1 /* 2 * Copyright (C) 2016 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 package com.android.devcamera; 17 18 import android.content.ContentResolver; 19 import android.content.ContentValues; 20 import android.content.Context; 21 import android.content.SharedPreferences; 22 import android.os.SystemClock; 23 import android.provider.MediaStore; 24 import android.util.Log; 25 26 import java.io.File; 27 import java.io.FileOutputStream; 28 import java.io.IOException; 29 import java.io.OutputStream; 30 31 /** 32 * This class has methods required to save a JPEG to disk as well as update the 33 * MediaStore database. 34 */ 35 36 37 public class MediaSaver { 38 private static final String TAG = "Snappy_MediaSaver"; 39 private static final String MY_PREFS_NAME = "SnappyPrefs"; 40 41 // MediaStore is slow/broken 42 private static final boolean UDPATE_MEDIA_STORE = true; 43 44 getNextInt(Context context)45 public static int getNextInt(Context context) { 46 SharedPreferences prefs = context.getSharedPreferences(MY_PREFS_NAME, Context.MODE_PRIVATE); 47 int i = prefs.getInt("counter", 1); 48 SharedPreferences.Editor editor = prefs.edit(); 49 editor.putInt("counter", i+1); 50 editor.commit(); 51 return i; 52 } 53 54 /** 55 * @param context Application context. 56 * @param jpegData JPEG byte stream. 57 */ saveJpeg(Context context, byte[] jpegData, ContentResolver resolver)58 public static String saveJpeg(Context context, byte[] jpegData, ContentResolver resolver) { 59 String filename = ""; 60 try { 61 File file; 62 while (true) { 63 int i = getNextInt(context); 64 filename = String.format("/sdcard/DCIM/Camera/SNAP_%05d.JPG", i); 65 file = new File(filename); 66 if (file.createNewFile()) { 67 break; 68 } 69 } 70 71 long t0 = SystemClock.uptimeMillis(); 72 OutputStream os = new FileOutputStream(file); 73 os.write(jpegData); 74 os.flush(); 75 os.close(); 76 long t1 = SystemClock.uptimeMillis(); 77 78 // update MediaStore so photos apps can find photos right away. 79 if (UDPATE_MEDIA_STORE) { 80 // really slow for some reason: MediaStore.Images.Media.insertImage(resolver, file.getAbsolutePath(), file.getName(), file.getName()); 81 insertImage(resolver, file); 82 } 83 long t2 = SystemClock.uptimeMillis(); 84 85 Log.v(TAG, String.format("Wrote JPEG %d bytes as %s in %.3f seconds; mediastore update = %.3f secs", 86 jpegData.length, file, (t1 - t0) * 0.001, (t2 - t1) * 0.001) ); 87 } catch (IOException e) { 88 Log.e(TAG, "Error creating new file: ", e); 89 } 90 return filename; 91 } 92 93 94 // We use this instead of MediaStore.Images.Media.insertImage() because we want to add date metadata insertImage(ContentResolver cr, File file)95 public static void insertImage(ContentResolver cr, File file) { 96 97 ContentValues values = new ContentValues(); 98 values.put(MediaStore.Images.Media.TITLE, file.getName()); 99 values.put(MediaStore.Images.Media.DISPLAY_NAME, file.getName()); 100 values.put(MediaStore.Images.Media.DESCRIPTION, file.getName()); 101 values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg"); 102 values.put(MediaStore.Images.Media.DATA, file.getAbsolutePath()); 103 // Add the date meta data to ensure the image is added at the front of the gallery 104 values.put(MediaStore.Images.Media.DATE_ADDED, System.currentTimeMillis()); 105 values.put(MediaStore.Images.Media.DATE_TAKEN, System.currentTimeMillis()); 106 107 try { 108 cr.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values); 109 } catch (Exception e) { 110 Log.w(TAG, "Error updating media store for " + file, e); 111 } 112 } 113 114 } 115