Java tutorial
/* * Copyright (C) 2014 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 home.ned.lul; import android.graphics.drawable.Drawable; import android.support.v17.leanback.widget.ImageCardView; import android.support.v17.leanback.widget.Presenter; import android.support.v4.content.ContextCompat; import android.support.v4.content.res.ResourcesCompat; import android.util.Log; import android.view.ViewGroup; import com.bumptech.glide.Glide; /* * A CardPresenter is used to generate Views and bind Objects to them on demand. * It contains an Image CardView */ public class CardPresenter extends Presenter { private static final String TAG = "CardPresenter"; private static final int CARD_WIDTH = 313; private static final int CARD_HEIGHT = 176; private static int sSelectedBackgroundColor; private static int sDefaultBackgroundColor; private Drawable mDefaultCardImage; @Override public ViewHolder onCreateViewHolder(ViewGroup parent) { Log.d(TAG, "onCreateViewHolder"); sDefaultBackgroundColor = parent.getResources().getColor(R.color.default_background); sSelectedBackgroundColor = parent.getResources().getColor(R.color.selected_background); mDefaultCardImage = parent.getResources().getDrawable(R.drawable.movie); ImageCardView cardView = new ImageCardView(parent.getContext()) { @Override public void setSelected(boolean selected) { updateCardBackgroundColor(this, selected, 0); super.setSelected(selected); } }; cardView.setFocusable(true); cardView.setFocusableInTouchMode(true); updateCardBackgroundColor(cardView, false, 0); return new ViewHolder(cardView); } private static void updateCardBackgroundColor(ImageCardView view, boolean selected, int c) { int color; if (c == 0) { color = selected ? sSelectedBackgroundColor : sDefaultBackgroundColor; } else { color = c; } // Both background colors should be set because the view's background is temporarily visible // during animations. view.setBackgroundColor(color); view.findViewById(R.id.info_field).setBackgroundColor(color); } @Override public void onBindViewHolder(Presenter.ViewHolder viewHolder, Object item) { Movie movie = (Movie) item; ImageCardView cardView = (ImageCardView) viewHolder.view; Log.d(TAG, "onBindViewHolder"); if (movie.getCardImageUrl() != null) { cardView.setTitleText(movie.getTitle()); cardView.setContentText(movie.getStudio()); cardView.setMainImageDimensions(CARD_WIDTH, CARD_HEIGHT); cardView.setMainImage(ContextCompat.getDrawable(viewHolder.view.getContext(), R.drawable.app_icon)); // Glide.with(viewHolder.view.getContext()) // .load(movie.getCardImageUrl()) // .centerCrop() // .error(mDefaultCardImage) // .into(cardView.getMainImageView()); } } @Override public void onUnbindViewHolder(Presenter.ViewHolder viewHolder) { Log.d(TAG, "onUnbindViewHolder"); ImageCardView cardView = (ImageCardView) viewHolder.view; // Remove references to images so that the garbage collector can free up memory cardView.setBadgeImage(null); cardView.setMainImage(null); } }