| /* |
| * Copyright 2018 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.support.mediarouter.app; |
| |
| import android.content.Context; |
| import android.graphics.Bitmap; |
| import android.graphics.Canvas; |
| import android.graphics.Rect; |
| import android.graphics.drawable.BitmapDrawable; |
| import android.util.DisplayMetrics; |
| import android.util.TypedValue; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.ArrayAdapter; |
| import android.widget.ListView; |
| |
| import com.android.media.update.ApiHelper; |
| import com.android.media.update.R; |
| |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| final class MediaRouteDialogHelper { |
| /** |
| * The framework should set the dialog width properly, but somehow it doesn't work, hence |
| * duplicating a similar logic here to determine the appropriate dialog width. |
| */ |
| public static int getDialogWidth(Context context) { |
| DisplayMetrics metrics = ApiHelper.getLibResources(context).getDisplayMetrics(); |
| boolean isPortrait = metrics.widthPixels < metrics.heightPixels; |
| |
| TypedValue value = new TypedValue(); |
| ApiHelper.getLibResources(context).getValue(isPortrait |
| ? R.dimen.mr_dialog_fixed_width_minor |
| : R.dimen.mr_dialog_fixed_width_major, value, true); |
| if (value.type == TypedValue.TYPE_DIMENSION) { |
| return (int) value.getDimension(metrics); |
| } else if (value.type == TypedValue.TYPE_FRACTION) { |
| return (int) value.getFraction(metrics.widthPixels, metrics.widthPixels); |
| } |
| return ViewGroup.LayoutParams.WRAP_CONTENT; |
| } |
| |
| /** |
| * Compares two lists regardless of order. |
| * |
| * @param list1 A list |
| * @param list2 A list to be compared with {@code list1} |
| * @return True if two lists have exactly same items regardless of order, false otherwise. |
| */ |
| public static <E> boolean listUnorderedEquals(List<E> list1, List<E> list2) { |
| HashSet<E> set1 = new HashSet<>(list1); |
| HashSet<E> set2 = new HashSet<>(list2); |
| return set1.equals(set2); |
| } |
| |
| /** |
| * Compares two lists and returns a set of items which exist |
| * after-list but before-list, which means newly added items. |
| * |
| * @param before A list |
| * @param after A list to be compared with {@code before} |
| * @return A set of items which contains newly added items while |
| * comparing {@code after} to {@code before}. |
| */ |
| public static <E> Set<E> getItemsAdded(List<E> before, List<E> after) { |
| HashSet<E> set = new HashSet<>(after); |
| set.removeAll(before); |
| return set; |
| } |
| |
| /** |
| * Compares two lists and returns a set of items which exist |
| * before-list but after-list, which means removed items. |
| * |
| * @param before A list |
| * @param after A list to be compared with {@code before} |
| * @return A set of items which contains removed items while |
| * comparing {@code after} to {@code before}. |
| */ |
| public static <E> Set<E> getItemsRemoved(List<E> before, List<E> after) { |
| HashSet<E> set = new HashSet<>(before); |
| set.removeAll(after); |
| return set; |
| } |
| |
| /** |
| * Generates an item-Rect map which indicates where member |
| * items are located in the given ListView. |
| * |
| * @param listView A list view |
| * @param adapter An array adapter which contains an array of items. |
| * @return A map of items and bounds of their views located in the given list view. |
| */ |
| public static <E> HashMap<E, Rect> getItemBoundMap(ListView listView, |
| ArrayAdapter<E> adapter) { |
| HashMap<E, Rect> itemBoundMap = new HashMap<>(); |
| int firstVisiblePosition = listView.getFirstVisiblePosition(); |
| for (int i = 0; i < listView.getChildCount(); ++i) { |
| int position = firstVisiblePosition + i; |
| E item = adapter.getItem(position); |
| View view = listView.getChildAt(i); |
| itemBoundMap.put(item, |
| new Rect(view.getLeft(), view.getTop(), view.getRight(), view.getBottom())); |
| } |
| return itemBoundMap; |
| } |
| |
| /** |
| * Generates an item-BitmapDrawable map which stores snapshots |
| * of member items in the given ListView. |
| * |
| * @param context A context |
| * @param listView A list view |
| * @param adapter An array adapter which contains an array of items. |
| * @return A map of items and snapshots of their views in the given list view. |
| */ |
| public static <E> HashMap<E, BitmapDrawable> getItemBitmapMap(Context context, |
| ListView listView, ArrayAdapter<E> adapter) { |
| HashMap<E, BitmapDrawable> itemBitmapMap = new HashMap<>(); |
| int firstVisiblePosition = listView.getFirstVisiblePosition(); |
| for (int i = 0; i < listView.getChildCount(); ++i) { |
| int position = firstVisiblePosition + i; |
| E item = adapter.getItem(position); |
| View view = listView.getChildAt(i); |
| itemBitmapMap.put(item, getViewBitmap(context, view)); |
| } |
| return itemBitmapMap; |
| } |
| |
| private static BitmapDrawable getViewBitmap(Context context, View view) { |
| Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), |
| Bitmap.Config.ARGB_8888); |
| Canvas canvas = new Canvas(bitmap); |
| view.draw(canvas); |
| return new BitmapDrawable(context.getResources(), bitmap); |
| } |
| } |