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      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.os.Environment;
     27 import android.provider.MediaStore;
     28 import android.support.v4.content.FileProvider;
     29 import android.util.Log;
     30 
     31 import com.android.contacts.R;
     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      */
     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 
     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 
     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 
     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 
     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      */
     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      */
    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 
    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      */
    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      */
    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             Log.v(TAG, "Wrote " + totalLength + " bytes for photo " + inputUri.toString());
    166         } catch (IOException | NullPointerException e) {
    167             Log.e(TAG, "Failed to write photo: " + inputUri.toString() + " because: " + e);
    168             return false;
    169         } finally {
    170             if (deleteAfterSave) {
    171                 context.getContentResolver().delete(inputUri, null, null);
    172             }
    173         }
    174         return true;
    175     }
    176 }
    177