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