CODEWITHSUNDEEP
androidserialization
n0hepe
n0hepe

Reputation: 188

Saving object to file on internal storage (Android)

I tried this:

public class People implements Serializable  {

String name;

public People(String name)
{
    this.name = name;
}

public String getName()
{
    return name;
}

public void saveAsObject(People p) throws FileNotFoundException, IOException
{
    try 
    {
        ObjectOutputStream os = new ObjectOutputStream(new FileOutputStream(new File("test","test.dat") ));
        os.writeObject(p);
        os.close();
        System.out.println("Sucess");
    }

    catch(IOException e)
    {
        System.out.println(e);
    }

}

}

I created that folder manually. It throws this eror: "java.io.FileNotFoundException: /test/test.txt: open failed: ENOENT" (No such file or directory)

When i tried 

 new FileOutputStream("text.dat")

it throws java.io.FileNotFoundException: EROFS (Read only file system)

This is my main class:

 public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
            People p = new People("Ray");
    try {
        p.saveAsObject(p);
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

Upvotes: 1

Views: 3736

Answers (2)

Waxrat
Waxrat

Reputation: 2185

Your app's default current working directory is "/", which you won't have permission to write to.

Upvotes: 0

Budius
Budius

Reputation: 39856

this new File("test","test.dat") is not a valid way of getting a file path on Android.

try this:

new File(Environment.getExternalStorageDirectory(), "/data.dat");

Upvotes: 1

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