Develop Reference

java.io.FileNotFoundException open failed: EEXIST (File exists) Android 11

I was trying to download an image from a server and save it in the external memory, but in Android 11 it gives me an error when I try to create the file.
I have granted permission to access the external storage.
i searched a bit on the internet and they suggested me to put this code in the manifest, but it didn't work for android 11
android:requestLegacyExternalStorage="true"
manifest
<uses-permission android:name="android.permission.CAMERA" />
<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.WAKE_LOCK" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:requestLegacyExternalStorage="true"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.TestDwonloadImgApp"
android:usesCleartextTraffic="true">
<activity android:name=".MainActivity2">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainActivity">
</activity>
</application>
MainActivity
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImageView img = findViewById(R.id.img);
ImmagineInterface ii = RetrofitManager.retrofit.create(ImmagineInterface.class);
Call<ResponseBody> call = ii.downloadFile("/immaginimusei/arte-scienza.jpg");
call.enqueue(new Callback<ResponseBody>() {
#Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
if (response.code() == 200) {
boolean result = writeResponseBody(response.body(), "/immaginimusei/arte-scienza.jpg");
if(result) {
Bitmap bitmap = BitmapFactory.decodeFile(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString() + "/ArtHunter/immaginimusei/arte-scienza.jpg");
img.setImageBitmap(bitmap);
}
}
}
#Override
public void onFailure(Call<ResponseBody> call, Throwable t) {
Bitmap bitmap = BitmapFactory.decodeFile(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString() + "/ArtHunter/immaginimusei/arte-scienza.jpg");
img.setImageBitmap(bitmap);
}
});
}
}
writeResponseBody
public static boolean writeResponseBody(ResponseBody body, String dir1) {
try {
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
// todo change the file location/name according to your needs
String path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString() + "/ArtHunter";
String path1 = path + dir1;
File f = new File(path1);
String path2 = f.getPath();
String nome = f.getName();
path2 = path2.replaceAll("/" + nome, "");
File directory = new File(path2);
if (!directory.exists())
directory.mkdirs();
File img = new File(path2, nome);
if (img.exists())
return true;
img.createNewFile();
InputStream inputStream = null;
FileOutputStream outputStream = null;
try {
byte[] fileReader = new byte[4096];
inputStream = body.byteStream();
outputStream = new FileOutputStream(img); //error here!
while (true) {
int read = inputStream.read(fileReader);
if (read == -1) {
break;
}
outputStream.write(fileReader, 0, read);
}
outputStream.flush();
return true;
} catch (IOException e) {
e.printStackTrace();
return false;
} finally {
if (inputStream != null) {
inputStream.close();
}
if (outputStream != null) {
outputStream.close();
}
}
}
return false;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
error
/System.err: java.io.FileNotFoundException: /storage/emulated/0/Download/ArtHunter/immaginimusei/arte-scienza.jpg: open failed: EEXIST (File exists)
W/System.err: at libcore.io.IoBridge.open(IoBridge.java:492)
at java.io.FileOutputStream.<init>(FileOutputStream.java:236)
at java.io.FileOutputStream.<init>(FileOutputStream.java:186)
at com.theapplegeek.testdwonloadimgapp.MainActivity.writeResponseBody(MainActivity.java:93)
at com.theapplegeek.testdwonloadimgapp.MainActivity$1.onResponse(MainActivity.java:47)
at retrofit2.DefaultCallAdapterFactory$ExecutorCallbackCall$1.lambda$onResponse$0$DefaultCallAdapterFactory$ExecutorCallbackCall$1(DefaultCallAdapterFactory.java:89)
at retrofit2.-$$Lambda$DefaultCallAdapterFactory$ExecutorCallbackCall$1$hVGjmafRi6VitDIrPNdoFizVAdk.run(Unknown Source:6)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:245)
at android.app.ActivityThread.main(ActivityThread.java:8004)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:631)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:978)
Caused by: android.system.ErrnoException: open failed: EEXIST (File exists)
at libcore.io.Linux.open(Native Method)
at libcore.io.ForwardingOs.open(ForwardingOs.java:166)
at libcore.io.BlockGuardOs.open(BlockGuardOs.java:254)
W/System.err: at libcore.io.ForwardingOs.open(ForwardingOs.java:166)
at android.app.ActivityThread$AndroidOs.open(ActivityThread.java:7865)
at libcore.io.IoBridge.open(IoBridge.java:478)
... 13 more

