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         Log_OC.d(TAG, "try to send: " + uri);
  72
  73         OCFile ocFile = getFile(uri);
  74
  75         Bitmap thumbnail = ThumbnailsCacheManager.getBitmapFromDiskCache(
  76                 String.valueOf("r" + ocFile.getRemoteId()));
  77
  78         // create a file to write bitmap data
  79         File f = new File(MainApp.getAppContext().getCacheDir(), ocFile.getFileName());
  80         try {
  81             f.createNewFile();
  82
  83             //Convert bitmap to byte array
  84             ByteArrayOutputStream bos = new ByteArrayOutputStream();
  85             thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bos);
  86             byte[] bitmapdata = bos.toByteArray();
  87
  88             //write the bytes in file
  89             FileOutputStream fos = null;
  90             try {
  91                 fos = new FileOutputStream(f);
  92             } catch (FileNotFoundException e) {
  93                 e.printStackTrace();
  94             }
  95             fos.write(bitmapdata);
  96             fos.flush();
  97             fos.close();
  98
  99         } catch (IOException e) {
 100             e.printStackTrace();
 101         }
 102
 103         return ParcelFileDescriptor.open(f, ParcelFileDescriptor.MODE_READ_ONLY);
 104     }
 105
 106     @Override
 107     public String getType(Uri uri) {
 108         OCFile ocFile = getFile(uri);
 109         return ocFile.getMimetype();
 110     }
 111
 112     @Override
 113     public Cursor query(Uri uri, String[] arg1, String arg2, String[] arg3, String arg4) {
 114         MatrixCursor cursor = null;
 115
 116         OCFile ocFile = getFile(uri);
 117         File file = new File(MainApp.getAppContext().getCacheDir(), ocFile.getFileName());
 118         if (file.exists()) {
 119             cursor = new MatrixCursor(new String[] {
 120                     OpenableColumns.DISPLAY_NAME, OpenableColumns.SIZE });
 121             cursor.addRow(new Object[] { uri.getLastPathSegment(),
 122                     file.length() });
 123         }
 124
 125         return cursor;
 126     }
 127
 128     @Override
 129     public Uri insert(Uri uri, ContentValues values) {
 130         return null;
 131     }
 132
 133     @Override
 134     public int delete(Uri uri, String selection, String[] selectionArgs) {
 135         return 0;
 136     }
 137
 138     @Override
 139     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
 140         return 0;
 141     }
 142 }