This is my code
File selfieLocation = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES),
"Daily Selfies");
boolean isDirectory = false;
if(!selfieLocation.isDirectory()) {
//Creates directory named by this file
selfieLocation.mkdir();
isDirectory = selfieLocation.isDirectory();
}
//array of strings
for(String selfiePath: selfieLocation.list()) {
selfies.add(selfiePath);
}
Basically what I am trying to do is create my own customizable directory inside of the standard directory in which to place pictures that are available to the user.
I looked at related threads and saw this one, Android: unable to create a directory in default pictures folder. However I made sure that I had a call to getExternal...., and not just have Environment.DIRECTORY_PICTURES as a parameter.
I also looked on here http://developer.android.com/guide/topics/data/data-storage.html#filesExternal and saw that I had the right method call/format to create a customizable folder in external memory. The docs example was
File file = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), albumName);
if (!file.mkdirs()) {
Log.e(LOG_TAG, "Directory not created");
}
I stepped through my code and saw that the local variable isDirectory stayed at false even after the call to selfieLocation.mkdir(). Does anyone know why this directory cannot be created?
Try to create directory with File#mkdirs(), not File#mkdir(). The latter assumes that all parent directories are already in place, so it won't create directory if any of its parents don't exist.
Also, take a look at your permissions in AndroidManifest.xml. You need the following permissions in order to read/write the content on external storage:
<manifest ...>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
...
</manifest>
android.permission.READ_EXTERNAL_STORAGE isn't required for now, but it will be in the future releases of Android.
Related
I'm new at this.
Telegram, Whatsapp, Vk, Aliexpress - All this apps can write they folders in /Storage/emulated/0
How can I create my folder in this place for Android 5...10?
When I try to use File("/storage/emulated/0/", myfile) - it doesn't work.
Please, can anyone give some mini example how can I create my files in storage
Since you haven't written any code, I can't tell you what you're doing wrong. But this is something that might help you.
First you need to declare permissions on your manifest.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
After that you can simply use this to create your folder.
String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/" +
"folderName";
File directory = new File(path);
directory.mkdirs(); // It returns a boolean you can use it to check if your folder
// was created.
Yes, You can create Folders inside the External Storage too.
But, keep in mind that you cannot use emulated/0 because it is different for different devices.
File path = new
File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/Folder/");
if(!path.exists()){
boolean k = path.mkdirs();
}
Although, Environment.getExternalStorageDirectory() is deprecated as of API29. So You can use getExternalDir() too.
I am new to Android and mostly using snippets of code from other posts to build my project. I am having a hard time creating a new directory and file on my device. I am using the following code, but I am unable to verify the success of the creation of this path. I want to be able to mount my phone to my laptop and find a file named "MyRecording.pcm" in a folder "/My/Files". I am using the boolean value of mkdirs() to verify whether or not the path was created on my device. If that path was not created then my TextView will tell me "Directories do not exist"; otherwise, my code will create the file MyRecording.pcm. I keep getting an error/warning "result of mkdirs() is ignored". Please help.
File path = new File(Environment.getExternalStorageDirectory() + "/My/Files");
path.mkdirs();
if(!path.exists()) { statusText.setText("Directories do not exist");}
else recordingFile = File.createTempFile("MyRecording", ".pcm", path);
Do you have the permission set in your manifest?
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Also, Android Studio is giving you the warning about mkDirs () because it returns a boolean indicating whether the directory was created. It's just reminding you that you never used the result. It doesn't matter.
I am trying to create a folder and then after that do some file IO operations!
I am using a sony Xperia Z to test this out!
I know right now I've hardcoded the location but it doesn't let me create folders!
File appPath = new File("/storage/sdcard1/folder");
if (!appPath.exists()) {
appPath.mkdirs();
}
I am using a targetSdkVersion of 22
And having lollipop on my phone.
I tried
appPath.mkDir();
as well but all this gives a value of False.
And i have added permissions to manifest
<uses-permission name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission name="android.permission.READ_EXTERNAL_STORAGE" />
And I tried many different open source file manager but none are able to create folders, But ES file Manager is able to create folders and do File IO operations!
Don't hardcode global paths like /sdcard, use Environment.getExternalStorageDirectory() and related methods instead. Here is a working sample.
public static String getNewFolderPath() {
File folder = new File(Environment.getExternalStorageDirectory()
.toString() + File.separator + "folder");
if (!folder.exists())
folder.mkdirs();
return folder.getAbsolutePath();
}
EDIT:
For more info check:
Find an external SD card location
#CommonsWare Answer
#Aleadam Answer
Hope it helps!
Can a xml file be created in Android just by creating an object of File class ie.
File FF=new File(Environment.getExternalStorageDirectory()+"//new.xml");
StreamResult result = new StreamResult(FF);
transformer.transform(source, result);
or
is it nececessary to use createNewFile() ie. FF.createNewFile()?
I've not written the detailed code here
Basically this should work if you requested the permission to write on the sd card. Add this to your manifest:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
I personally open (for write) and create the files at once, except I want a 0 byte file for some kinds of checks e.g. as a kind of switch.
I want to create a file(not created) in a directory(not created) in the SDCARD.
How doing it ?
Thank you.
Try the following example:
if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
//handle case of no SDCARD present
} else {
String dir = Environment.getExternalStorageDirectory()+File.separator+"myDirectory";
//create folder
File folder = new File(dir); //folder name
folder.mkdirs();
//create file
File file = new File(dir, "filename.extension");
}
Don't forget to add the permission to your AndroidManifest:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
The problem is that mkdirs() is called on a File object containing the whole path up to the actual file. It should be called on a File object containing the Path (the directory) and only that. Then you should use another File object to create the actual file.
You should also have to add permission to write to external media.
Add following line in the application manifest file, somewhere between <manifest> tags, but not inside <application> tag:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Use This:
DocumentFile tempDir = DocumentFile.fromSingleUri(context,targetDirectoryUri);
DocumentFile newDocumentFile = tempDir.createFile(type,name);
"targetDirectoryUri" is uri of the directory you want to put the file into it.
This is the only solution!
After Api 19 you can not write on SDCard, so you must use DocumentFile
instead File.
In addition, you must also take SDCard permission. To learn how to do this and get the targetDirectoryUri, please read this.
You can use in Kotlin
val file = File( this.getExternalFilesDir(null)?.getAbsolutePath(),"/your_image_path")
if (!file.exists()) {
file.mkdir()
}
Don't forget to give permission
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
See here why creating files on root of the SD card is a bad idea