In Android 11 android:requestLegacyExternalStorage="true" will simply be ignored, since it was an ad-hoc solution for Android < 11 to not break old apps.
Now, you must use
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
Also you could just use SAF to avoid all this 'permissions' hassle. This is what Google recommends for apps that do not need to manage most internal storage data. Refer to:
https://developer.android.com/guide/topics/providers/document-provider
However, if you don't want to break you app and lose all your hard work, consider
if(Environment.isExternalStorageManager())
{
internal = new File("/sdcard");
internalContents = internal.listFiles();
}
else
{
Intent permissionIntent = new Intent(Settings.ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION);
startActivity(permissionIntent);
}
This will bring up a settings page where you will be able to give storage access to your app. If the app already has permission, then you will be able to access the directory. Place this at the very beginning of onCreate() method after setting layout resource.
It's best not to do this for any future apps you build.

Go to your mobile setting -> apps -> select your app -> permissions -> storage -> select Allow managment of all files
It works for me.

Android has become too complex when it comes to creating folders.
If you want to avoid so many problems and not use things like android:requestLegacyExternalStorage="true" and adding many permissions like MANAGE_EXTERNAL_STORAGE, READ_EXTERNAL_STORAGE, WRITE_EXTERNAL_STORAGE which can be a nightmare, even when it comes to publishing your app to the marketplace.
In addition to that, from Android version 30 onwards, you ca NOT extend android:requestLegacyExternalStorage="true". So you will have problems again.
What is recommended is to start to save your recordings inside applications dedicated folder, because in the future Android will no longer let you create folders anymore, even with legacy methods. You can use standard directories in which to place any file like DIRECTORY_MUSIC, DIRECTORY_PICTURES, etc.
For instance, I created my own method for saving audio recording in Android 33 and it works perfectly. I don't need to add anything to my Manifest.
override fun startRecording(): Boolean {
try {
val recordingStoragePath = "${app.getExternalFilesDir(Environment.DIRECTORY_MUSIC)}"
recordingFilePath = "$recordingStoragePath/${fileRecordingUtils.generateFileName()}"
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC)
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP)
// Audio Quality Normal
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB)
mediaRecorder.setAudioSamplingRate(8000)
// Set path
mediaRecorder.setOutputFile(recordingFilePath)
mediaRecorder.prepare()
mediaRecorder.start()
Toast.makeText(app, "Recording Started", Toast.LENGTH_SHORT).show()
} catch (e: IOException) {
Toast.makeText(app, "Recording Failed. Problem accessing storage.", Toast.LENGTH_SHORT).show()
mediaRecorder.reset()
return false
} catch (e: Exception) {
mediaRecorder.reset()
return false
}
return true
}

Update android debug app causes "app is not installed" (no google play)

I am trying to make possible for users to update ann app from device. We have a server where from user can download apk file with new version of an app.
Here is the code which starts after button pressed:
Handler handler = new Handler(Looper.getMainLooper());
Thread thread = new Thread(new Runnable() {
#Override
public void run() {
File folder = new File(getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS).toString());
File file = new File(folder.getAbsolutePath(), "localdb.apk");
final Uri uri = (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) ?
FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID + ".provider", file) :
Uri.fromFile(file);
if (file.exists())
file.delete();
//url to get app from server
String url = Names.UPDATE_URL;
InputStream input = null;
OutputStream output = null;
HttpURLConnection connection = null;
try {
URL sUrl = new URL(url);
connection = (HttpURLConnection) sUrl.openConnection();
connection.connect();
// download the file
input = connection.getInputStream();
output = new FileOutputStream(file);
byte data[] = new byte[4096];
int count;
while ((count = input.read(data)) != -1) {
// allow canceling with back button
output.write(data, 0, count);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (output != null)
output.close();
if (input != null)
input.close();
} catch (IOException ignored) {
}
if (connection != null)
connection.disconnect();
}
handler.post(new Runnable() {
#Override
public void run() {
Intent install = new Intent(Intent.ACTION_INSTALL_PACKAGE)
.setData(uri)
.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(install);
}
});
}
});
thread.start();
Here is what i have in manifest:
...<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.QUICKBOOT_POWERON" />
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES"/>
...
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="ru.mob.myapp.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths"/>
</provider>
...
and finally an xml file provider_paths:
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path name="external_files" path="."/>
</paths>
So, everything works fine, I download apk with new version, it is named same as already installed,
system asks me to install (update) my application, but when everything is almoust done I get "App is not installed" message without any details.
Does anyone have a solution, hint, adviсe?

