Android 6 0 Marshmallow Cannot write to SD Card

Question

I have an app that uses external storage to store photographs  As required  in its manifest  the following permissions are requested   lt uses-permission android name  android permission CAMERA    gt   lt uses-permission android name  android permission WRITE EXTERNAL STORAGE    gt    and it uses the following to retrieve the required directory  File sdDir   Environment              getExternalStoragePublicDirectory Environment DIRECTORY PICTURES    SimpleDateFormat dateFormat   new SimpleDateFormat  MM-dd   Locale US   String date   dateFormat format new Date     storageDir   new File sdDir  getResources   getString              R string storagedir                 -    date       Create directory  error handling if   storageDir exists    amp  amp   storageDir mkdirs           fails here   The app works fine on Android 5 1 to 2 3  it has been on Google Play for over a year   Following an upgrade of one of my testing phones  Android One  to 6  it s now returning an error when trying to create the requisite directory    sdcard Pictures myapp-yy-mm    The sd card is configured as  Portable storage   I ve formatted the sd card  I ve replaced it  I ve rebooted  All to no avail   Also  the built-in android screenshot functionality  via Power Lower volume  is failing  due to limited storage space  or it isn t allowed by the app or your organisation    Any ideas

User · Answer

Right  So I ve finally got to the bottom of the problem  it was a botched in-place OTA upgrade   My suspicions intensified after my Garmin Fenix 2 wasn t able to connect via bluetooth and after googling  Marshmallow upgrade issues   Anyway  a  Factory reset  fixed the issue    Surprisingly  the reset did not return the phone to the original Kitkat  instead  the wipe process picked up the OTA downloaded 6 0 upgrade package and ran with it  resulting  I guess  in a  cleaner  upgrade   Of course  this meant that the phone lost all the apps that I d installed  But  freshly installed apps  including mine  work without any changes  i e  there is backward compatibility   Whew

User · Answer

I faced the same problem  There are two types of permissions in Android    Dangerous  access to contacts  write to external storage     Normal   Normal permissions are automatically approved by Android while dangerous permissions need to be approved by Android users   Here is the strategy to get dangerous permissions in Android 6 0   Check if you have the permission granted If your app is already granted the permission  go ahead and perform normally  If your app doesn t have the permission yet  ask for user to approve Listen to user approval in onRequestPermissionsResult   Here is my case  I need to write to external storage   First  I check if I have the permission       private static final int REQUEST WRITE STORAGE   112      boolean hasPermission    ContextCompat checkSelfPermission activity              Manifest permission WRITE EXTERNAL STORAGE     PackageManager PERMISSION GRANTED   if   hasPermission        ActivityCompat requestPermissions parentActivity                  new String   Manifest permission WRITE EXTERNAL STORAGE                   REQUEST WRITE STORAGE       Then check the user s approval    Override public void onRequestPermissionsResult int requestCode  String   permissions  int   grantResults        super onRequestPermissionsResult requestCode  permissions  grantResults       switch  requestCode                case REQUEST WRITE STORAGE                if  grantResults length  gt  0  amp  amp  grantResults 0     PackageManager PERMISSION GRANTED                                  reload my activity with permission granted or use the features what required the permission               else                               Toast makeText parentActivity   The app was not allowed to write to your storage  Hence  it cannot function properly  Please consider granting it this permission   Toast LENGTH LONG  show                                       You can read more about the new permission model here  https   developer android com training permissions requesting html

