android/src/com/mapswithme/util/StorageUtils.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47

package com.mapswithme.util;

import android.content.Context;
import android.os.Environment;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

import com.mapswithme.maps.MwmApplication;
import com.mapswithme.util.log.Logger;
import com.mapswithme.util.log.SimpleLogger;

import java.io.File;

public class StorageUtils
{
  /**
   * Checks if external storage is available for read and write
   *
   * @return true if external storage is mounted and ready for reading/writing
   */
  private static boolean isExternalStorageWritable()
  {
    String state = Environment.getExternalStorageState();
    return Environment.MEDIA_MOUNTED.equals(state);
  }

  /**
   * Safely returns the external files directory path with the preliminary
   * checking the availability of the mentioned directory
   *
   * @return the absolute path of external files directory or null if directory can not be obtained
   * @see Context#getExternalFilesDir(String)
   */
  @Nullable
  public static String getExternalFilesDir()
  {
    if (!isExternalStorageWritable())
      return null;

    File dir = MwmApplication.get().getExternalFilesDir(null);
    if (dir != null)
      return dir.getAbsolutePath();

    SimpleLogger.get().e("Cannot get the external files directory for some reasons", new Throwable());
    return null;
  }
}