Writing permission on android filesystems

I should generate a .pdf file inside the android data folder to use the Java code below, with the permissions enabled in the XML manifest file. But when I run the code I have the following exception. The application has different permissions within the manifest, It should all be configured correctly, I state that the application I'm testing on an old Android 4. How can I solve this? and what is it due to?
Exception: error: java. I. FileNotFoundException: /data/my.pdf:
open failed: EACCES (Permission denied)
Code:
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE " />
public static Boolean GeneratePDF(String base64) {
Boolean ret = true;
try {
String direttorio=""+Environment.getDataDirectory().getAbsolutePath();
final File dwldsPath = new File(direttorio + "/" + "my.pdf");
byte[] pdfAsBytes = Base64.decode(base64, 0);
FileOutputStream os;
os = new FileOutputStream(dwldsPath, false);
os.write(pdfAsBytes);
os.flush();
os.close();
} catch (Exception ex) {
System.out.println("\n Errore Generazione File: "+ex);
ret = false;
}
return ret;
}

you have to give Write permission at run time.
It can be achieved something as following...
public class MainActivity extends AppCompatActivity implements ActivityCompat.OnRequestPermissionsResultCallback{
private static final int REQUEST_WRITE_PERMISSION = 111;
#Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
if (requestCode == REQUEST_WRITE_PERMISSION && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
GeneratePDF("your String name");
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
requestPermission();
}
private void requestPermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
requestPermissions(new String[]{android.Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_WRITE_PERMISSION);
} else {
GeneratePDF("your String name");
}
}
}

Replace this line
String direttorio=""+Environment.getDataDirectory().getAbsolutePath();
To:
String direttorio= Environment.getExternalStorageDirectory().getAbsolutePath();
final File dwldsPath = new File(direttorio + "/" + my.pdf");

if you're using Android 6.0 and above,
there could be 2 ways:
1 if you're making only for demo purpose you can manually give permission to app
by going in settings->apps->permissions. Then allow all permission which are
required.
2 you've to implement runtime permissions so that user can allow it runtime.

Need help writing file to external storage

I've been searching the internet for several hours now in an attempt to find a file writing function that actually works for me. So far I have this in my MainActivity.java:
public void writeToFile(String data, Context ctx) {
File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS);
File tempFile = new File(path, "houseDataFile.txt");
if(!tempFile.exists()){
tempFile.mkdirs();
}
try
{
FileOutputStream fOut = new FileOutputStream(tempFile);
fOut.write(data.getBytes());
fOut.close();
Toast.makeText(ctx, "Saved", Toast.LENGTH_SHORT).show();
}catch (Exception e)
{
Log.w(TAG, "FileOutputStream exception: - " + e.toString());
}
}
My android manifest contains both permissions:
<?xml version="1.0" encoding="utf-8"?>
<manifest package="my.package.application"xmlns:android="http://schemas.android.com/apk/res/android">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
</activity>
<activity android:name=".Menu_activity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
Though rather frustratingly when I run the app and call writeToFile() it gives me an error saying:
W/MainActivity: FileOutputStream exception: - java.io.FileNotFoundException: /storage/emulated/0/Documents/houseDataFile.txt: open failed: ENOENT (No such file or directory)
Any help would be greatly appreciated, thank you in advance.

