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
18package com.android.contacts.util;
19
20import android.content.Context;
21import android.content.Intent;
22import android.graphics.Bitmap;
23import android.net.Uri;
24import android.os.Environment;
25import android.provider.MediaStore;
26import android.util.Log;
27
28import java.io.ByteArrayOutputStream;
29import java.io.File;
30import java.io.IOException;
31import java.text.SimpleDateFormat;
32import java.util.Date;
33
34/**
35 * Utilities related to loading/saving contact photos.
36 *
37 */
38public class ContactPhotoUtils {
39    private static final String TAG = "ContactPhotoUtils";
40
41    private static final String PHOTO_DATE_FORMAT = "'IMG'_yyyyMMdd_HHmmss";
42    private static final String NEW_PHOTO_DIR_PATH =
43            Environment.getExternalStorageDirectory() + "/DCIM/Camera";
44
45
46    /**
47     * Generate a new, unique file to be used as an out-of-band communication
48     * channel, since hi-res Bitmaps are too big to serialize into a Bundle.
49     * This file will be passed to other activities (such as the gallery/camera/cropper/etc.),
50     * and read by us once they are finished writing it.
51     */
52    public static File generateTempPhotoFile(Context context) {
53        return new File(pathForCroppedPhoto(context, generateTempPhotoFileName()));
54    }
55
56    public static String pathForCroppedPhoto(Context context, String fileName) {
57        final File dir = new File(context.getExternalCacheDir() + "/tmp");
58        dir.mkdirs();
59        final File f = new File(dir, fileName);
60        return f.getAbsolutePath();
61    }
62
63    public static String pathForNewCameraPhoto(String fileName) {
64        final File dir = new File(NEW_PHOTO_DIR_PATH);
65        dir.mkdirs();
66        final File f = new File(dir, fileName);
67        return f.getAbsolutePath();
68    }
69
70    public static String generateTempPhotoFileName() {
71        Date date = new Date(System.currentTimeMillis());
72        SimpleDateFormat dateFormat = new SimpleDateFormat(PHOTO_DATE_FORMAT);
73        return "ContactPhoto-" + dateFormat.format(date) + ".jpg";
74    }
75
76    /**
77     * Creates a byte[] containing the PNG-compressed bitmap, or null if
78     * something goes wrong.
79     */
80    public static byte[] compressBitmap(Bitmap bitmap) {
81        final int size = bitmap.getWidth() * bitmap.getHeight() * 4;
82        final ByteArrayOutputStream out = new ByteArrayOutputStream(size);
83        try {
84            bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
85            out.flush();
86            out.close();
87            return out.toByteArray();
88        } catch (IOException e) {
89            Log.w(TAG, "Unable to serialize photo: " + e.toString());
90            return null;
91        }
92    }
93
94    /**
95     * Adds common extras to gallery intents.
96     *
97     * @param intent The intent to add extras to.
98     * @param croppedPhotoUri The uri of the file to save the image to.
99     * @param photoSize The size of the photo to scale to.
100     */
101    public static void addGalleryIntentExtras(Intent intent, Uri croppedPhotoUri, int photoSize) {
102        intent.putExtra("crop", "true");
103        intent.putExtra("scale", true);
104        intent.putExtra("scaleUpIfNeeded", true);
105        intent.putExtra("aspectX", 1);
106        intent.putExtra("aspectY", 1);
107        intent.putExtra("outputX", photoSize);
108        intent.putExtra("outputY", photoSize);
109        intent.putExtra(MediaStore.EXTRA_OUTPUT, croppedPhotoUri);
110    }
111}
112
113
114