After modifying build.gradle with : compileSdkVersion 28 to 32 targetSdkVersion 28 to 32 I can't write a local file from retrofit response. I get error :
java.io.FileNotFoundException: /storage/emulated/0/DontEat/rangt_00001.jpg: open failed: EPERM (Operation not permitted)
AndroidManifest.xml contains :
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
and my code is :
public static void downloadFile(SyncCalls.CallbacksDownload callbacks, final String type, final File file, final Boolean last) {
final WeakReference<SyncCalls.CallbacksDownload> callbacksWeakReference = new WeakReference<>(callbacks);
SyncService service = SyncService.retrofit.create(SyncService.class);
String filename = file.toString().split("/")[5];
Call<ResponseBody> call = service.downloadFile(filename);
call.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(@NonNull Call<ResponseBody> call, @NonNull Response<ResponseBody> response) {
try {
OutputStream out = null;
InputStream in = null;
ResponseBody body = response.body();
try {
if (body != null) {
in = body.byteStream();
out = new FileOutputStream(file);
byte[] fileReader = new byte[4096];
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
while (true) {
int read = in.read(fileReader);
if (read == -1) {
break;
}
out.write(fileReader, 0, read);
}
out.flush();
}
} catch (IOException e) {
if (BuildConfig.DEBUG) Log.v(Consts.TAG, e.toString());
} finally {
if (in != null) {
in.close();
}
if (out != null) {
out.close();
}
}
} catch (IOException e) {
if (BuildConfig.DEBUG) Log.v(Consts.TAG, e.toString());
}
if (BuildConfig.DEBUG) Log.v(Consts.TAG, "download " + file.toString());
if (callbacksWeakReference.get() != null)
callbacksWeakReference.get().onResponseSync(type, "down", last);
}
Permissions are verified with :
// Storage Permissions variables
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static final String[] PERMISSIONS_STORAGE = {
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE
};
//permission method.
public static void verifyStoragePermissions(Activity activity) {
// Check if we have read or write permission
int writePermission = ActivityCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE);
int readPermission = ActivityCompat.checkSelfPermission(activity, Manifest.permission.READ_EXTERNAL_STORAGE);
if (writePermission != PackageManager.PERMISSION_GRANTED || readPermission != PackageManager.PERMISSION_GRANTED) {
// We don't have permission so prompt the user
ActivityCompat.requestPermissions(
activity,
PERMISSIONS_STORAGE,
REQUEST_EXTERNAL_STORAGE
);
}
}
Is my mistake in the code or the permissions please?
I don't develop more because of my very limited English. (It's an app I made many years ago, for personal use only, family, but I can't scale it because of this bug that appeared with new android versions while it was working perfectly so far)
Edit: Actually, I think I'm taking the problem upside down and I'd better use the application's internal data directory with getFilesDir() and I won't have permission problems anymore, if I understood correctly.