I'm assuming that you are failing to get the file path because you don't asking runtime-permission while executing method. Here you can take a look at the below code.
First, check if your device's OS version is above Lollipop or not. If above then show permission pop-up dialog.
final int MyVersion = Build.VERSION.SDK_INT;
if (MyVersion > Build.VERSION_CODES.LOLLIPOP_MR1)
{
if (!checkIfAlreadyhavePermission())
{
ActivityCompat.requestPermissions(ProfileActivity.this, new String[] {android.Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
}
else
{
writeToFile(data, ctx);
}
}
else
{
writeToFile(data, ctx)
}
private boolean checkIfAlreadyhavePermission() {
int result = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE);
return result == PackageManager.PERMISSION_GRANTED;
}
Then define "Allow" and "Deny" button functionalities in OnRequestPerMissionResult().
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case 1: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
writeToFile( data, ctx);
} else {
Toast.makeText(YourActivity.this, "Please provide permission", Toast.LENGTH_LONG).show();
}
break;
}
}
Please let me know if this solves the issue.

Why I don't have the permission to save the file into SD Card?

I want to use the file explorer in Android system to show the file I saved before.
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType(ContactsContract.Contacts.CONTENT_ITEM_TYPE);
startActivityForResult(intent, 1);
So, I think saving the data into SD card is the only way to achieve this. I've found many materials, but I always get the error that I don't have the permission to save the data into SD card. The error message is as follow.
01-17 23:35:44.184 6337-6337/? W/System.err: java.io.FileNotFoundException: /storage/emulated/0/rtd: open failed: EACCES (Permission denied)
01-17 23:35:44.184 6337-6337/? W/System.err: at libcore.io.IoBridge.open(IoBridge.java:452)
01-17 23:35:44.185 6337-6337/? W/System.err: at java.io.FileOutputStream.<init>(FileOutputStream.java:87)
01-17 23:35:44.185 6337-6337/? W/System.err: at java.io.FileOutputStream.<init>(FileOutputStream.java:72)
In fact I do add the permission lines in the AndroidManifest
</activity>
</application>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
</manifest>
So, can anyone help me figure out what I should do to fix this error?
Here is the code of my saving button
class ButtonClickListener2 implements View.OnClickListener{
#Override
public void onClick(View v){
// Intent intent = getIntent();
Name = getIntent().getStringExtra("Name");
Age = getIntent().getStringExtra("Age");
Movie = getIntent().getStringExtra("Movie");
File2 = getIntent().getStringExtra("File");
TextView txt = (TextView)findViewById(R.id.textView3);
txt.setText(Name+" "+ Age+ " "+Movie+" "+ File2);
String filename = File2.toString();
String Age_Content = Age.toString();
String Movie_Content = Movie.toString();
String Name_Content = Name.toString();
FileService service = new FileService(getApplicationContext());
try {
if(Environment.getExternalStorageState().equals(Environment.getExternalStorageState())){
service.save(filename, Age_Content, Movie_Content,Name_Content);
Toast.makeText(getApplicationContext(),R.string.SDCard_available,Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(getApplicationContext(),R.string.SDCard_protected,Toast.LENGTH_SHORT).show();
}
Toast.makeText(getApplicationContext(),R.string.success,Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Toast.makeText(getApplicationContext(),R.string.fail,Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
}
class FileService {
private Context context;
public FileService (Context context) {
this.context = context;
}
public void save(String filename, String Age_content, String Movie_content, String Name_content) throws Exception{
//save the data into SD card
/* FileOutputStream outputStream = context.openFileOutput(filename,Context.MODE_APPEND);
outputStream.write(Age_content.getBytes());
outputStream.write(Movie_content.getBytes());
outputStream.write(Name_content.getBytes());
outputStream.close();*/
File file = new File(Environment.getExternalStorageDirectory(),filename);
FileOutputStream outputStream = new FileOutputStream(file);
outputStream.write(Age_content.getBytes());
outputStream.write(Movie_content.getBytes());
outputStream.write(Name_content.getBytes());
outputStream.close();
}
}

If you're using Android M, try this:
private final String[] permissions = {Manifest.permission.READ_EXTERNAL_STORAGE};
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
requestPermissions(permissions, 2909);
Also, override the onRequestPermissionsResult method as follows:
#Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
Your activity must extend AppCompatActivity in order for this to work.
Android has introduced runtime permissions with version 6.0. You might want to look into it.

In your manifests file put the below code
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Check whether you used PERMISSIONS in AndroidManifest.xml
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" />