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.database.MatrixCursor;
  31 import android.graphics.Bitmap;
  32 import android.net.Uri;
  33 import android.os.ParcelFileDescriptor;
  34 import android.provider.OpenableColumns;
  35
  36 import com.owncloud.android.MainApp;
  37 import com.owncloud.android.authentication.AccountUtils;
  38 import com.owncloud.android.datamodel.FileDataStorageManager;
  39 import com.owncloud.android.datamodel.OCFile;
  40 import com.owncloud.android.datamodel.ThumbnailsCacheManager;
  41 import com.owncloud.android.lib.common.utils.Log_OC;
  42
  43 import java.io.ByteArrayOutputStream;
  44 import java.io.File;
  45 import java.io.FileNotFoundException;
  46 import java.io.FileOutputStream;
  47 import java.io.IOException;
  48
  49 public class DiskLruImageCacheFileProvider extends ContentProvider {
  50     private static String TAG = FileDataStorageManager.class.getSimpleName();
  51     private FileDataStorageManager mFileDataStorageManager;
  52
  53     public static final String AUTHORITY = "org.owncloud.beta.imageCache.provider";
  54
  55     @Override
  56     public boolean onCreate() {
  57         return true;
  58     }
  59
  60     private OCFile getFile(Uri uri){
  61         Account account = AccountUtils.getCurrentOwnCloudAccount(MainApp.getAppContext());
  62         mFileDataStorageManager = new FileDataStorageManager(account,
  63                 MainApp.getAppContext().getContentResolver());
  64
  65         OCFile ocFile = mFileDataStorageManager.getFileByPath(uri.getPath());
  66         return ocFile;
  67     }
  68
  69     @Override
  70     public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
  71         OCFile ocFile = getFile(uri);
  72
  73         Bitmap thumbnail = ThumbnailsCacheManager.getBitmapFromDiskCache(
  74                 String.valueOf("r" + ocFile.getRemoteId()));
  75
  76         // create a file to write bitmap data
  77         File f = new File(MainApp.getAppContext().getCacheDir(), ocFile.getFileName());
  78         try {
  79             f.createNewFile();
  80
  81             //Convert bitmap to byte array
  82             ByteArrayOutputStream bos = new ByteArrayOutputStream();
  83             thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bos);
  84             byte[] bitmapdata = bos.toByteArray();
  85
  86             //write the bytes in file
  87             FileOutputStream fos = null;
  88             try {
  89                 fos = new FileOutputStream(f);
  90             } catch (FileNotFoundException e) {
  91                 e.printStackTrace();
  92             }
  93             fos.write(bitmapdata);
  94             fos.flush();
  95             fos.close();
  96
  97         } catch (IOException e) {
  98             e.printStackTrace();
  99         }
 100
 101         return ParcelFileDescriptor.open(f, ParcelFileDescriptor.MODE_READ_ONLY);
 102     }
 103
 104     @Override
 105     public String getType(Uri uri) {
 106         OCFile ocFile = getFile(uri);
 107         return ocFile.getMimetype();
 108     }
 109
 110     @Override
 111     public Cursor query(Uri uri, String[] arg1, String arg2, String[] arg3, String arg4) {
 112         MatrixCursor cursor = null;
 113
 114         OCFile ocFile = getFile(uri);
 115         File file = new File(MainApp.getAppContext().getCacheDir(), ocFile.getFileName());
 116         if (file.exists()) {
 117             cursor = new MatrixCursor(new String[] {
 118                     OpenableColumns.DISPLAY_NAME, OpenableColumns.SIZE });
 119             cursor.addRow(new Object[] { uri.getLastPathSegment(),
 120                     file.length() });
 121         }
 122
 123         return cursor;
 124     }
 125
 126     @Override
 127     public Uri insert(Uri uri, ContentValues values) {
 128         return null;
 129     }
 130
 131     @Override
 132     public int delete(Uri uri, String selection, String[] selectionArgs) {
 133         return 0;
 134     }
 135
 136     @Override
 137     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
 138         return 0;
 139     }
 140 }