Develop Reference

How to fix java.io.FileNotFoundException?

I try to access the file I had downloaded from flutter app and save it to external storage. I call the file and use it in java part but it show this error:
java.io.FileNotFoundException: /storage/emulated/0/Android/data/abc.xyz.qwe/files/mobilenet.tflite
I have tried to grant permission before call the file but it still not work (The file is exist, i have checked).

You start the file name with a slash. What directory is the file located in? If the storage folder is not in the root directory (/), then you won't be able to find the file. If storage is in the same place as the java file you're running, you should remove the first /

Deleting file from internal storage

How do I delete a file or folder on the internal storage in android with Delphi for android

You should use the TFile and TDirectory classes in the System.IOUtils unit.
For example:
TDirectory.Delete(<YOUR DIR PATH>);
or
TFile.Delete(<YOUR FILE PATH>);
Look in Embarcadero's documentation to get the right path of your files and folders on the various platforms:
Standard RTL Path Functions across the Supported Target Platforms

Referred from :
https://stackoverflow.com/a/27047502/5193608
https://stackoverflow.com/a/3554949/5193608
Main Part from both links:
You should always delete files that you no longer need. The most straightforward way to delete a file is to have the opened file reference call delete() on itself.
myFile.delete();
If the file is saved on internal storage, you can also ask the Context to locate and delete a file by calling deleteFile():
myContext.deleteFile(fileName);
Note: When the user uninstalls your app, the Android system deletes the following: All files you saved on internal storage All files you saved on external storage using getExternalFilesDir(). However, you should manually delete all cached files created with getCacheDir() on a regular basis and also regularly delete other files you no longer need.
Source : http://developer.android.com/training/basics/data-storage/files.html
Directly you can do is :
File dir = getFilesDir();
File file = new File(dir, "my_filename");
boolean deleted = file.delete();
Hope,it helps!

Android: find a file created in AVD

My application has a function of creating an xls file. After that I need to access that file manually. Now, the problem is, when i run the app on my device, I am able to locate the directories and my xls file in internal storage.
But when I try to run that in the AVD, I am not able to find the file. I also viewed file explorer but there also, I wasn't able to find my file.
Where does the file exists when created in AVD?
Below is the code :
File myDir = new File(Environment.getExternalStorageDirectory()+ "/PB/automation/mydir/");
myFolder.mkdirs();
File file = new File(myFolder, "demo.xls");
Trust me, there is nothing wrong with the code.
Below is the file explorer view :

Bad path trying to open file in Android

I'm trying to open a file with this:
document = builder.parse(new File("Data.xml"));
and I'm getting this message:
/Data.xml: open failed: ENOENT (No such file or directory)
and the file is in the root directory of the android project.

You are trying to open a file located in / (in linux this is the root directory of your file system). Instead you should be trying to create a file either on the SDCard or within the local storage directory for your application.
See this for more clarification: http://developer.android.com/guide/topics/data/data-storage.html

Move Data.xml into the assets folder of your project. Then to get a file reference, call getResources().getAssets().openFd( "Data.xml" )

You should probably try using a file input stream constructor for the builder instead, and use openFileInput( String fileName ) to get that, which does only use your app's data directory.
Using persistent storage
openFileInput()

Adobe Air for Android: Where is a xml file after instalation .apk file

An Air app which loading data from an external XML file (cfg.xml). I've published the Android/Air file, included the cfg.xml file in the Android package. Then I've installed on my SD Card(). App's reading xml file - working perfectly. But I need raw access(on my device) to cfg.xml I cannot find this file, checked everywhere(Rooted Phone). Where is it? Is there other solution? I need a file which is easy to read/write.

Use DDMS -> File Explorer and look for you app name in folders like data, ...

Solution:
Use fileStream instead of URLLoader
Change directory to SD Card e.g.
File.userDirectory.resolvePath("YourAppData/cfg.xml")
(No rooted phone needed)