurimas Liutikasimport com.example.android.supportv7.R; 3463d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 3563d2846409d84487d4856d3b8d18cc4684352e29Steve McKayfinal class FancySelectionDemoAdapter extends RecyclerView.Adapter<FancyHolder> { 3663d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 3783f7464907e288099c0f2d3014d69acf6e571d16Steve McKay private final ContentUriKeyProvider mKeyProvider; 3863d2846409d84487d4856d3b8d18cc4684352e29Steve McKay private final Context mContext; 3963d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 4063d2846409d84487d4856d3b8d18cc4684352e29Steve McKay // This should be replaced at "bind" time with a real test that 417fb763509e07f98d650efc25c91bff8b1cb239acSteve McKay // asks SelectionTracker. 4263d2846409d84487d4856d3b8d18cc4684352e29Steve McKay private SelectionTest mSelTest; 4363d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 4463d2846409d84487d4856d3b8d18cc4684352e29Steve McKay FancySelectionDemoAdapter(Context context) { 4563d2846409d84487d4856d3b8d18cc4684352e29Steve McKay mContext = context; 4663d2846409d84487d4856d3b8d18cc4684352e29Steve McKay mKeyProvider = new ContentUriKeyProvider("cheeses", Cheeses.sCheeseStrings); 4763d2846409d84487d4856d3b8d18cc4684352e29Steve McKay mSelTest = new SelectionTest() { 4863d2846409d84487d4856d3b8d18cc4684352e29Steve McKay @Override 4963d2846409d84487d4856d3b8d18cc4684352e29Steve McKay public boolean isSelected(Uri id) { 5063d2846409d84487d4856d3b8d18cc4684352e29Steve McKay throw new IllegalStateException( 517fb763509e07f98d650efc25c91bff8b1cb239acSteve McKay "Adapter must be initialized with SelectionTracker."); 5263d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 5363d2846409d84487d4856d3b8d18cc4684352e29Steve McKay }; 5463d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 5563d2846409d84487d4856d3b8d18cc4684352e29Steve McKay // In the fancy edition of selection support we supply access to stable 5663d2846409d84487d4856d3b8d18cc4684352e29Steve McKay // ids using content URI. Since we can map between position and selection key 5763d2846409d84487d4856d3b8d18cc4684352e29Steve McKay // at will we get fancy dependent functionality like band selection and range support. 5863d2846409d84487d4856d3b8d18cc4684352e29Steve McKay setHasStableIds(false); 5963d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 6063d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 6163d2846409d84487d4856d3b8d18cc4684352e29Steve McKay ItemKeyProvider<Uri> getItemKeyProvider() { 6263d2846409d84487d4856d3b8d18cc4684352e29Steve McKay return mKeyProvider; 6363d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 6463d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 657fb763509e07f98d650efc25c91bff8b1cb239acSteve McKay // Glue together SelectionTracker and the adapter. 667fb763509e07f98d650efc25c91bff8b1cb239acSteve McKay public void bindSelectionHelper(final SelectionTracker<Uri> selectionTracker) { 677fb763509e07f98d650efc25c91bff8b1cb239acSteve McKay checkArgument(selectionTracker != null); 6863d2846409d84487d4856d3b8d18cc4684352e29Steve McKay mSelTest = new SelectionTest() { 6963d2846409d84487d4856d3b8d18cc4684352e29Steve McKay @Override 7063d2846409d84487d4856d3b8d18cc4684352e29Steve McKay public boolean isSelected(Uri id) { 717fb763509e07f98d650efc25c91bff8b1cb239acSteve McKay return selectionTracker.isSelected(id); 7263d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 7363d2846409d84487d4856d3b8d18cc4684352e29Steve McKay }; 7463d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 7563d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 7663d2846409d84487d4856d3b8d18cc4684352e29Steve McKay void loadData() { 7763d2846409d84487d4856d3b8d18cc4684352e29Steve McKay onDataReady(); 7863d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 7963d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 8063d2846409d84487d4856d3b8d18cc4684352e29Steve McKay private void onDataReady() { 8163d2846409d84487d4856d3b8d18cc4684352e29Steve McKay notifyDataSetChanged(); 8263d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 8363d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 8463d2846409d84487d4856d3b8d18cc4684352e29Steve McKay @Override 8563d2846409d84487d4856d3b8d18cc4684352e29Steve McKay public int getItemCount() { 8663d2846409d84487d4856d3b8d18cc4684352e29Steve McKay return Cheeses.sCheeseStrings.length; 8763d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 8863d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 8963d2846409d84487d4856d3b8d18cc4684352e29Steve McKay @Override 9063d2846409d84487d4856d3b8d18cc4684352e29Steve McKay public long getItemId(int position) { 9163d2846409d84487d4856d3b8d18cc4684352e29Steve McKay return position; 9263d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 9363d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 9463d2846409d84487d4856d3b8d18cc4684352e29Steve McKay @Override 9563d2846409d84487d4856d3b8d18cc4684352e29Steve McKay public void onBindViewHolder(FancyHolder holder, int position) { 9663d2846409d84487d4856d3b8d18cc4684352e29Steve McKay Uri uri = mKeyProvider.getKey(position); 9763d2846409d84487d4856d3b8d18cc4684352e29Steve McKay holder.update(uri, uri.getLastPathSegment(), mSelTest.isSelected(uri)); 9863d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 9963d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 10063d2846409d84487d4856d3b8d18cc4684352e29Steve McKay @Override 10163d2846409d84487d4856d3b8d18cc4684352e29Steve McKay public FancyHolder onCreateViewHolder(ViewGroup parent, int viewType) { 10263d2846409d84487d4856d3b8d18cc4684352e29Steve McKay LinearLayout layout = inflateLayout(mContext, parent, R.layout.selection_demo_list_item); 10363d2846409d84487d4856d3b8d18cc4684352e29Steve McKay return new FancyHolder(layout); 10463d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 10563d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 10663d2846409d84487d4856d3b8d18cc4684352e29Steve McKay @SuppressWarnings("TypeParameterUnusedInFormals") // Convenience to avoid clumsy cast. 10763d2846409d84487d4856d3b8d18cc4684352e29Steve McKay private static <V extends View> V inflateLayout( 10863d2846409d84487d4856d3b8d18cc4684352e29Steve McKay Context context, ViewGroup parent, int layout) { 10963d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 11063d2846409d84487d4856d3b8d18cc4684352e29Steve McKay return (V) LayoutInflater.from(context).inflate(layout, parent, false); 11163d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 11263d2846409d84487d4856d3b8d18cc4684352e29Steve McKay 11363d2846409d84487d4856d3b8d18cc4684352e29Steve McKay private interface SelectionTest { 11463d2846409d84487d4856d3b8d18cc4684352e29Steve McKay boolean isSelected(Uri id); 11563d2846409d84487d4856d3b8d18cc4684352e29Steve McKay } 11663d2846409d84487d4856d3b8d18cc4684352e29Steve McKay} 117