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3

I have an app which gets data from an Arduino via bluetooth. The data are written into various ArrayLists and saved in files afterwards. Here is the code:

public boolean SaveValues(ArrayList<String> arrayList1, ArrayList<String> arrayList2, String valueType, String timeStart, String timeStop) 
 String filename = "File_" + valueType + "_" + timeStart + " bis " + timeStop;
 FileOutputStream outputStream = null;
 if(arrayList1.size() == 0)
 return false;

 try 
 outputStream = openFileOutput(filename, Context.MODE_PRIVATE);
 for (int i = 0; i < arrayList1.size(); i++) 
 outputStream.write(arrayList1.get(i).getBytes());
 outputStream.write("n".getBytes());
 outputStream.write(arrayList2.get(i).getBytes());
 outputStream.write("n".getBytes());
 
 outputStream.close();
 return true;
 catch (FileNotFoundException e) 
 e.printStackTrace();
 return false;
 catch (IOException e) 
 e.printStackTrace();
 return false;
 finally 
 if (outputStream != null) 
 try 
 outputStream.close();
 catch (IOException e) 
 e.printStackTrace();
 
 
 

I also save the valuetype, timeStart and timeStop into a database to be able to find the files. My problem is, that somehow the table where I save these values got deleted, so I am not able to find the files in the app. I would like to find the files maybe on the phone or something. Actually, I just need the filenames to be able to open them in the app, because they contain data I need. So, where can I find these files?

I have tried searching in the phones files. The files, and all the other apps data, should be saved in Android/data/package-name but I can't find the package name in Android/data. I also tried to search for "File_" in the files, because that's what every one of my files start with. But no file gets found.

java android storage

share|improve this question

edited Mar 26 at 9:03

Muhammad usman

1681111 bronze badges

asked Mar 26 at 8:22

ApriApri

7488 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  check what getFileStreamPath() returns
  
  – pskink
  Mar 26 at 8:27
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks! It returns /data/data/com.lis.lis/files/'filename'. But I have to create a new file and pass it to getFilesStreamPath(). I don't know how I can find the old files, because when I go to the files on the phone, there is no /data/data/com.lis.lis.
  
  – Apri
  Mar 26 at 8:43
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  you dint have to create anything, openFileOutput() docs say: "Open a private file associated with this Context's application package for writing. Creates the file if it doesn't already exist."
  
  – pskink
  Mar 26 at 8:47
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  My problem is, that I don't know the names of my files. The method getFileStreamPath() returns /data/data/com.lis.lis/files/'filename'. When I search in the phones internal storage, I can't find this path. There is just Android/data/, but in that directory I can't find the package-name of my app. So I don't know where I can find the files.
  
  – Apri
  Mar 26 at 8:54
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  read Context javadocs - it has a method that returns the parent folder - you can use that parent folder when calling one of File.list* methods
  
  – pskink
  Mar 26 at 8:55
  
  

  
  
  
  

 | 
show 8 more comments

3

I have an app which gets data from an Arduino via bluetooth. The data are written into various ArrayLists and saved in files afterwards. Here is the code:

public boolean SaveValues(ArrayList<String> arrayList1, ArrayList<String> arrayList2, String valueType, String timeStart, String timeStop) 
 String filename = "File_" + valueType + "_" + timeStart + " bis " + timeStop;
 FileOutputStream outputStream = null;
 if(arrayList1.size() == 0)
 return false;

 try 
 outputStream = openFileOutput(filename, Context.MODE_PRIVATE);
 for (int i = 0; i < arrayList1.size(); i++) 
 outputStream.write(arrayList1.get(i).getBytes());
 outputStream.write("n".getBytes());
 outputStream.write(arrayList2.get(i).getBytes());
 outputStream.write("n".getBytes());
 
 outputStream.close();
 return true;
 catch (FileNotFoundException e) 
 e.printStackTrace();
 return false;
 catch (IOException e) 
 e.printStackTrace();
 return false;
 finally 
 if (outputStream != null) 
 try 
 outputStream.close();
 catch (IOException e) 
 e.printStackTrace();
 
 
 

I also save the valuetype, timeStart and timeStop into a database to be able to find the files. My problem is, that somehow the table where I save these values got deleted, so I am not able to find the files in the app. I would like to find the files maybe on the phone or something. Actually, I just need the filenames to be able to open them in the app, because they contain data I need. So, where can I find these files?

