1 /* 2 * Copyright 2014, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.managedprovisioning.common; 18 19 import android.annotation.NonNull; 20 import android.content.Context; 21 import android.graphics.Bitmap; 22 import android.graphics.BitmapFactory; 23 import android.graphics.PorterDuff; 24 import android.graphics.drawable.BitmapDrawable; 25 import android.graphics.drawable.Drawable; 26 import android.net.Uri; 27 28 import com.android.internal.annotations.VisibleForTesting; 29 import com.android.managedprovisioning.R; 30 31 import java.io.File; 32 33 public class LogoUtils { 34 @VisibleForTesting static final int DEFAULT_LOGO_ID = R.drawable.ic_enterprise_blue_24dp; 35 saveOrganisationLogo(Context context, Uri uri)36 public static void saveOrganisationLogo(Context context, Uri uri) { 37 final File logoFile = getOrganisationLogoFile(context); 38 StoreUtils.copyUriIntoFile(context.getContentResolver(), uri, logoFile); 39 } 40 41 /** 42 * @param colorTint optional color colorTint to apply to the logo 43 */ getOrganisationLogo(Context context, Integer colorTint)44 public static @NonNull Drawable getOrganisationLogo(Context context, Integer colorTint) { 45 final File logoFile = getOrganisationLogoFile(context); 46 Bitmap bitmap = null; 47 int maxWidth = (int) context.getResources().getDimension(R.dimen.max_logo_width); 48 int maxHeight = (int) context.getResources().getDimension(R.dimen.max_logo_height); 49 if (logoFile.exists()) { 50 bitmap = getBitmapPartiallyResized(logoFile.getPath(), maxWidth, maxHeight); 51 if (bitmap == null) { 52 ProvisionLogger.loge("Could not get organisation logo from " + logoFile); 53 } 54 } 55 56 if (bitmap != null) { 57 return new BitmapDrawable(context.getResources(), 58 resizeBitmap(bitmap, maxWidth, maxHeight)); 59 } 60 61 // fall back to a default logo 62 Drawable organisationLogo = context.getDrawable(DEFAULT_LOGO_ID); 63 if (colorTint != null) { 64 organisationLogo.setColorFilter(colorTint, PorterDuff.Mode.SRC_ATOP); 65 } 66 return organisationLogo; 67 } 68 69 /** 70 * Decodes a bitmap from an input stream. 71 * If the actual dimensions of the bitmap are larger than the desired ones, will try to return a 72 * subsample. 73 * The point of using this method is that the entire image may be too big to fit entirely in 74 * memmory. Since we may not need the entire image anyway, it's better to only decode a 75 * subsample when possible. 76 */ 77 @VisibleForTesting getBitmapPartiallyResized(String filePath, int maxDesiredWidth, int maxDesiredHeight)78 static Bitmap getBitmapPartiallyResized(String filePath, int maxDesiredWidth, 79 int maxDesiredHeight) { 80 BitmapFactory.Options bounds = new BitmapFactory.Options(); 81 // Firstly, let's just get the dimensions of the image. 82 bounds.inJustDecodeBounds = true; 83 BitmapFactory.decodeFile(filePath, bounds); 84 int streamWidth = bounds.outWidth; 85 int streamHeight = bounds.outHeight; 86 int ratio = Math.max(streamWidth / maxDesiredWidth, streamHeight / maxDesiredHeight); 87 if (ratio > 1) { 88 // Decodes a smaller bitmap. Note that this ratio will be rounded down to the nearest 89 // power of 2. The decoded bitmap will not have the expected size, but we'll do another 90 // round of scaling. 91 bounds.inSampleSize = ratio; 92 } 93 bounds.inJustDecodeBounds = false; 94 // Now, decode the actual bitmap 95 return BitmapFactory.decodeFile(filePath, bounds); 96 } 97 98 /* 99 * Returns a new Bitmap with the specified maximum width and height. Does scaling if 100 * necessary. Keeps the ratio of the original image. 101 */ 102 @VisibleForTesting resizeBitmap(Bitmap bitmap, int maxWidth, int maxHeight)103 static Bitmap resizeBitmap(Bitmap bitmap, int maxWidth, int maxHeight) { 104 int width = bitmap.getWidth(); 105 int height = bitmap.getHeight(); 106 double ratio = Math.max((double) width / maxWidth, (double) height / maxHeight); 107 // We don't scale up. 108 if (ratio > 1) { 109 width /= ratio; 110 height /= ratio; 111 bitmap = Bitmap.createScaledBitmap(bitmap, width, height, false); 112 } 113 return bitmap; 114 } 115 cleanUp(Context context)116 public static void cleanUp(Context context) { 117 getOrganisationLogoFile(context).delete(); 118 } 119 getOrganisationLogoFile(Context context)120 private static File getOrganisationLogoFile(Context context) { 121 return new File(context.getFilesDir() + File.separator + "organisation_logo"); 122 } 123 } 124