Can't create a directory on /storage/emulated/0 on emulator

Question

I'm trying to create a directory on my android emulator but I can't do it, I already have the permission on manifest write_storage, and I get no erros but mkdir() return false, I verify if external storage is writtable too and it is, it works on physical devices my code:

 /// Cria uma nova pasta para colocar o backup
    File direct = new File(Environment.getExternalStorageDirectory(),
            "/Financas RW Backup");
    try {


        if (!direct.exists()) {
            if(isExternalStorageWritable()&&isExternalStorageReadable()) {
              if(  direct.mkdir()) {
                  fachada.showMessage(ExportImportDB.this," Criado");
              }else{
                  fachada.showMessage(ExportImportDB.this," Não Criado");
              }
            }
        }
    } catch (Exception e) {
        fachada.showMessage(this, e.toString());
    }

use mkdirs(); it will create parent folders if its not there; but mkdir wont create and hence it will return false — DJphy, Mar 18 '16 at 12:56
okay do this; Environment.getExternalStorageDirectory().getAbsolutePath(), +"ur custom"; — DJphy, Mar 18 '16 at 12:59
@DJphy it does not work when I debug it the path is the same /storage/emulated/0/Financas RW Backup — Renan Willamy, Mar 18 '16 at 13:12
@g2o this is my config android { compileSdkVersion 23 buildToolsVersion "23.0.2" defaultConfig { applicationId ".....financasrw" minSdkVersion 14 targetSdkVersion 23 versionCode 1 versionName "1.0" } — Renan Willamy, Mar 18 '16 at 13:14
i hope you have permission in the manifest file for the SdCard. — Silvans Solanki, Mar 18 '16 at 13:16
check on another real time device; i think the phone ur checking has some problem; i gues :D — DJphy, Mar 18 '16 at 13:19
As I said it works perfect on phisical devices, and permission that I have is — Renan Willamy, Mar 18 '16 at 13:21
If my help was valuable please don't forget to mark the question as solved ;) — Gueorgui Obregon, Mar 18 '16 at 13:33

score 11 · Accepted Answer · edited May 23 '17 at 11:54

11

You have to options:

Downgrade your compileSdkVersion and targetSdkVersion to lower version in your build.gradle
Request write permission at runtime is required on Android 6 .

I personally don't advice the first one. For more info check:

Hope this helps!!

edited May 23 '17 at 11:54

Community

1
1

answered Mar 18 '16 at 13:25

Gueorgui Obregon

5,077
3
33
57

The problem is the version of android, and I tryed with a lower version and works! – Renan Willamy Mar 18 '16 at 13:52
1

Request permission works; we should get a warning in console about this. – Martin B Jul 13 '17 at 22:56
Android Studio 3.1 and still no warning. – Juan José Melero Gómez Mar 28 '18 at 14:05

score 5 · Answer 2 · answered Mar 09 '21 at 09:41

I had the same problem with Android 10. I solved it by adding android:requestLegacyExternalStorage="true" to my <application> element in the manifest

Note: We can also use context.getExternalFilesDir(Environment.DIRECTORY_PICTURES). There are other directory type constants in Environment like DIRECTORY_MUSIC, DIRECTORY_MOVIES etc.

score -1 · Answer 3 · answered Jul 14 '16 at 16:14

-1

I had a similar issue was fixed by using mkdirs instead of mkdir

answered Jul 14 '16 at 16:14

Shane Murphy

389
3
6

Can't create a directory on /storage/emulated/0 on emulator

3 Answers3

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