How to load an internal stored object

Question

basically I saved an Object of the class Server, which works because I can read out names of the files I saved and put them in a spinner, but I can't seem to figure out how to load it back to be able to use it.

Following the code I used save it and try to load it

EditText serverName;
EditText textGetter;
String filename;

public void saveServer(View view) {
    filename = serverName.getText().toString() + ".bin";

    Server newServer = new Server();
    textGetter = (EditText) findViewById(R.id.nameEdit);
    newServer.setName(textGetter.getText().toString());
    textGetter = (EditText) findViewById(R.id.serverEdit);
    newServer.setAddress(textGetter.getText().toString());
    textGetter = (EditText) findViewById(R.id.userEdit);
    newServer.setUser(textGetter.getText().toString());
    textGetter = (EditText) findViewById(R.id.passwordEdit);
    newServer.setPassword(textGetter.getText().toString());

    try {
        ObjectOutputStream os = new ObjectOutputStream(new FileOutputStream(filename));
        os.writeObject(newServer);
        os.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

public void loadServer() {
    String selectedServer = String.valueOf(serverSpinner.getSelectedItem());
    selectedServer = selectedServer + ".bin";
    Server loadedServer = null;
    try {
        ObjectInputStream is = new ObjectInputStream(new FileInputStream(selectedServer));
        loadedServer = (Server) is.readObject();
        is.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
    //following Line is highlited by logcat at app.FtpActivity.loadServer(FtpActivity.java:69)
    Toast.makeText(this, loadedServer.getName(), Toast.LENGTH_SHORT).show();
}

Logcat Error:

10-15 14:37:14.119 16083-16083/app E/AndroidRuntime: FATAL EXCEPTION: main
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime: java.lang.NullPointerException
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at app.FtpActivity.loadServer(FtpActivity.java:69)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at app.FtpActivity$1.onItemSelected(FtpActivity.java:44)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at android.widget.AdapterView.fireOnSelected(AdapterView.java:895)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at android.widget.AdapterView.access$200(AdapterView.java:50)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:863)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at android.os.Handler.handleCallback(Handler.java:615)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:92)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:137)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:4921)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native Method)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Method.java:511)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
10-15 14:37:14.119 16083-16083/app E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native Method)

.

at app.FtpActivity$1.onItemSelected(FtpActivity.java:44) 

refers to the line in an onClick that only does

loadServer();