| /* |
| * Copyright (C) 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.internal.widget; |
| |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapFactory; |
| import android.graphics.drawable.BitmapDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.net.Uri; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| /** |
| * A class to extract Bitmaps from a MessagingStyle message. |
| */ |
| public class LocalImageResolver { |
| |
| private static final int MAX_SAFE_ICON_SIZE_PX = 480; |
| |
| @Nullable |
| public static Drawable resolveImage(Uri uri, Context context) throws IOException { |
| BitmapFactory.Options onlyBoundsOptions = getBoundsOptionsForImage(uri, context); |
| if ((onlyBoundsOptions.outWidth == -1) || (onlyBoundsOptions.outHeight == -1)) { |
| return null; |
| } |
| |
| int originalSize = |
| (onlyBoundsOptions.outHeight > onlyBoundsOptions.outWidth) |
| ? onlyBoundsOptions.outHeight |
| : onlyBoundsOptions.outWidth; |
| |
| double ratio = (originalSize > MAX_SAFE_ICON_SIZE_PX) |
| ? (originalSize / MAX_SAFE_ICON_SIZE_PX) |
| : 1.0; |
| |
| BitmapFactory.Options bitmapOptions = new BitmapFactory.Options(); |
| bitmapOptions.inSampleSize = getPowerOfTwoForSampleRatio(ratio); |
| InputStream input = context.getContentResolver().openInputStream(uri); |
| Bitmap bitmap = BitmapFactory.decodeStream(input, null, bitmapOptions); |
| input.close(); |
| return new BitmapDrawable(context.getResources(), bitmap); |
| } |
| |
| private static BitmapFactory.Options getBoundsOptionsForImage(Uri uri, Context context) |
| throws IOException { |
| InputStream input = context.getContentResolver().openInputStream(uri); |
| BitmapFactory.Options onlyBoundsOptions = new BitmapFactory.Options(); |
| onlyBoundsOptions.inJustDecodeBounds = true; |
| BitmapFactory.decodeStream(input, null, onlyBoundsOptions); |
| input.close(); |
| return onlyBoundsOptions; |
| } |
| |
| private static int getPowerOfTwoForSampleRatio(double ratio) { |
| int k = Integer.highestOneBit((int) Math.floor(ratio)); |
| return Math.max(1, k); |
| } |
| } |