I want to create directory in SD card same as in the internal storage.
My internal storage path is "sdcard/<my_directory_name>/"
I want to create the same directory in root of SD card.
I have try the following ways to find the path of directory.
sdcard1/<my_directory_name>/
Environment.getExternalStorageDirectory() +"/<my_directory_name>/"
Please suggest the way to find SD card path.
You do not have arbitrary access to removable storage on Android 4.4+. Hence, there is no useful path, from a filesystem standpoint. You are welcome to use getExternalFilesDirs() and kin -- if they return 2+ locations, the second and subsequent ones are on removable storage, and you can read and write to those locations.
Although as CommonsWare answered, you cannot read or write in Secondary External Storage, here's a way to generate it's path.
System.getenv("SECONDARY_STORAGE"); //returns /storage/extSdCard
You can also use String path = "/storage/extSdCard"; but again you cannot write files there.
Edit: As #CommonsWare commented, there is no guarantee of this method. Though when I tested it, it worked, but again, if he says there's no guarantee, you can take his word.
Related
Internal Storage Path
Consider the above picture. It shows the folders and file in internal storage. My problem is i am not able to get the absolute path of the internal storage. I Have tried using
String path = getFilesDir().getAbsolutePath();
but it is giving me the path of my app storage. My objective is to backup a file from the private storage of my app to the top of internal storage. And i am unable to find a solution on web and neither on stack overflow. Suggest a solution to this problem!
Environment.getExternalStorageDirectory();
Return the primary shared/external storage directory.
Note: don't be confused by the word "external" here. This directory can better be thought as media/shared storage. It is a filesystem that can hold a relatively large amount of data and that is shared across all applications (does not enforce permissions). Traditionally this is an SD card, but it may also be implemented as built-in storage in a device that is distinct from the protected internal storage and can be mounted as a filesystem on a computer.
File dir = Environment.getExternalStorageDirectory();
String path = dir.getAbsolutePath();
It is only possible with root access. You should write you backup to external storage to make it world-readable. Android docs says that if you want to share file with other apps or store this file even after app will be deleted you should save it to external storage. Android docs
Try this,
String path = Environment.getExternalStorageDirectory().getAbsolutePath();
I make a search on google and other.
I can not find answer about external storage/memory card path.
so please help.
There is no reliable way to determine the path to a micro SD card. To removable storage.
getExternalStorageDirectory() will give a path to external storage and hence is unusable.
You better let the user pick the right path.
On modern systems you can try getExternalFilesDirs().
how can I get the path for the folder where my app can save large JPG files?. getExternalStorageDirectory() works fine only when SD Card is present, but what happens when SD is removed or the harware don't have SD Card slot.
thanks
You can use the getFilesDir() method of a Context. From a context you can also use methods to get the cache directory, external cache directory, and the external files directory. An Activity is also a context, so you can use these methods from inside one.
The getFilesDir() method gives you the folder where your files will be accessible only from your application and will be always available. However, you should use the cache directory instead, when possible. This way you will avoid making the system run out of space.
EDIT:
My answer: Almost always a device will either have an SD card or built-in external storage. When it's built-in, it's still called external storage. To check whether the external storage is removable (SD card) or built-in you can use isExternalStorageRemovable() in Environment.
Basically, you shouldn't place large files on the internal memory. There is no public folder in the internal memory. If a device doesn't have external storage, it's simply not capable of doing certain things. Simple as that. So one option you have when there is no external storage is to inform the user about it and ask them to insert a card. You don't have to handle this case, let the user handle it.
The answer you asked for: Try using getDir(String name, int mode) and/or openFileOutput(String name, int mode) of a Context object, and for mode use MODE_WORLD_READABLE or MODE_WORLD_WRITEABLE. Also check Using the Internal Storage.
You are facing intended limitations of the platform that are there for the good of everyone.
You could either require external directory to exist, or you can store to the internal directory. If you choose to permit both, I suggest you store a flag in internal space to indicate that you've stored something externally, so that if external storage is not present you can take appropriate action.
As you are Saving Large JPG files, its is better to save it in external storage because Phone has very small internal memory and its all effect the performance of phone.
I have file in Assets and I need to write this file to the Internal memory (not to the private part as a /data/data/mypackage/files, but to the memory I am able to see as a removable disk, when I am connected to PC). Is there any way how to achieve this? I don't mean the method for file copy, but how to access my internal memory?
Here is a discussion that answers this problem. I'm assuming that you want to copy your asset to the SD card.
How to copy files from 'assets' folder to sdcard?
I'm not entirely certain about what you are asking, it sounds like you want to write to the SD card, but that's also usually considered external memory. If this is what you mean though, here is the documentation you need to read: http://developer.android.com/guide/topics/data/data-storage.html#filesExternal
Is there a way to store android application data on the SD card instead of in the internal memory?
I know how to transfer the application sqlite database from the internal memory to the SDCard, but what if the internal memory gets full in the first place? How does everyone handle this?
It's better practice to use Environment.getExternalStorageDirectory() than to hard code "/sdcard"
It's not always certain that the folder name will be called that. Also, the Environment class offers a getExternalStorageState() method to check on if the external storage is even available.
To begin:
Depending on the model/os, you can access the sd card root directory with:
File externalStorage = Environment.getExternalStorageDirectory();
This will refer to the internal sd storage or internal sd memory.
externalStorage.getAbsolutePath()
will return one of the following values
"/sdcard/" or "/mnt/sdcard/"
To access the external sd memory or micro SD, that you usually plug from the outside of the phone/tablet, you must use one of the following folders that android creates to point to the external memory:
"/mnt/sdcard/sd"
"/mnt/sdcard/external_sd"
"/sdcard/external_sd"
"/sdcard/sd"
"/mnt/sdcard/"
ps: you can notice an empty folder external_sd or sd on the internal sdcard
memory, this folder is empty and its used to point to external micro sd card.
at the end make sure that you have read/write access to the sd card android.permission.WRITE_EXTERNAL_STORAGE in the android manifest xml.
finally you must specify the file name and your ready
private SQLiteDatabase DB = null;
private static final String DATABASE_NAME = "MyDb.db";
////////////
File sdcard = Environment.getExternalStorageDirectory();
String dbfile = sdcard.getAbsolutePath() + File.separator+ "external_sd" + File.separator + DATABASE_NAME;
DB = SQLiteDatabase.openDatabase(dbfile, null,SQLiteDatabase.NO_LOCALIZED_COLLATORS);
///////////
and your ready to go ...
Here is another neat little trick.
The Application has a number of methods which are called to acquire paths.
In particular the application has the method getDatabasePath with is used by SQLiteOpenHelper to construct the path.
A custom application class can override these methods to provide different paths including paths in the getExternalStorageDirectory.
The external storage is either application specific or public.
There are methods, replacing the getExternalStorageDirectory mechanism,
getExternalFilesDir() and getExternalStoragePublicDirectory() respectively.
Warning: This answer is out-dated. You should use Environment.getExternalStorageDirectory() to get the root path of the SD card as mentioned in the answers below.
Old Answer so the comments on this make sense:
Adding /sdcard/ to the root your path should direct your Android application to use the SD card (at least it works that way with the G1). Android's file system objects give you the ability to check file sizes... so it should be possible (if tricky) to write some fail-over code. This code would adjust your root path if the internal memory filled up.
some device use /mnt/sdcard as root point to SD Card.
The problem with using the SDCard is that you cannot reliably assume that it will be present always when your application needs it. This is not the case with internal memory. As long as your application does not rely on this data to run it should be fine.