User · Answer

First i will give you Dangerous Permission List in Android M and Later version     Then give you example of how to request for permission in Android M and later version   I ask user to WRITE EXTERNAL STORAGE permission    First add permission in your android menifest file  Step 1 Declare requestcode   private static String TAG    PermissionDemo    private static final int REQUEST WRITE STORAGE   112     Step 2 Add this code when you want ask user for permission      ask for the permission in android M     int permission   ContextCompat checkSelfPermission this              Manifest permission WRITE EXTERNAL STORAGE        if  permission    PackageManager PERMISSION GRANTED            Log i TAG   Permission to record denied             if  ActivityCompat shouldShowRequestPermissionRationale this                  Manifest permission WRITE EXTERNAL STORAGE                 AlertDialog Builder builder   new AlertDialog Builder this               builder setMessage  Permission to access the SD-CARD is required for this app to Download PDF                         setTitle  Permission required                 builder setPositiveButton  OK   new DialogInterface OnClickListener                      public void onClick DialogInterface dialog  int id                        Log i TAG   Clicked                        makeRequest                                                   AlertDialog dialog   builder create                dialog show               else               makeRequest                         protected void makeRequest             ActivityCompat requestPermissions this                  new String   Manifest permission WRITE EXTERNAL STORAGE                   REQUEST WRITE STORAGE           Step 3 Add override method for Request    Override public void onRequestPermissionsResult int requestCode                                         String permissions    int   grantResults        switch  requestCode            case REQUEST WRITE STORAGE                 if  grantResults length    0                        grantResults 0                         PackageManager PERMISSION GRANTED                     Log i TAG   Permission has been denied by user                   else                    Log i TAG   Permission has been granted by user                               return                      Note  Do not forget to add permission in menifest file   BEST EXAMPLE BELOW WITH MULTIPLE PERMISSION PLUS COVER ALL SCENARIO  I added comments so you can easily understand   import android Manifest  import android content DialogInterface  import android content Intent  import android content pm PackageManager  import android net Uri  import android provider Settings  import android support annotation NonNull  import android support v4 app ActivityCompat  import android support v4 content ContextCompat  import android support v7 app AlertDialog  import android support v7 app AppCompatActivity  import android os Bundle  import android view View  import android widget Button  import android widget Toast   import com production hometech busycoder R   import java util ArrayList   public class PermissionInActivity extends AppCompatActivity implements View OnClickListener        private static final int REQUEST PERMISSION SETTING   99      private Button bt camera      private static final String   PARAMS TAKE PHOTO                 Manifest permission CAMERA              Manifest permission WRITE EXTERNAL STORAGE            private static final int RESULT PARAMS TAKE PHOTO   11        Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity permission in            bt camera    Button  findViewById R id bt camera            bt camera setOnClickListener this                Override     public void onClick View view             switch  view getId                   case R id bt camera                   takePhoto                     break                                    shouldShowRequestPermissionRationale     This will return true if the user had previously declined to grant you permission        NOTE    that ActivityCompat also has a backwards-compatible implementation of        shouldShowRequestPermissionRationale    so you can avoid your own API level        checks          lt p gt         shouldShowRequestPermissionRationale      returns false if the user declined the permission and checked the checkbox to ask you to stop pestering the        user          lt p gt         requestPermissions     request for the permisssiion             private void takePhoto              if  canTakePhoto                   Toast makeText this   You can take PHOTO   Toast LENGTH SHORT  show               else if  ActivityCompat shouldShowRequestPermissionRationale this  Manifest permission CAMERA     ActivityCompat shouldShowRequestPermissionRationale this  Manifest permission WRITE EXTERNAL STORAGE                  Toast makeText this   You should give permission   Toast LENGTH SHORT  show                ActivityCompat requestPermissions this  netPermisssion PARAMS TAKE PHOTO   RESULT PARAMS TAKE PHOTO              else               ActivityCompat requestPermissions this  netPermisssion PARAMS TAKE PHOTO   RESULT PARAMS TAKE PHOTO                             This method return  permission denied String   so we can request again     private String   netPermisssion String   wantedPermissions            ArrayList lt String gt  result   new ArrayList lt  gt              for  String permission   wantedPermissions                if   hasPermission permission                     result add permission                                    return  result toArray new String result size                   private boolean canTakePhoto             return  hasPermission Manifest permission CAMERA   amp  amp  hasPermission Manifest permission WRITE EXTERNAL STORAGE                          checkSelfPermission     you can check if you have been granted a runtime permission or not        ex   ContextCompat checkSelfPermission this permissionString    PackageManager PERMISSION GRANTED         lt p gt         ContextCompat offers a backwards-compatible implementation of checkSelfPermission    ActivityCompat offers a backwards-compatible        implementation of requestPermissions   that you can use                 param permissionString         return             private boolean hasPermission String permissionString            return  ContextCompat checkSelfPermission this  permissionString     PackageManager PERMISSION GRANTED                         requestPermissions   action goes to onRequestPermissionsResult   whether user can GARNT or DENIED those permisssions                param requestCode         param permissions         param grantResults              Override     public void onRequestPermissionsResult int requestCode   NonNull String   permissions   NonNull int   grantResults            super onRequestPermissionsResult requestCode  permissions  grantResults            if  requestCode    RESULT PARAMS TAKE PHOTO                 if  canTakePhoto                       Toast makeText this   You can take picture   Toast LENGTH SHORT  show                   else if    ActivityCompat shouldShowRequestPermissionRationale this  Manifest permission CAMERA     ActivityCompat shouldShowRequestPermissionRationale this  Manifest permission WRITE EXTERNAL STORAGE                        final AlertDialog Builder settingDialog   new AlertDialog Builder PermissionInActivity this                   settingDialog setTitle  Permissioin                    settingDialog setMessage  Now you need to enable permisssion from the setting because without permission this app won t run properly  n n  goto - gt  setting - gt  appInfo                    settingDialog setCancelable false                    settingDialog setPositiveButton  Setting   new DialogInterface OnClickListener                          Override                     public void onClick DialogInterface dialogInterface  int i                             dialogInterface cancel                             Intent intent   new Intent Settings ACTION APPLICATION DETAILS SETTINGS                           Uri uri   Uri fromParts  package   getPackageName    null                           intent setData uri                           startActivityForResult intent  REQUEST PERMISSION SETTING                           Toast makeText getBaseContext     Go to Permissions to Grant all permission ENABLE   Toast LENGTH LONG  show                                                               settingDialog show                     Toast makeText this   You need to grant permission from setting   Toast LENGTH SHORT  show                                           Override     protected void onActivityResult int requestCode  int resultCode  Intent data            super onActivityResult requestCode  resultCode  data            if  requestCode    REQUEST PERMISSION SETTING                 if  canTakePhoto                       Toast makeText this   You can take PHOTO   Toast LENGTH SHORT  show                                           Special Case for Configuration change  It is possible that the user will rotate the device or otherwise trigger a configuration change while our permission dialog is in the foreground  Since our activity is still visible behind that dialog  we get destroyed and recreated    but we do not want to re-raise the permission dialog again   That is why we have a boolean  named isInPermission  that tracks whether or not we are in the middle of requesting permissions  We hold onto that value in onSaveInstanceState      Override protected void onSaveInstanceState Bundle outState      super onSaveInstanceState outState     outState putBoolean STATE IN PERMISSION  isInPermission       We restore it in onCreate    If we do not hold all of the desired permissions  but isInPermission is true  we skip requesting the permissions  since we are in the middle of doing so already

