content: /*******************************************************************************
   * Software Name : RCS IMS Stack
   *
   * Copyright (C) 2010-2016 Orange.
   *
   * 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.gsma.rcs.utils;
  
  import android.os.Environment;
  import android.os.StatFs;
  
  /**
   * Storage utility functions
   * 
   * @author Deutsche Telekom AG
   */
  public class StorageUtils {
  
      /**
       * Verify if external storage is available (read or write) using {@link Environment} external
       * storage state
       * 
       * @see Environment#MEDIA_MOUNTED
       * @see Environment#MEDIA_MOUNTED_READ_ONLY
       * @return <code>true</code> if available, otherwise <code>false</code>
       */
      public static boolean hasExternalStorage() {
          String state = Environment.getExternalStorageState();
          return Environment.MEDIA_MOUNTED.equals(state)
                  || Environment.MEDIA_MOUNTED_READ_ONLY.equals(state);
      }
  
      /**
       * Get available space in external storage, only if external storage is ready to write
       * 
       * @return Available space in bytes, otherwise <code>-1</code>
       */
      public static long getExternalStorageFreeSpace() {
          long freeSpace = -1;
          if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
              StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath());
              long blockSize = stat.getBlockSize();
              long availableBlocks = stat.getAvailableBlocks();
              freeSpace = blockSize * availableBlocks;
          }
          return freeSpace;
      }
  }
  