There's a problem i'm fighting with for two days. Using FileWriter I try to save data into txt file. File is saved by an application but it's always empty.
b1.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
try {
boolean usunieto = true;
boolean stworzono = false;
String t_magazyn = e_magazyn.getText().toString();
String nazwa = e_nazwa.getText().toString();
if(!t_magazyn.trim().equals("")){
@SuppressLint("SdCardPath") File plik = new File("/sdcard/"+nazwa+".txt");
// jeśli plik nie istnieje, stwórz go
if(plik.exists()){
usunieto = plik.delete();
Toast.makeText(getApplicationContext(),"Plik został usunięty!",Toast
.LENGTH_SHORT).show();
}
if(usunieto){
stworzono = plik.createNewFile();
Toast.makeText(getApplicationContext(),"Plik utworzony!",Toast
.LENGTH_SHORT).show();
}
if(!usunieto||!stworzono){
Toast.makeText(getApplicationContext(),"Apka dalej cie olewa xD",Toast
.LENGTH_SHORT).show();
}
//THIS PART DOESN'T WORK AS INTENDED
FileWriter wpis = new FileWriter(plik.getName(),true);
BufferedWriter bufor = new BufferedWriter(wpis);
bufor.write(e_magazyn.getText().toString());
i_e_magazyn.setText(e_magazyn.getText().toString());
bufor.close();
}
}
catch(IOException e) {
e.printStackTrace();
}
}
});
e_magazyn,e_nazwa are EditText fields and i_e_magazyn is TextView field
In b2 button which isn't visible here this line of code works.
i_e_magazyn.setText(e_magazyn.getText().toString());
I tried a lot of actions to update data into file but it looks like after creating a new FileWriter variables are made empty
How do i make it work?
You just need to write this line
FileWriter wpis = new FileWriter(plik,true);
Instead of
FileWriter wpis = new FileWriter(plik.getName(),true);