Can someone please tell me if what I'm doing is correct?
File directoryToStore;
directoryToStore = getBaseContext().getExternalFilesDir("MyFiles");
Bitmap b = ThumbnailUtils.createVideoThumbnail(directoryToStore + "/" + SavedVideoName, 3);
File newFile = new File(directoryToStore, SavedVideoName.replace(".mp4", ".jpg"));
FileOutputStream outputStream = null;
try {
outputStream = new FileOutputStream(newFile);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
b.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);
try {
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
I'm trying create a thumbnail from a video, but for some the FileOutputStream returns null.
I have checked the path of File newFile = new File(directoryToStore, SavedVideoName.replace(".mp4", ".jpg")); and it returns the correct path.
The video exists at the location I have given and I have permissions. I can't understand why it is gives me a null pointer?
According to this post, new FileOutputStream() will try to create a new file if it doesn't exist already. From the docs:
If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.
When you are debugging (at least in Android Studio), if you add a breakpoint and hover over newFile, it shows the file path. However, it doesn't show any details about the file, because the file doesn't (shouldn't) exist yet. You could try newFile.createNewFile() as suggested in the linked post, to confirm you are able to write the file first.
Related
I just started to work with files today with Android and have been pulling my hair out all day. This throws a FileNotFoundException:
public void writeConfig(){
try {
File file = new File(Environment.getExternalStorageDirectory() + "/" + "AppName", "TimetableConfiguration");
if (!file.mkdirs()) {
P.rint("Couldn't create directory");
}
FileOutputStream fileOutputStream = new FileOutputStream(file);
fileOutputStream.write(getActivity().getSharedPreferences("periods", MODE_PRIVATE).getString("periods", null).getBytes());
fileOutputStream.close();
} catch (FileNotFoundException e) {
P.rint("Didn't find file");
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
Any ideas?
I notice that instead of creating a file, it creates a child folder. Why is it doing this?
Thanks for any help :)
FileNotFoundException: Creates child folder instead of file
Yes. That is what you do.
You first create with mkdirs() a directory with a certain name.
After that you try to create a file with the same name which is impossible as there cannot be two files or directories with the same name.
So have a look and you will find that directory.
Well you had deduced most all yourself already. Now try to understand your code.
if (!file.mkdirs()) {
P.rint("Couldn't create directory");
You will see that printed every time you repeat the code. You should have seen this too. And have told us.
You should only call mkdirs if the directory does not exist yet.
I am attempting to display PDFs to the user in their browser using a web service. Once they pass in the URL containing the variables needed. My program first downloads the PDF to local storage then proceeds to copy it to the stream and displays it. Once the viewer is able to view the PDF we wish to delete the file locally so that we do not wind up storing every file searched for. I have managed to accomplish most of this task however I am having issues deleting the file once it is displayed to the user.
Even when I attempt to manually delete the file I receive the "Currently in use in the Java SE Binary" message
Code below:
File testFile = new File("C:\\Users\\stebela\\workspace\\my-app\\invoice"+invNum+".pdf");
try
{
ServletOutputStream os = res.raw().getOutputStream();
FileInputStream inputStr = new FileInputStream(testFile);
IOUtils.copy(inputStr, os);
os.close();
inputStr.close();
//finished settings
res.status(200);
testFile.delete();
} catch (IOException e)
{
System.out.println(e.getMessage());
}
If you don't write to the file, you'r code should work.
If you call inputStr.close(); the file is no longer used by java and it can be deleted.
Pleace check, if your file is not used by any other programm. It's the best if you reboot your PC.
If it still not works, it would be interessting to know, what res is and if your file get's sendet.
I've read this part of the documentation and i think this should solve your problem.
It reads the file into a String and change the header for png images. As the http Body it uses the String of the file.
Make sure, if you change the response type, you have to change the line res.type("image/png"); to the new one.
Here you find the most common ones
File testFile = null;
try {
testFile = new File("C:\\Users\\stebela\\workspace\\my-app\\invoice"+invNum+".png");
FileInputStream fin = new FileInputStream(testFile);
int charAsInt = 0;
String httpBody = "";
while((charAsInt = fin.read()) != -1){
httpBody +=(char)charAsInt;
}
fin.close();
res.body(httpBody);
res.type("image/png");
res.status(200);
testFile.delete();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Hope someone can help me.
I tried few ways of downloading files from URL but everything gives the same result - the file is there, including the file extension, but I can't open and read the file. The last way I use is
else if (!myFile.exists()) { // if file not exist
try {
String downloadPath = download_file_path+fileName;
downloadPath = URLEncoder.encode(downloadPath, "UTF-8").replace("+", "%20");
new DefaultHttpClient().execute(new HttpGet(downloadPath))
.getEntity().writeTo(
new FileOutputStream(new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), fileName))
);
} catch (IOException e) {
e.printStackTrace();
}
I tried every solutions available in SO but can't solve the problem. Please help.
i have below code that work in some phone and dont work in some other phone.
my code is for saving an image.
String path = Environment.getExternalStorageDirectory().toString();
path += "/";
File fff=new File(path + "/xalopex/Mobile/");
if (!fff.exists())
fff.mkdirs();
path += "xalopex/Mobile/";
path += "lg";
File filename;
try {
filename = new File(path + ".jpg");
FileOutputStream out = new FileOutputStream(filename);
MyImageBitMap.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
MediaStore.Images.Media.insertImage(getContentResolver(),
filename.getAbsolutePath(), filename.getName(),
filename.getName());
} catch (Exception e) {
e.printStackTrace();
//this part will run
// e is storage/emulated/0/xalopex/Mobile/lg.jpg open faild:ENOENT (no such file or directory)
}
where i am wrong ?
How i can fix it?
I would hazard a guess and say its because you need to be accessing /storage/emulated/legacy instead of /storage/emulated/0
I could be wrong.. but I see there are no accepted answers so I'll give this a try :)
I am trying to write some message to text file. The text file is in the server path. I am able to read content from that file. But i am unable to write content to that file. I am getting FileNotFoundException: \wastServer\apps\LogPath\message.txt (Access Denied).
Note: File has a read and write permissions.
But where i am doing wrong. Please find my code below.
Code:
String FilePath = "\\\\wastServer\\apps\\LogPath\\message.txt";
try {
File fo = new File(FilePath);
FileWriter fw=new FileWriter(fo);
BufferedWriter bw=new BufferedWriter(fw);
bw.write("Hello World");
bw.flush();
bw.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Please help me on this?
Please check whether you can access the apps and LogPath directory.
Type these on Run (Windows Key + R)
\\\\wastServer\\apps\\
\\\\wastServer\\apps\\LogPath\\
And see whether you can access those directories from the machine and user you are executing the above code.
You don't have write access to the share, one of the directories, or the file itself. Possibly the file is already open.
After this line
File fo = new File(FilePath);
try to print the absolute path
System.out.println( fo.getAbsolutePath() );
And then check whether the file exists in that location, instead of directly checking at
\\\\wastServer\\apps\\LogPath\\message.txt
So , you will know, where the compiler is searching for the file.