Develop Reference

How to delete files in Android?

I have a file with this path:
file:/mnt/sdcard/Android/data/myapp/files/Pictures/IMG_20140108_160223.jpg
When I try this code:
File f = new File(path);
f.delete();
The file is not deleted.
How can I do?

I've found a similar question here:
How to delete a file from SD card?
The file: prefix seems unnecessary.
try/mnt/sdcard/Android/data/myapp/files/Pictures/IMG_20140108_160223.jpg
Also you have to give permission if you are using >1.6 SDK
uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
in AndroidManifest.xml file

You may need to use
file.getCanonicalFile().delete();
or even (assumming this is a context)
this.deleteFile("string");
More Infos here to delete file with context object
You may also delete your file:/ at the beginning of your File object creation.

no permission to write in /mnt/extsd [duplicate]

This question already has answers here:
Android SD card writing, Permission Denied
(5 answers)
Closed 10 years ago.
i'm unable to write into the external sd ( /mnt/extsd ) in mini x plus h24
i have already insert in the manifest
The system has two sd card, the first one is reachable with Environment.getExternalStorageDirectory() but the second is only reachable with absolute path
try{
File file3 = new File("/mnt/extsd/", "file.txt");
BufferedWriter writer = new BufferedWriter(new FileWriter(file3));
writer.write("hello");
writer.flush();
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
The exception return me this message
/mnt/extsd/file.txt: open failed: EACCES (Permissio denied)
Any suggestions?

add below permission in android manifest file.
Write Permission
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Read Permission
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

You need to add the permission
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
in your AndroidManifest.xml file.
EDIT
If you have already added that permission and still getting permission denied error, you might be writing to a read only directory or you're not allowed to write on the root of that directory.
You may want to check if the directory is writeable. Somthing like:
file3.canWrite()
or you may try adding a child directory, before writing
File newDir = new File("/mnt/extsd/myFiles");
newDir.mkdirs();
File file3 = new File(newDir.getAbsolutePath(), "file.txt");

Simple just add the permission in android manifest file.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

if you have already added the permissions in the manifest file then,
try with these:
1) File file1 = new File(Environment.getExternalStorageDirectory() + "file.txt");
2) File file2 = new File("file:///mnt/extsd/", "file.txt");
3) File file3 = new File("file:///mnt/sdcard/", "file.txt");
and then use
String filepath = "file:///" + file1.getAbsolutePath();

Android SDcard Permissopn denied while writing a file?

In my application, while writing a file sdcard it shows Permission denied. But i give permission in sdcard. Please help?
Writing file code:
File sdcard = Environment.getExternalStorageDirectory();
File f = new File(sdcard, "/abc.txt");
if (f.exists()) {
f.delete();
}
Manifest :
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Thanks in advance!!

You need add use-permission in AndroidManifest file, and you should better check if you can r/w the file use canWrite() canRead() before use it.

I think your SD card is currently connect to your computer so it will cause problem. I get in this situation before. You need to unmount sd card first

it requires permissions in manifest file, add this line to your manifest file
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Look at this Question Android saving file to external storage

in menifest file add permission to write file
pls try with file name as below
String filename="aa.txt";
String filepath= getFilesDir().getAbsolutePath();
File Filseting = new File(filepath, filename);

File upload Android defining path

I'm trying to upload a file to web server.But i'm having file not found exception.I think error comes from the path which i defined.my path is Sd card/Android/data/ic_launcher.png
Can anyone help me to give the path correctly.Please guys....

Try this.
File file = new File(Environment.getExternalStorageDirectory(), "Android/data/ic_launcher.png");
add this permission in manifest file.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

String SD_Card_Path = Environment.getExternalStorageDirectory().toString();
String Complete_Path = SD_Card_Path + "/Android/data/ic_launcher.png";
This is the tested code Add External Storage Read/Write Permission in your AndroidMenifest and your code will be run.

Read CSV File in android app

Thanks in advance,
How to read csv file from sdcard.
and how to give the permission of read/writer for file in android application.
thanks again.

This might be helpful to you
File dir = Environment.getExternalStorageDirectory();
File f = new File(dir, "path/dir1/sdcard.ext");
I don't know about the permissions but the above will certainly allow you to read the file from the sdcard in the path directory.