1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 package com.example.android.leanback; 15 16 import android.content.Context; 17 import android.graphics.drawable.Drawable; 18 import android.support.v17.leanback.widget.ImageCardView; 19 import android.support.v17.leanback.widget.Presenter; 20 import android.text.TextUtils; 21 import android.util.Log; 22 import android.view.ViewGroup; 23 import android.view.View.MeasureSpec; 24 import android.view.ViewGroup.LayoutParams; 25 import android.widget.TextView; 26 27 import java.util.Random; 28 29 public class CardPresenter extends Presenter { 30 private static final String TAG = "CardPresenter"; 31 32 private static final int IMAGE_HEIGHT_DP = 120; 33 34 private static Random sRand = new Random(); 35 private static int sRowHeight = 0; 36 private static int sExpandedRowHeight = 0; 37 setupRowHeights(Context context)38 private static void setupRowHeights(Context context) { 39 if (sRowHeight == 0) { 40 float density = context.getResources().getDisplayMetrics().density; 41 int height = (int) (IMAGE_HEIGHT_DP * density + 0.5f); 42 43 ImageCardView v = new ImageCardView(context); 44 v.setMainImageDimensions(LayoutParams.WRAP_CONTENT, height); 45 v.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED); 46 sRowHeight = v.getMeasuredHeight(); 47 v.setActivated(true); 48 v.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED); 49 sExpandedRowHeight = v.getMeasuredHeight(); 50 } 51 } 52 getRowHeight(Context context)53 public static int getRowHeight(Context context) { 54 setupRowHeights(context); 55 return sRowHeight; 56 } 57 getExpandedRowHeight(Context context)58 public static int getExpandedRowHeight(Context context) { 59 setupRowHeights(context); 60 return sExpandedRowHeight; 61 } 62 63 @Override onCreateViewHolder(ViewGroup parent)64 public ViewHolder onCreateViewHolder(ViewGroup parent) { 65 Log.d(TAG, "onCreateViewHolder"); 66 ImageCardView v = new ImageCardView(parent.getContext()); 67 v.setFocusable(true); 68 v.setFocusableInTouchMode(true); 69 // Randomly makes image view crop as a square or just stretch to original 70 // aspect ratio. 71 if (sRand.nextBoolean()) { 72 v.setMainImageAdjustViewBounds(false); 73 v.setMainImageDimensions(getRowHeight(parent.getContext()), 74 getRowHeight(parent.getContext())); 75 } else { 76 v.setMainImageAdjustViewBounds(true); 77 v.setMainImageDimensions(LayoutParams.WRAP_CONTENT, 78 getRowHeight(parent.getContext())); 79 } 80 return new ViewHolder(v); 81 } 82 83 @Override onBindViewHolder(ViewHolder viewHolder, Object item)84 public void onBindViewHolder(ViewHolder viewHolder, Object item) { 85 Log.d(TAG, "onBindViewHolder for " + item.toString()); 86 PhotoItem photoItem = (PhotoItem) item; 87 Drawable drawable = viewHolder.view.getContext().getResources() 88 .getDrawable(photoItem.getImageResourceId()); 89 ((ImageCardView) viewHolder.view).setMainImage(drawable); 90 ((ImageCardView) viewHolder.view).setTitleText(photoItem.getTitle()); 91 if (!TextUtils.isEmpty(photoItem.getContent())) { 92 ((ImageCardView) viewHolder.view).setContentText(photoItem.getContent()); 93 } 94 } 95 96 @Override onUnbindViewHolder(ViewHolder viewHolder)97 public void onUnbindViewHolder(ViewHolder viewHolder) { 98 Log.d(TAG, "onUnbindViewHolder"); 99 } 100 } 101