Jak mogę napisać do pliku .txt w systemie Android?

Question

Mam aplikację, która musi odczytać i zapisać do pliku tekstowego. Mam to czytanie, ale nie mam tego pisania. Chodzi o to, że gdy kliknę przycisk zapisu na ekranie, jego zapisanie wszystkich informacji, które zostały wprowadzone do wyrażeń tekstowych w tablicy i zapisanie każdego segmentu tablicy do pliku tekstowego. To jest mój kod na części pisemnej:

public class AddOrModify extends Activity { 

    private Button Savebtn; 
    private Button Cancelbtn; 
    private EditText NameofRoute; 
    private EditText Address1; 
    private EditText City1; 
    private EditText State1; 
    private EditText Zip1; 
    private EditText Address2; 
    private EditText City2; 
    private EditText State2; 
    private EditText zip2; 




     @Override 
     public void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.add_or_modify); 

      Savebtn = (Button)findViewById(R.id.savebtn); 
      Savebtn.setOnClickListener(new btnlistenersave()); 

      Cancelbtn = (Button)findViewById(R.id.cancelbtn); 
      Cancelbtn.setOnClickListener(new btnlistenercancel()); 

     } 

     private class btnlistenersave implements View.OnClickListener{ 
      public void onClick(View v) { 

       NameofRoute = (EditText)findViewById(R.id.NameofRoute); 
       Address1 = (EditText)findViewById(R.id.editAddress1); 
       City1 = (EditText)findViewById(R.id.City1); 
       State1= (EditText)findViewById(R.id.State1); 
       Zip1 = (EditText)findViewById(R.id.Zip1); 
       Address2= (EditText)findViewById(R.id.Address2); 
       City2 = (EditText)findViewById(R.id.City2); 
       State2 = (EditText)findViewById(R.id.State2); 
       zip2 = (EditText)findViewById(R.id.Zip2); 

       //String[] mySettings ={NameofRouteinput,Address1input,City1input, State1input,Zip1input,Address2input,City2input,State2input,Zip2input,";"}; 


       // if(mySettings != null){ 
       try{ 

        String NameofRouteinput = NameofRoute.getText().toString(); 
        String Address1input = Address1.getText().toString(); 
        String City1input = City1.getText().toString(); 
        String State1input=State1.getText().toString(); 
        String Zip1input = Zip1.getText().toString(); 
        String Address2input =Address2.getText().toString(); 
        String City2input = City2.getText().toString(); 
        String State2input = State2.getText().toString(); 
        String Zip2input= zip2.getText().toString(); 
        OutputStreamWriter out = new OutputStreamWriter(openFileOutput("myaddress.txt",0)); 

        String[] mySettings ={NameofRouteinput,Address1input,City1input, State1input,Zip1input,Address2input,City2input,State2input,Zip2input,";"}; 


        for(int i =0; i < mySettings.length; i++) 
        out.write(mySettings[i]); 
        out.close(); 
       } 
       catch (java.io.IOException e){ 

       } 


       Intent i = new Intent(AddOrModify.this, Frontpage.class); 
       startActivity(i); 

      } 

     } 

     private class btnlistenercancel implements View.OnClickListener{ 

      public void onClick(View v) { 
       Intent i = new Intent(AddOrModify.this, Frontpage.class); 
       startActivity(i); 
      } 

     } 

} 

Answer 1

Można użyć FileOutputStream zamiast OutputStreamWriter, coś jak to:

File file = getFileStreamPath("test.txt"); 

if (!file.exists()) { 
    file.createNewFile(); 
} 

FileOutputStream writer = openFileOutput(file.getName(), Context.MODE_PRIVATE); 

for (String string: data){ 
    writer.write(string.getBytes()); 
    writer.flush(); 
} 

writer.close(); 

Sprawdź android docs.

Answer 2

roztworem Mari byłem coraz

 java.lang.IllegalArgumentException: contains a path separator 

następnie próbowałem następujące i pracował dla mnie

File root = new File(DIRECTORY_PATH); 
    File gpxfile = new File(root, "samples.txt"); 
    FileWriter writer = new FileWriter(gpxfile); 
    writer.append("First string is here to be written."); 
    writer.flush(); 
    writer.close(); 

można pętla to napisać wiele linii