Crash in MediaDetailPagerFragment while downloading images

[ashishkumar468]

Summary:
App Crashes when we try to download an image in MediaDetails page (Probable cause is the lack of external storage permission)

Steps to reproduce:

How can we reproduce the issue?
Download an image in MediaDetails Page without external storage permission

System logs:

CUSTOM_DATA=
STACK_TRACE=java.lang.SecurityException: No permission to write to /storage/emulated/0/Download/Cruz de Doendó.jpg: Neither user 10252 nor current process has android.permission.WRITE_EXTERNAL_STORAGE.
at android.os.Parcel.readException(Parcel.java:1951)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:183)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135)
at android.content.ContentProviderProxy.insert(ContentProviderNative.java:476)
at android.content.ContentResolver.insert(ContentResolver.java:1550)
at android.app.DownloadManager.enqueue(DownloadManager.java:1041)
at fr.free.nrw.commons.media.MediaDetailPagerFragment.downloadMedia(MediaDetailPagerFragment.java:252)
at fr.free.nrw.commons.media.MediaDetailPagerFragment.onOptionsItemSelected(MediaDetailPagerFragment.java:185)
at android.support.v4.app.Fragment.performOptionsItemSelected(Fragment.java:2476)
at android.support.v4.app.FragmentManagerImpl.dispatchOptionsItemSelected(FragmentManager.java:3343)
at android.support.v4.app.Fragment.performOptionsItemSelected(Fragment.java:2481)
at android.support.v4.app.FragmentManagerImpl.dispatchOptionsItemSelected(FragmentManager.java:3343)
at android.support.v4.app.FragmentController.dispatchOptionsItemSelected(FragmentController.java:347)
at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:413)
at android.support.v7.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.java:195)
at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:108)
at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:108)
at android.support.v7.app.ToolbarActionBar$2.onMenuItemClick(ToolbarActionBar.java:63)
at android.support.v7.widget.Toolbar$1.onMenuItemClick(Toolbar.java:203)
at android.support.v7.widget.ActionMenuView$MenuBuilderCallback.onMenuItemSelected(ActionMenuView.java:780)
at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:822)
at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:171)
at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:973)
at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:963)
at android.support.v7.widget.ActionMenuView.invokeItem(ActionMenuView.java:624)
at android.support.v7.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:150)
at android.view.View.performClick(View.java:6277)
at android.view.View$PerformClick.run(View.java:24765)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6797)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:772)

Device and Android version:
ANDROID_VERSION=8.0.0
APP_VERSION_NAME=2.10.2
BRAND=motorola
PHONE_MODEL=moto g(6)

Would you like to work on the issue?
Yes