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problem when upload file in play framework

I tried uploading a file, and placed the file in the "public / images" directory and it worked, but the file I uploaded was zero in size and certainly couldn't be opened
public Result upload() throws IOException {
Http.MultipartFormData<File> requestBody = request().body().asMultipartFormData();
Http.MultipartFormData.FilePart<File> profile_pic = requestBody.getFile("profile_pic");
String dirPath = "public/images/";
if(profile_pic != null) {
String name = profile_pic.getFilename();
File file = profile_pic.getFile();
System.out.println(file);
File theDir = new File(dirPath);
if (!theDir.exists()) {
boolean result = false;
try {
theDir.mkdirs();
result = true;
} catch (SecurityException se) {
// handle it
}
if (result) {
System.out.println("DIR created");
}
}
try {
File filex = new File(dirPath + name.toLowerCase());
filex.createNewFile();
file.renameTo(filex);
}catch (Exception e) {
// TODO: handle exception
}
return ok("File uploaded ");
}else {
return badRequest("Eroor");
}
}
this is my file after upload

I think creating a new file and renaming your old file to that name may cause trouble. I would recommend using the move method, see docs here.
Does your System.out.println(file); print what looks like a normal png file?

Image not overwriting on same name

I'm developing image editor app.. so each time the user have to save the image.
So first i inserted
String savedImageURL = MediaStore.Images.Media.insertImage(
getContentResolver(),
bitmap,
"Bird",
"Image of bird"
);
this code, but it creating new file instead of overwriting.
So i use another method
public String saveImage(String folderName, String imageName) {
String selectedOutputPath = "";
if (isSDCARDMounted()) {
File mediaStorageDir = new File(
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), folderName);
// Create a storage directory if it does not exist
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d("PhotoEditorSDK", "Failed to create directory");
}
}
// Create a media file name
selectedOutputPath = mediaStorageDir.getPath() + File.separator + imageName;
Log.d("PhotoEditorSDK", "selected camera path " + selectedOutputPath);
File file = new File(selectedOutputPath);
try {
FileOutputStream out = new FileOutputStream(file,true);
if (parentView != null) {
parentView.setDrawingCacheEnabled(true);
parentView.getDrawingCache().compress(Bitmap.CompressFormat.JPEG, 80, out);
}
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
return selectedOutputPath;
}
But it also didn't work.
Does anyone know about overwrite a bitmap in the same name?

Pass false as 2nd argument, to set append to false, so that you will overwrite the existing file:
FileOutputStream out = new FileOutputStream(file,false);
Check out the constructor documentation:
here is your code:
public String saveImage(String folderName, String imageName) {
String selectedOutputPath = "";
if (isSDCARDMounted()) {
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), folderName);
// Create a storage directory if it does not exist
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d("PhotoEditorSDK", "Failed to create directory");
}
}
// Create a media file name
selectedOutputPath = mediaStorageDir.getPath() + File.separator + imageName;
Log.d("PhotoEditorSDK", "selected camera path " + selectedOutputPath);
File file = new File(selectedOutputPath);
if (file.exists())
{
try {
file.delete();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
file.createNewFile();
FileOutputStream out = new FileOutputStream(file,false);
if (parentView != null) {
parentView.setDrawingCacheEnabled(true);
parentView.getDrawingCache().compress(Bitmap.CompressFormat.JPEG, 80, out);
}
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
return selectedOutputPath;
}

I also had this situation, but it turns out that this is not a problem with saving, but with displaying in ImageViev. I used Glide, and it turns out to be stored in the cache when outputting. And I did not change the name and path of the file. That is, I rewrote them. But Glide did not know this. He thought they were the same file. To fix this problem, I added the following
Glide.with(context)
.load(file)
.diskCacheStrategy(DiskCacheStrategy.NONE)
.skipMemoryCache(true)
.into(view)
If you also have this situation and these solutions helped you, I'm glad to this.

Android app creates file but can't find it

I'm having an issue that is preventing me from releasing my app, so maybe you can help. I have this code to create and write to a file:
#Override
public void onClick (View view){
final String memoryString = memory.getText().toString();
File file = new File(getApplicationContext().getFilesDir(), filename);
FileOutputStream fos = new FileOutputStream(file);
if (location != null) {
String s = location.toString() + " " + memoryString;
Log.d(null, s);
if(fos != null) {
Log.d(null, "fos not null");
fos.write(s.getBytes());
} else {
Log.d(null, "Output Stream is null");
}
fos.close();
Log.d(null, "file created!");
}
} catch (IOException e) {
e.printStackTrace();
}
my log is saying that it's creating the file. but when I go to access and read from said file, I get the error here that it doesn't exist:
try {
File memoryFile = new File(filename);
if(memoryFile.exists()){
revealMarkers(memoryFile);
Log.d(null, "revealed");
} else {
Log.d(null, "no file found");
}
} catch (FileNotFoundException ex) {
Log.d(null, "file not found");
}
Please help if you are able, I am very much stuck

Maybe this ?
try {
File memoryFile = new File(getApplicationContext().getFilesDir(), filename);
if(memoryFile.exists()){
revealMarkers(memoryFile);
Log.d(null, "revealed");
}else{Log.d(null, "no file found");}
} catch (FileNotFoundException ex) {
Log.d(null, "file not found");
}

How is it that you created a file with this statement
File file = new File(getApplicationContext().getFilesDir(), filename);
And then try to retrieve the file with this
File memoryFile = new File(filename);
Why can't you use the same statement. How is the second statement supposed to determine the directory containing the file?