User · Answer

Maybe you cannot use manifest class from generated code in your project  So  you can use manifest class from android sdk  android Manifest permission WRITE EXTERNAL STORAGE   But in Marsmallow version have 2 permission must grant are WRITE and READ EXTERNAL STORAGE in storage category  See my program  my program will request permission until user choose yes and do something after permissions is granted               if  Build VERSION SDK INT  gt   23                    if  ContextCompat checkSelfPermission LoginActivity this  android Manifest permission WRITE EXTERNAL STORAGE                             PackageManager PERMISSION GRANTED    ContextCompat checkSelfPermission LoginActivity this  android Manifest permission READ EXTERNAL STORAGE                             PackageManager PERMISSION GRANTED                        ActivityCompat requestPermissions LoginActivity this                              new String   android Manifest permission WRITE EXTERNAL STORAGE  android Manifest permission READ EXTERNAL STORAGE                               1                     else                         do something                                 else                         do something

User · Answer

Android changed how permissions work with Android 6 0 that s the reason for your errors  You have to actually request and check if the permission was granted by user to use  So permissions in manifest file will only work for api below 21  Check this link for a snippet of how permissions are requested in api23 http   android-developers blogspot nl 2015 09 google-play-services-81-and-android-60 html m 1  Code -  If  ActivityCompat checkSelfPermission MainActivity this  Manifest permission READ EXTERNAL STORAGE                     PackageManager PERMISSION GRANTED                ActivityCompat requestPermissions MainActivity this  new String   Manifest permission READ EXTERNAL STORAGE   STORAGE PERMISSION RC               return                  Override     public void onRequestPermissionsResult int requestCode   NonNull String   permissions   NonNull int   grantResults            super onRequestPermissionsResult requestCode  permissions  grantResults           if  requestCode    STORAGE PERMISSION RC                if  grantResults 0     PackageManager PERMISSION GRANTED                      permission granted  start reading               else                   Toast makeText this   No permission to read external storage    Toast LENGTH SHORT  show

User · Answer

Android Documentation on Manifest permission Manifest permission WRITE EXTERNAL STORAGE states      Starting in API level 19  this permission is not required to read write files in your application-specific directories returned by getExternalFilesDir String  and getExternalCacheDir        I think that this means you do not have to code for the run-time implementation of the WRITE EXTERNAL STORAGE permission unless the app is writing to a directory that is not specific to your app   You can define the max sdk version in the manifest per permission like     lt uses-permission android name  android permission WRITE EXTERNAL STORAGE  android maxSdkVersion  19    gt    Also make sure to change the target SDK in the build graddle and not the manifest  the gradle settings will always overwrite the manifest settings   android   compileSdkVersion 23 buildToolsVersion  23 0 1  defaultConfig       minSdkVersion 17     targetSdkVersion 22

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