1 /*
2  * Copyright (C) 2012 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 
18 package com.android.contacts.util;
19 
20 import android.content.ClipData;
21 import android.content.Context;
22 import android.content.Intent;
23 import android.graphics.Bitmap;
24 import android.graphics.BitmapFactory;
25 import android.net.Uri;
26 import android.provider.MediaStore;
27 import android.support.v4.content.FileProvider;
28 import android.util.Log;
29 
30 import com.android.contacts.R;
31 
32 import com.google.common.io.Closeables;
33 
34 import java.io.ByteArrayOutputStream;
35 import java.io.File;
36 import java.io.FileNotFoundException;
37 import java.io.FileOutputStream;
38 import java.io.IOException;
39 import java.io.InputStream;
40 import java.text.SimpleDateFormat;
41 import java.util.Date;
42 import java.util.Locale;
43 
44 /**
45  * Utilities related to loading/saving contact photos.
46  *
47  */
48 public class ContactPhotoUtils {
49     private static final String TAG = "ContactPhotoUtils";
50 
51     private static final String PHOTO_DATE_FORMAT = "'IMG'_yyyyMMdd_HHmmss";
52 
53     /**
54      * Generate a new, unique file to be used as an out-of-band communication
55      * channel, since hi-res Bitmaps are too big to serialize into a Bundle.
56      * This file will be passed (as a uri) to other activities (such as the gallery/camera/
57      *  cropper/etc.), and read by us once they are finished writing it.
58      */
generateTempImageUri(Context context)59     public static Uri generateTempImageUri(Context context) {
60         final String  fileProviderAuthority = context.getResources().getString(
61                 R.string.photo_file_provider_authority);
62         return FileProvider.getUriForFile(context, fileProviderAuthority,
63                 new File(pathForTempPhoto(context, generateTempPhotoFileName())));
64     }
65 
generateTempCroppedImageUri(Context context)66     public static Uri generateTempCroppedImageUri(Context context) {
67         final String  fileProviderAuthority = context.getResources().getString(
68                 R.string.photo_file_provider_authority);
69         return FileProvider.getUriForFile(context, fileProviderAuthority,
70                 new File(pathForTempPhoto(context, generateTempCroppedPhotoFileName())));
71     }
72 
pathForTempPhoto(Context context, String fileName)73     private static String pathForTempPhoto(Context context, String fileName) {
74         final File dir = context.getCacheDir();
75         dir.mkdirs();
76         final File f = new File(dir, fileName);
77         return f.getAbsolutePath();
78     }
79 
generateTempPhotoFileName()80     private static String generateTempPhotoFileName() {
81         final Date date = new Date(System.currentTimeMillis());
82         SimpleDateFormat dateFormat = new SimpleDateFormat(PHOTO_DATE_FORMAT, Locale.US);
83         return "ContactPhoto-" + dateFormat.format(date) + ".jpg";
84     }
85 
generateTempCroppedPhotoFileName()86     private static String generateTempCroppedPhotoFileName() {
87         final Date date = new Date(System.currentTimeMillis());
88         SimpleDateFormat dateFormat = new SimpleDateFormat(PHOTO_DATE_FORMAT, Locale.US);
89         return "ContactPhoto-" + dateFormat.format(date) + "-cropped.jpg";
90     }
91 
92     /**
93      * Given a uri pointing to a bitmap, reads it into a bitmap and returns it.
94      * @throws FileNotFoundException
95      */
getBitmapFromUri(Context context, Uri uri)96     public static Bitmap getBitmapFromUri(Context context, Uri uri) throws FileNotFoundException {
97         final InputStream imageStream = context.getContentResolver().openInputStream(uri);
98         try {
99             return BitmapFactory.decodeStream(imageStream);
100         } finally {
101             Closeables.closeQuietly(imageStream);
102         }
103     }
104 
105     /**
106      * Creates a byte[] containing the PNG-compressed bitmap, or null if
107      * something goes wrong.
108      */
compressBitmap(Bitmap bitmap)109     public static byte[] compressBitmap(Bitmap bitmap) {
110         final int size = bitmap.getWidth() * bitmap.getHeight() * 4;
111         final ByteArrayOutputStream out = new ByteArrayOutputStream(size);
112         try {
113             bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
114             out.flush();
115             out.close();
116             return out.toByteArray();
117         } catch (IOException e) {
118             Log.w(TAG, "Unable to serialize photo: " + e.toString());
119             return null;
120         }
121     }
122 
addCropExtras(Intent intent, int photoSize)123     public static void addCropExtras(Intent intent, int photoSize) {
124         intent.putExtra("crop", "true");
125         intent.putExtra("scale", true);
126         intent.putExtra("scaleUpIfNeeded", true);
127         intent.putExtra("aspectX", 1);
128         intent.putExtra("aspectY", 1);
129         intent.putExtra("outputX", photoSize);
130         intent.putExtra("outputY", photoSize);
131     }
132 
133     /**
134      * Adds common extras to gallery intents.
135      *
136      * @param intent The intent to add extras to.
137      * @param photoUri The uri of the file to save the image to.
138      */
addPhotoPickerExtras(Intent intent, Uri photoUri)139     public static void addPhotoPickerExtras(Intent intent, Uri photoUri) {
140         intent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
141         intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION |
142                 Intent.FLAG_GRANT_READ_URI_PERMISSION);
143         intent.setClipData(ClipData.newRawUri(MediaStore.EXTRA_OUTPUT, photoUri));
144     }
145 
146     /**
147      * Given an input photo stored in a uri, save it to a destination uri
148      */
savePhotoFromUriToUri(Context context, Uri inputUri, Uri outputUri, boolean deleteAfterSave)149     public static boolean savePhotoFromUriToUri(Context context, Uri inputUri, Uri outputUri,
150             boolean deleteAfterSave) {
151         if (inputUri == null || outputUri == null) {
152             return false;
153         }
154         try (FileOutputStream outputStream = context.getContentResolver()
155                  .openAssetFileDescriptor(outputUri, "rw").createOutputStream();
156              InputStream inputStream = context.getContentResolver().openInputStream(inputUri)) {
157 
158             final byte[] buffer = new byte[16 * 1024];
159             int length;
160             int totalLength = 0;
161             while ((length = inputStream.read(buffer)) > 0) {
162                 outputStream.write(buffer, 0, length);
163                 totalLength += length;
164             }
165             if (Log.isLoggable(TAG, Log.VERBOSE)) {
166                 Log.v(TAG, "Wrote " + totalLength + " bytes for photo " + inputUri.toString());
167             }
168         } catch (IOException | NullPointerException e) {
169             Log.e(TAG, "Failed to write photo: " + inputUri.toString() + " because: " + e);
170             return false;
171         } finally {
172             if (deleteAfterSave) {
173                 context.getContentResolver().delete(inputUri, null, null);
174             }
175         }
176         return true;
177     }
178 }
179