How to pass a String variable from one method to main method

Question

I am a new to java and android, actually i am stuck in a problem, before down-voting or marking it as a duplicate , try to help me to solve this storm...

I will describe my concept. I have a web-view fragment in that i have a button . when ever the user click the button while browsing , the current web address will pass from fragment to main activity by using interface like this. i want to make that passed web addresses as the default address when the next time user open the app(it should load that web address which is passed from fragment last time).

this is how is how i am passing the web address to URL from fragment to main activitY

  @Override
public void onHomeClick(String pasedurl) {

    // now URL having the web address
    URL= pasedurl;

//trying to save URL for the next time use

final String MY_PREFS_NAME = "MyPrefsFile";
     SharedPreferences.Editor editor = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE).edit();
    editor.putString("name", URL);
    editor.commit();


    SharedPreferences prefs = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE);
    String restoredText = prefs.getString("name", null);
    if (restoredText == null) {


        String name = prefs.getString("name", "No name defined");

        Toast.makeText(getApplicationContext(), name, Toast.LENGTH_LONG).show();

    }

The next step i took is passing a url string from main activity to web fragment so that next time it will open the web address which is saved before

this is how i am passing string url from main activity to fragment

  @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState)

   //passing the sting 'name'

    Bundle bundle=new Bundle();
    bundle.putString("url", name);
    final Radio radio=new Radio();
    radio.setArguments(bundle);


    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);


   //other stuff

    }

and i am receiving in web-fragment like this`

final WebView view=(WebView) rootView.findViewById(R.id.webView);
    String url = getArguments().getString("url");
    view.loadUrl(url);

So now i will tell you what i want . I want to pass the saved string url from shared preference to the bundle.so web fragment can catch it,or i want to make toast from main activity like

 Toast.makeText(getApplicationContext(), name, Toast.LENGTH_LONG).show();

so i will get to know the last time saved url, how can i do that ? please help me........

why you want to pass sharedpreferences to bundle? sharedpreferences also can be access in fragment.. — ZeroOne, May 05 '17 at 03:42
SharedPreferences shared = getActivity().getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE); String url = shared.getString("name",null); — ZeroOne, May 05 '17 at 03:50

ZeroOne · Accepted Answer · 2017-05-05T04:03:49.163

2

sharedpreferences also can be access in fragment

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    return inflater.inflate(R.layout.your_fragment, container, false);
}

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
     super.onViewCreated(view, savedInstanceState);
    final String MY_PREFS_NAME = "MyPrefsFile";
     SharedPreferences shared = getActivity().getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE); 
     String url = shared.getString("name",null); 

     final WebView view=(WebView) view.findViewById(R.id.webView);
     view.loadUrl(url);

}

edited May 05 '17 at 04:03

answered May 05 '17 at 03:56

ZeroOne

8,996
4
27
45

final String MY_PREFS_NAME = "MyPrefsFile"; – ZeroOne May 05 '17 at 04:03
i am only adding in oncreate ' SharedPreferences shared = getActivity().getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE); String url = shared.getString("name",null);' is that fine ?? – Jaison Joseph May 05 '17 at 04:05
so what will do , if there is no shared preference initially ? – Jaison Joseph May 05 '17 at 04:08
brother wait.. after uninstalling the app, its not loading any page, what to do ? – Jaison Joseph May 05 '17 at 04:18
1

it is because after you fresh install there is no data in sharedPreferences.. you need to set it back the value before pass it to your webview – ZeroOne May 05 '17 at 04:45

score 1 · Answer 2 · answered May 05 '17 at 03:53

1

Sharedpreferense will what the data through the intire app so you can just add in the sharedpreferense with the same reference and regrab the string variable. So just put this line where you want to grab the data again: SharedPreferences prefs = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE); String restoredText = prefs.getString("name", null);

answered May 05 '17 at 03:53

Maverick Tolley

61
1
5

Cannot resolve method 'getSharedPreferences(?, int)' and Cannot resolve symbol 'MY_PREFS_NAME' – Jaison Joseph May 05 '17 at 04:02
Try adding getActivity.getSharedPreference(); – Maverick Tolley May 05 '17 at 04:07

How to pass a String variable from one method to main method

2 Answers2