How to save a file to a specific spot on the phone

I would like for my app to create a folder on the sd card and save a file in it. This is what I have right now that just saves it in my app data.
File file = new File(context.getExternalFilesDir(""), fileName);
FileOutputStream os = null;
try {
os = new FileOutputStream(file);
wb.write(os);
Log.w("FileUtils", "Writing file" + file);
success = true;
} catch (IOException e) {
Log.w("FileUtils", "Error writing " + file, e);
} catch (Exception e) {
Log.w("FileUtils", "Failed to save file", e);
} finally {
try {
if (null != os)
os.close();
} catch (Exception ex) {
}
}
How would I do that?
Alright so I did this. Am I even doing this right?
String fullPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "";
File file = new File(fullPath);
if (!file.exists()) {
file.mkdirs();
}
FileOutputStream os = null;
try {
os = new FileOutputStream(file);
wb.write(os);
Log.w("FileUtils", "Writing file" + file);
success = true;
} catch (IOException e) {
Log.w("FileUtils", "Error writing " + file, e);
} catch (Exception e) {
Log.w("FileUtils", "Failed to save file", e);
} finally {
try {
if (null != os)
os.close();
} catch (Exception ex) {
}
}

Your best option is to use Environment.getExternalStorageDirectory() to find the root path to use.
However, please note that this is not nessasarily the sd-card, from the docs:
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.
Example, just change your first line to be:
File file = new File(Environment.getExternalStorageDirectory(), fileName);
Need a directory?:
File dir = new File(Environment.getExternalStorageDirectory(), "yourdir");
dir.mkDirs();
File file = new File(dir, fileName);

Try this, Create file folder like this
String fullPath = Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/Foldername";
File dir = new File(fullPath);
if (!dir.exists()) {
dir.mkdirs();
}

Where will be a file created in android if I do it like this

This function creates a file but I can't figure out where is the file created and if someone has a solution to create a file in a particular directory from the external storage is very welcomed :) thanks a lot
private void writeFileToInternalStorage() {
String eol = System.getProperty("line.separator");
BufferedWriter writer = null;
try {
writer = new BufferedWriter(new OutputStreamWriter(openFileOutput("myfile", MODE_WORLD_WRITEABLE)));
writer.write("This is a test1." + eol);
writer.write("This is a test2." + eol);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (writer != null) {
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}

for query
Where will be a file created
it will create in Internal Storage as function name said and that will be like
/data/data/yourApp_package_as_in_manifest/ (can see in DDMS)
for query
if someone has a solution to create a file in a particular directory
from the external storage is very welcomed
as per link Write a file in external storage in Android
.........
** Method to check whether external media available and writable. This is adapted from
http://developer.android.com/guide/topics/data/data-storage.html#filesExternal */
private void checkExternalMedia(){
boolean mExternalStorageAvailable = false;
boolean mExternalStorageWriteable = false;
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
// Can read and write the media
mExternalStorageAvailable = mExternalStorageWriteable = true;
} else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
// Can only read the media
mExternalStorageAvailable = true;
mExternalStorageWriteable = false;
} else {
// Can't read or write
mExternalStorageAvailable = mExternalStorageWriteable = false;
}
tv.append("\n\nExternal Media: readable="
+mExternalStorageAvailable+" writable="+mExternalStorageWriteable);
}
/** Method to write ascii text characters to file on SD card. Note that you must add a
WRITE_EXTERNAL_STORAGE permission to the manifest file or this method will throw
a FileNotFound Exception because you won't have write permission. */
private void writeToSDFile(){
// Find the root of the external storage.
// See http://developer.android.com/guide/topics/data/data- storage.html#filesExternal
File root = android.os.Environment.getExternalStorageDirectory();
tv.append("\nExternal file system root: "+root);
// See https://stackoverflow.com/questions/3551821/android-write-to-sd-card-folder
File dir = new File (root.getAbsolutePath() + "/download");
dir.mkdirs();
File file = new File(dir, "myData.txt");
try {
FileOutputStream f = new FileOutputStream(file);
PrintWriter pw = new PrintWriter(f);
pw.println("Hi , How are you");
pw.println("Hello");
pw.flush();
pw.close();
f.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
Log.i(TAG, "******* File not found. Did you" +
" add a WRITE_EXTERNAL_STORAGE permission to the manifest?");
} catch (IOException e) {
e.printStackTrace();
}
tv.append("\n\nFile written to "+file);
}
and also add a WRITE_EXTERNAL_STORAGE permission to the manifest

It will be created on internal folder: /data/data/com.package.name/ You cannot access that folder using file browser.
If you want to easily access the file you can try to create it on SD card:
/*...*/
String baseDir = Environment.getExternalStorageDirectory().getAbsolutePath();
String fileName = baseDir + "/"+ "myFile.txt";
FileOutputStream writer = null;
try {
writer = new FileOutputStream(fileName);
writer.write("This is a test1." + eol);
/*...*/