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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.Context;
     21 import android.content.Intent;
     22 import android.graphics.Bitmap;
     23 import android.net.Uri;
     24 import android.os.Environment;
     25 import android.provider.MediaStore;
     26 import android.util.Log;
     27 
     28 import java.io.ByteArrayOutputStream;
     29 import java.io.File;
     30 import java.io.IOException;
     31 import java.text.SimpleDateFormat;
     32 import java.util.Date;
     33 import java.util.Locale;
     34 
     35 /**
     36  * Utilities related to loading/saving contact photos.
     37  *
     38  */
     39 public class ContactPhotoUtils {
     40     private static final String TAG = "ContactPhotoUtils";
     41 
     42     private static final String PHOTO_DATE_FORMAT = "'IMG'_yyyyMMdd_HHmmss";
     43     private static final String NEW_PHOTO_DIR_PATH =
     44             Environment.getExternalStorageDirectory() + "/DCIM/Camera";
     45 
     46 
     47     /**
     48      * Generate a new, unique file to be used as an out-of-band communication
     49      * channel, since hi-res Bitmaps are too big to serialize into a Bundle.
     50      * This file will be passed to other activities (such as the gallery/camera/cropper/etc.),
     51      * and read by us once they are finished writing it.
     52      */
     53     public static File generateTempPhotoFile(Context context) {
     54         return new File(pathForCroppedPhoto(context, generateTempPhotoFileName()));
     55     }
     56 
     57     public static String pathForCroppedPhoto(Context context, String fileName) {
     58         final File dir = new File(context.getExternalCacheDir() + "/tmp");
     59         dir.mkdirs();
     60         final File f = new File(dir, fileName);
     61         return f.getAbsolutePath();
     62     }
     63 
     64     public static String pathForNewCameraPhoto(String fileName) {
     65         final File dir = new File(NEW_PHOTO_DIR_PATH);
     66         dir.mkdirs();
     67         final File f = new File(dir, fileName);
     68         return f.getAbsolutePath();
     69     }
     70 
     71     public static String generateTempPhotoFileName() {
     72         Date date = new Date(System.currentTimeMillis());
     73         SimpleDateFormat dateFormat = new SimpleDateFormat(PHOTO_DATE_FORMAT, Locale.US);
     74         return "ContactPhoto-" + dateFormat.format(date) + ".jpg";
     75     }
     76 
     77     /**
     78      * Creates a byte[] containing the PNG-compressed bitmap, or null if
     79      * something goes wrong.
     80      */
     81     public static byte[] compressBitmap(Bitmap bitmap) {
     82         final int size = bitmap.getWidth() * bitmap.getHeight() * 4;
     83         final ByteArrayOutputStream out = new ByteArrayOutputStream(size);
     84         try {
     85             bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
     86             out.flush();
     87             out.close();
     88             return out.toByteArray();
     89         } catch (IOException e) {
     90             Log.w(TAG, "Unable to serialize photo: " + e.toString());
     91             return null;
     92         }
     93     }
     94 
     95     /**
     96      * Adds common extras to gallery intents.
     97      *
     98      * @param intent The intent to add extras to.
     99      * @param croppedPhotoUri The uri of the file to save the image to.
    100      * @param photoSize The size of the photo to scale to.
    101      */
    102     public static void addGalleryIntentExtras(Intent intent, Uri croppedPhotoUri, int photoSize) {
    103         intent.putExtra("crop", "true");
    104         intent.putExtra("scale", true);
    105         intent.putExtra("scaleUpIfNeeded", true);
    106         intent.putExtra("aspectX", 1);
    107         intent.putExtra("aspectY", 1);
    108         intent.putExtra("outputX", photoSize);
    109         intent.putExtra("outputY", photoSize);
    110         intent.putExtra(MediaStore.EXTRA_OUTPUT, croppedPhotoUri);
    111     }
    112 }
    113 
    114 
    115