src/com/owncloud/android/ui/adapter/DiskLruImageCacheFileProvider.java

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   Copyright (C) 2015 Tobias Kaminsky
   5  *   Copyright (C) 2015 ownCloud Inc.
   6  *
   7  *   This program is free software: you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License version 2,
   9  *   as published by the Free Software Foundation.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  *   adapted from: http://stephendnicholas.com/archives/974
  20  *
  21  */
  22
  23 package com.owncloud.android.ui.adapter;
  24
  25 import android.accounts.Account;
  26 import android.content.ContentProvider;
  27 import android.content.ContentValues;
  28 import android.content.UriMatcher;
  29 import android.database.Cursor;
  30 import android.graphics.Bitmap;
  31 import android.net.Uri;
  32 import android.os.ParcelFileDescriptor;
  33
  34 import com.owncloud.android.MainApp;
  35 import com.owncloud.android.authentication.AccountUtils;
  36 import com.owncloud.android.datamodel.FileDataStorageManager;
  37 import com.owncloud.android.datamodel.OCFile;
  38 import com.owncloud.android.datamodel.ThumbnailsCacheManager;
  39 import com.owncloud.android.lib.common.utils.Log_OC;
  40
  41 import java.io.ByteArrayOutputStream;
  42 import java.io.File;
  43 import java.io.FileNotFoundException;
  44 import java.io.FileOutputStream;
  45 import java.io.IOException;
  46
  47 public class DiskLruImageCacheFileProvider extends ContentProvider {
  48     private static String TAG = FileDataStorageManager.class.getSimpleName();
  49
  50     public static final String AUTHORITY = "com.owncloud.imageCache.provider";
  51
  52     @Override
  53     public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
  54         Account account = AccountUtils.getCurrentOwnCloudAccount(MainApp.getAppContext());
  55         FileDataStorageManager fileDataStorageManager = new FileDataStorageManager(account,
  56                 MainApp.getAppContext().getContentResolver());
  57
  58         OCFile ocFile = fileDataStorageManager.getFileByPath(uri.getPath());
  59
  60         Bitmap thumbnail = ThumbnailsCacheManager.getBitmapFromDiskCache(
  61                 String.valueOf("r" + ocFile.getRemoteId()));
  62
  63         // create a file to write bitmap data
  64         File f = new File(MainApp.getAppContext().getCacheDir(), ocFile.getFileName());
  65         try {
  66             f.createNewFile();
  67
  68             //Convert bitmap to byte array
  69             ByteArrayOutputStream bos = new ByteArrayOutputStream();
  70             thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bos);
  71             byte[] bitmapdata = bos.toByteArray();
  72
  73             //write the bytes in file
  74             FileOutputStream fos = null;
  75             try {
  76                 fos = new FileOutputStream(f);
  77             } catch (FileNotFoundException e) {
  78                 e.printStackTrace();
  79             }
  80             fos.write(bitmapdata);
  81             fos.flush();
  82             fos.close();
  83
  84         } catch (IOException e) {
  85             e.printStackTrace();
  86         }
  87
  88         return ParcelFileDescriptor.open(f, ParcelFileDescriptor.MODE_READ_ONLY);
  89     }
  90
  91
  92     @Override
  93     public boolean onCreate() {
  94         return true;
  95     }
  96
  97     @Override
  98     public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
  99         return null;
 100     }
 101
 102     @Override
 103     public String getType(Uri uri) {
 104         return null;
 105     }
 106
 107     @Override
 108     public Uri insert(Uri uri, ContentValues values) {
 109         return null;
 110     }
 111
 112     @Override
 113     public int delete(Uri uri, String selection, String[] selectionArgs) {
 114         return 0;
 115     }
 116
 117     @Override
 118     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
 119         return 0;
 120     }
 121 }