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.providerBeta";
  51
  52     @Override
  53     public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
  54         Log_OC.d(TAG, "try to send: " + uri);
  55         Account account = AccountUtils.getCurrentOwnCloudAccount(MainApp.getAppContext());
  56         FileDataStorageManager fileDataStorageManager = new FileDataStorageManager(account,
  57                 MainApp.getAppContext().getContentResolver());
  58
  59         OCFile ocFile = fileDataStorageManager.getFileByPath(uri.getPath());
  60
  61         Bitmap thumbnail = ThumbnailsCacheManager.getBitmapFromDiskCache(
  62                 String.valueOf("r" + ocFile.getRemoteId()));
  63
  64         // create a file to write bitmap data
  65         File f = new File(MainApp.getAppContext().getCacheDir(), ocFile.getFileName());
  66         try {
  67             f.createNewFile();
  68
  69             //Convert bitmap to byte array
  70             ByteArrayOutputStream bos = new ByteArrayOutputStream();
  71             thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bos);
  72             byte[] bitmapdata = bos.toByteArray();
  73
  74             //write the bytes in file
  75             FileOutputStream fos = null;
  76             try {
  77                 fos = new FileOutputStream(f);
  78             } catch (FileNotFoundException e) {
  79                 e.printStackTrace();
  80             }
  81             fos.write(bitmapdata);
  82             fos.flush();
  83             fos.close();
  84
  85         } catch (IOException e) {
  86             e.printStackTrace();
  87         }
  88
  89         return ParcelFileDescriptor.open(f, ParcelFileDescriptor.MODE_READ_ONLY);
  90     }
  91
  92
  93     @Override
  94     public boolean onCreate() {
  95         return true;
  96     }
  97
  98     @Override
  99     public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
 100         return null;
 101     }
 102
 103     @Override
 104     public String getType(Uri uri) {
 105         return null;
 106     }
 107
 108     @Override
 109     public Uri insert(Uri uri, ContentValues values) {
 110         return null;
 111     }
 112
 113     @Override
 114     public int delete(Uri uri, String selection, String[] selectionArgs) {
 115         return 0;
 116     }
 117
 118     @Override
 119     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
 120         return 0;
 121     }
 122 }