I am not talking about system root files. Root dir of mounted devices, external sd card and internal storage. – user2983041. Aug 11 '19 at 12:52.
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AndroidQ(10)askpermissiontogetaccessallstorage.Scopedstorage
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InAndroid10appsthatneedtoaccessstorageneedtoaskpermissiontoaccessaconcretepath.Butappslikefileexplorercanaskpermissionforaccesstotherootstorageandgainpermissiontoread/writetoallstorage.ThatiswhatIamtryingtodo.
AccordingtoAndroidwemustuseACTION_OPEN_DOCUMENT_TREEforthis.TheproblemIhaveisthateverythingseemscorrect,butthepermissionisnotgrantedtotheapp.
privatevoidaskAndroid10Perm()
{
Intentintent=newIntent(Intent.ACTION_OPEN_DOCUMENT_TREE);
intent.addFlags(
Intent.FLAG_GRANT_READ_URI_PERMISSION
|Intent.FLAG_GRANT_WRITE_URI_PERMISSION
|Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION
|Intent.FLAG_GRANT_PREFIX_URI_PERMISSION);
startActivityForResult(intent,REQUEST_CODE_OPEN_DOCUMENT_TREE);
}
HeretheusercanseeAndroidfiletreeand,withmainstorageselected,clicktograntpermission."Itwillallow-appname-tohavefullaccesstoallfilescurrentlystoreunderthislocation,andanyfuturecontentstoredhere"->Allow
Then:
@Override
protectedvoidonActivityResult(intrequestCode,intresultCode,Intentdata){
super.onActivityResult(requestCode,resultCode,data);
switch(requestCode){
caseREQUEST_CODE_OPEN_DOCUMENT_TREE:
if(resultCode==Activity.RESULT_OK){
UritreeUri=data.getData();
inttakeFlags=data.getFlags();
takeFlags&=(Intent.FLAG_GRANT_READ_URI_PERMISSION|
Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.KITKAT){
Log.i("TAG","takePersistableUriPermission:"+treeUri);
this.getContentResolver().takePersistableUriPermission(treeUri,takeFlags);
}
}
}
}
Log:
takePersistableUriPermission:
content://com.android.externalstorage.documents/tree/primary%3A
Thentheappwillstillnothavepermissiontoaccesstoroot.
openfailed:EACCES(Permissiondenied)
OfcourseIhave:
Grantedbytheuser.
androidandroid-10.0scoped-storage
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editedApr8'20at13:24
Milk
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askedAug11'19at10:36
user2983041user2983041
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Idon'tthinkyoucanhaverootaccessinAndroidQ
– GauravMall
Aug11'19at10:38
SomeappsthatItestedhavethisaccesswithscopedstorage.Forexample"Solidexplorer"app.
– user2983041
Aug11'19at10:40
1
Yes,Iknow.IhadaskedasimilarquestionandCommonWaresaidtomethatthatisbecauseoftheengineersthosecompanieshave.Iknow,hisanswerwasn'tthatuseful.
– GauravMall
Aug11'19at10:41
whatdoyoumeanwithrootaccess?
– greywolf82
Aug11'19at11:18
Accesstodevicestoragefiles.Samefilesthatshowdefaultfileexplorerpreinstalledapp.Iamnottalkingaboutsystemrootfiles.Rootdirofmounteddevices,externalsdcardandinternalstorage.
– user2983041
Aug11'19at12:52
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5Answers
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41
AddlineinManifest
-------------------
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editedMay13at7:16
answeredFeb20'20at9:00
D_KD_K
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Workedlikeacharm!
– MohdZaid
May11'20at2:26
3
Thisisonlytemporarily,seedeveloper.android.com/training/data-storage/…
– dominikkv
Jun9'20at13:43
Wellthatjustcostme3hoursofmylife...ThanksD_K
– SimonCorcos
Aug31'20at19:48
Inandroid11Itwillnotworkanymore.So,Howcanweaccessfullstorageaccessonandroid11too?anyidea?
– ChiragPrajapati
Jan22at2:58
YouhavetouseMediaStoreforAndroid11orabovelookoutthis:developer.android.com/training/data-storage/use-cases
– D_K
Jan22at7:06
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11
youmustaddthislineinyourAndroidManifest.xml
android:requestLegacyExternalStorage="true"
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answeredJul30'20at16:46
tohidhajimoradtohidhajimorad
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7
TheproblemwasthatIuseFileobjecttoaccessfiles,butpermissiononlyworkifweuseDocumentFileobjecttomanipulatefiles.
SolvedusingDocumentFileinsteadofFile.
IthasmultiplenegativepointstouseDocumentFile,suchasperformanceandthatyoudon'thaveaccesstoapachecommonslibrariesforexample,butthereisnootheroption.
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answeredAug14'19at15:19
user2983041user2983041
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doesFile(path),file.delete(),mkdirs()notworkonandroidQ?Whatdoesscopedstoragechange?
– AswinPAshok
Aug14'19at18:03
3
Therearelibsforjavathatyoucancopy,cutorzipdirectoriesin"File"objectsforexample.ThislibsnotexistforDocumentFile.
– user2983041
Aug15'19at18:08
FileAPIisnotavailableinandroid10forfilesinsharedstoragethatyourappdoesnotown.developer.android.com/training/data-storage/shared/…
– M.RezaNasirloo
Jun16at6:23
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1
ItcouldbesimplerwithSimpleStorage.Youcanrequestthestoragefullaccesstotheuser:
classMainActivity:AppCompatActivity(){
privatevalstorageHelper=SimpleStorageHelper(this)
overridefunonCreate(savedInstanceState:Bundle?){
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
btnRequestStorageAccess.setOnClickListener{
storageHelper.requestStorageAccess()
}
storageHelper.onStorageAccessGranted={requestCode,root->
//dostuff
}
}
}
ItworksonAndroid10andhigher.Noneedtoaddandroid:requestLegacyExternalStorage="true"tothemanifestfile.
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answeredJul17at16:48
AnggrayudiHAnggrayudiH
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