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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.devcamera;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.SystemClock;
import android.provider.MediaStore;
import android.util.Log;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* This class has methods required to save a JPEG to disk as well as update the
* MediaStore database.
*/
public class MediaSaver {
private static final String TAG = "Snappy_MediaSaver";
private static final String MY_PREFS_NAME = "SnappyPrefs";
// MediaStore is slow/broken
private static final boolean UDPATE_MEDIA_STORE = true;
public static int getNextInt(Context context) {
SharedPreferences prefs = context.getSharedPreferences(MY_PREFS_NAME, Context.MODE_PRIVATE);
int i = prefs.getInt("counter", 1);
SharedPreferences.Editor editor = prefs.edit();
editor.putInt("counter", i+1);
editor.commit();
return i;
}
/**
* @param context Application context.
* @param jpegData JPEG byte stream.
*/
public static String saveJpeg(Context context, byte[] jpegData, ContentResolver resolver) {
String filename = "";
try {
File file;
while (true) {
int i = getNextInt(context);
filename = String.format("/sdcard/DCIM/Camera/SNAP_%05d.JPG", i);
file = new File(filename);
if (file.createNewFile()) {
break;
}
}
long t0 = SystemClock.uptimeMillis();
OutputStream os = new FileOutputStream(file);
os.write(jpegData);
os.flush();
os.close();
long t1 = SystemClock.uptimeMillis();
// update MediaStore so photos apps can find photos right away.
if (UDPATE_MEDIA_STORE) {
// really slow for some reason: MediaStore.Images.Media.insertImage(resolver, file.getAbsolutePath(), file.getName(), file.getName());
insertImage(resolver, file);
}
long t2 = SystemClock.uptimeMillis();
Log.v(TAG, String.format("Wrote JPEG %d bytes as %s in %.3f seconds; mediastore update = %.3f secs",
jpegData.length, file, (t1 - t0) * 0.001, (t2 - t1) * 0.001) );
} catch (IOException e) {
Log.e(TAG, "Error creating new file: ", e);
}
return filename;
}
// We use this instead of MediaStore.Images.Media.insertImage() because we want to add date metadata
public static void insertImage(ContentResolver cr, File file) {
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, file.getName());
values.put(MediaStore.Images.Media.DISPLAY_NAME, file.getName());
values.put(MediaStore.Images.Media.DESCRIPTION, file.getName());
values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
values.put(MediaStore.Images.Media.DATA, file.getAbsolutePath());
// Add the date meta data to ensure the image is added at the front of the gallery
values.put(MediaStore.Images.Media.DATE_ADDED, System.currentTimeMillis());
values.put(MediaStore.Images.Media.DATE_TAKEN, System.currentTimeMillis());
try {
cr.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
} catch (Exception e) {
Log.w(TAG, "Error updating media store for " + file, e);
}
}
}
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