I have tried searching in the phones files. The files, and all the other apps data, should be saved in Android/data/package-name but I can't find the package name in Android/data. I also tried to search for "File_" in the files, because that's what every one of my files start with. But no file gets found.

java android storage

share|improve this question

edited Mar 26 at 9:03

Muhammad usman

1681111 bronze badges

asked Mar 26 at 8:22

ApriApri

7488 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  check what getFileStreamPath() returns
  
  – pskink
  Mar 26 at 8:27
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks! It returns /data/data/com.lis.lis/files/'filename'. But I have to create a new file and pass it to getFilesStreamPath(). I don't know how I can find the old files, because when I go to the files on the phone, there is no /data/data/com.lis.lis.
  
  – Apri
  Mar 26 at 8:43
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  you dint have to create anything, openFileOutput() docs say: "Open a private file associated with this Context's application package for writing. Creates the file if it doesn't already exist."
  
  – pskink
  Mar 26 at 8:47
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  My problem is, that I don't know the names of my files. The method getFileStreamPath() returns /data/data/com.lis.lis/files/'filename'. When I search in the phones internal storage, I can't find this path. There is just Android/data/, but in that directory I can't find the package-name of my app. So I don't know where I can find the files.
  
  – Apri
  Mar 26 at 8:54
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  read Context javadocs - it has a method that returns the parent folder - you can use that parent folder when calling one of File.list* methods
  
  – pskink
  Mar 26 at 8:55
  
  

  
  
  
  

 | 
show 8 more comments

I have an app which gets data from an Arduino via bluetooth. The data are written into various ArrayLists and saved in files afterwards. Here is the code:

public boolean SaveValues(ArrayList<String> arrayList1, ArrayList<String> arrayList2, String valueType, String timeStart, String timeStop) 
 String filename = "File_" + valueType + "_" + timeStart + " bis " + timeStop;
 FileOutputStream outputStream = null;
 if(arrayList1.size() == 0)
 return false;

 try 
 outputStream = openFileOutput(filename, Context.MODE_PRIVATE);
 for (int i = 0; i < arrayList1.size(); i++) 
 outputStream.write(arrayList1.get(i).getBytes());
 outputStream.write("n".getBytes());
 outputStream.write(arrayList2.get(i).getBytes());
 outputStream.write("n".getBytes());
 
 outputStream.close();
 return true;
 catch (FileNotFoundException e) 
 e.printStackTrace();
 return false;
 catch (IOException e) 
 e.printStackTrace();
 return false;
 finally 
 if (outputStream != null) 
 try 
 outputStream.close();
 catch (IOException e) 
 e.printStackTrace();
 
 
 

I also save the valuetype, timeStart and timeStop into a database to be able to find the files. My problem is, that somehow the table where I save these values got deleted, so I am not able to find the files in the app. I would like to find the files maybe on the phone or something. Actually, I just need the filenames to be able to open them in the app, because they contain data I need. So, where can I find these files?

I have tried searching in the phones files. The files, and all the other apps data, should be saved in Android/data/package-name but I can't find the package name in Android/data. I also tried to search for "File_" in the files, because that's what every one of my files start with. But no file gets found.

java android storage

share|improve this question

edited Mar 26 at 9:03

Muhammad usman

1681111 bronze badges

asked Mar 26 at 8:22

ApriApri

7488 bronze badges

public boolean SaveValues(ArrayList<String> arrayList1, ArrayList<String> arrayList2, String valueType, String timeStart, String timeStop) 
 String filename = "File_" + valueType + "_" + timeStart + " bis " + timeStop;
 FileOutputStream outputStream = null;
 if(arrayList1.size() == 0)
 return false;

 try 
 outputStream = openFileOutput(filename, Context.MODE_PRIVATE);
 for (int i = 0; i < arrayList1.size(); i++) 
 outputStream.write(arrayList1.get(i).getBytes());
 outputStream.write("n".getBytes());
 outputStream.write(arrayList2.get(i).getBytes());
 outputStream.write("n".getBytes());
 
 outputStream.close();
 return true;
 catch (FileNotFoundException e) 
 e.printStackTrace();
 return false;
 catch (IOException e) 
 e.printStackTrace();
 return false;
 finally 
 if (outputStream != null) 
 try 
 outputStream.close();
 catch (IOException e) 
 e.printStackTrace();
 
 
 

java android storage

java android storage

share|improve this question

edited Mar 26 at 9:03

Muhammad usman

1681111 bronze badges

asked Mar 26 at 8:22

ApriApri

7488 bronze badges

share|improve this question

edited Mar 26 at 9:03

Muhammad usman

1681111 bronze badges

asked Mar 26 at 8:22

ApriApri

7488 bronze badges

edited Mar 26 at 9:03

Muhammad usman

1681111 bronze badges

edited Mar 26 at 9:03

Muhammad usman

1681111 bronze badges

asked Mar 26 at 8:22

ApriApri

7488 bronze badges

asked Mar 26 at 8:22

ApriApri

7488 bronze badges