i want to create new file iam using this code
try {
File file = new File(Environment.getExternalStorageDirectory() + File.separator + "Contacts.vcf");
file.createNewFile();
} catch (IOException ioe)
{ioe.printStackTrace();}
and using this permission
<permission android:name="android.permission.MOUNT_FORMAT_FILESYSTEMS" ></permission>
but it keeps givinh me exeption that says Permission denied
you need to use this permission in manifest file
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
when you write any file in External Storage(SD CARD) or Internal Storage ,You have to add permission in manifest file...
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
add this permission into your manifest file
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Give WRITE_EXTERNAL_STORAGE permission to your AndroidManifest file as shown below:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
.........
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
</manifest>
Related
I am developing a Flutter app. I am trying to add a functionality to delete a file in device storage. When i initialize a file object with the path to the file, and run file.exist() i get true. But when i run file.delete() i get
(OS Error: No such file or directory, errno = 2)when file.delete(). At the same file.exist() return true!
I have these permissions in my manifest
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_MEDIA_STORAGE" />
<uses-permission android:name="android.permission.STORAGE_INTERNAL" />
and
<application
android:requestLegacyExternalStorage="true"
And i am using permission_handler to ask for permission first.
Any idea?
I'm trying to read a file that exists, but I can not. Thanks!
File f = new File("/mnt/sdcard/WhatsApp/Media/WhatsApp Images/IMG-20180628-WA0000.jpg");
File sdDir = Environment.getExternalStorageDirectory();
Log.w("Whatsapp","#SDDIR CANREAD? "+ sdDir.canRead() +" PATH: "+ sdDir.getAbsolutePath());
f.setReadable(true,false);
Log.w("Whatsapp","#FILE: "+ f.getName() +" l:"+ f.length() +" exists:"+ f.exists() +" canRead:"+ f.canRead() +" PATH: "+ f.getPath() +" ABSOLUTE: "+ f.getAbsolutePath());
LOG
#SDDIR CANREAD? false PATH: /storage/emulated/0
#FILE: IMG-20180628-WA0000.jpg l:0 exists:false canRead:false PATH: /mnt/sdcard/WhatsApp/Media/WhatsApp Images/IMG-20180628-WA0000.jpg ABSOLUTE: /mnt/sdcard/WhatsApp/Media/WhatsApp Images/IMG-20180628-WA0000.jpg
AndroidManifest Permissions
<uses-permission android:name="ANDROID.PERMISSION.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="ANDROID.PERMISSION.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="ANDROID.PERMISSION.MANAGE_DOCUMENTS" />
First, you do not have arbitrary read-write access to removable storage.
Second, most things in Android are case-sensitive. So, your <uses-permission> elements will not work.
Third, you cannot hold the MANAGE_DOCUMENTS permission, as that is not available for ordinary apps.
So you can fix your manifest by replacing your existing <uses-permission> elements with:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
However, you still may not have access to that particular file.
Works!
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
I'm trying to create folder in internal storage of the device, and have some problems with that. I can't create directory using :
String rootPath=Environment.getExternalStorageDirectory().getPath()+"/test";
File file=new File(rootPath);
if(!file.exists()){
file.mkdir();
}
file.mkdir return false
I have such permissions:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" />
Thank you very much for answers !
So really, as you all guys said in Android Marshmallow (API 23) or higher we need to ask runtime permissions.
To solve this issue use call :
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
in your onCreate() method
Thanks all for your help !
You can use
File sampleDir = new File(Environment.getExternalStorageDirectory(), "/test");
if (!sampleDir.exists()) {
sampleDir.mkdirs();
}
I have been trying to download a file from a url.
I have set the permissions in my android manifest file like so,
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
I am using a library called Adavnced WebView to handle downloads:
AdvancedWebView.handleDownload(view.getContext(),"https://static1.squarespace.com/static/57752cbed1758e541bdeef6b/t/58d91311ff7c50b172946ee5/1490621221735/PreKGuide_2017_English_032417+%281%29.pdf" , "abc.txt");
I get an error when I try to download. It clearly says that the app doesn't have permission to write to storage path. How can I set permission to write? What am I missing here? Please help.
java.lang.SecurityException: No permission to write to /storage/emulated/0/Download/abc.txt: Neither user 10147 nor current process has android.permission.WRITE_EXTERNAL_STORAGE.
You need the runtime permission, check the documentation.
I am creating an app in which I would like to read a file from the sd card and then write to another file using info from the other file. When attempting to read the file I get the following error: System.UnauthorizedAccessException: Access to the path 'sdcard/android/data/App1.App1/files/' is denied.
Read Function:
private string ReadFile(string fileName)
{
var path = "sdcard/android/data/App1.App1/files/";
var filePath = Path.Combine(path.ToString(), fileName);
string text = File.ReadAllText(path.ToString());
return text;
}
Android Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="App1.App1" android:versionCode="1" android:versionName="1.0" android:installLocation="auto">
<uses-sdk android:minSdkVersion="16" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application android:label="Scout" android:icon="#drawable/Icon" android:theme="#style/CustomActionBarTheme"></application>
</manifest>
I have solved the issue and found that I was trying to read a folder instead of the file itself. When switching out the variable path with filePath int the read all text function the error went away.
Do not forget to add
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
into the manifest. This allows to read and write on SD card.
More details about uses-permission
It can also be a problem with your simulator and your sd card, read this topic