how to use variable in onSaveInstanceState

Question

I just started learning programming at the android and I have a problem with using variable at onSaveInstanceState. This is my code:

int resultCode;

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

    if (savedInstanceState != null) {
        super.onRestoreInstanceState(savedInstanceState);

        int resultCode = savedInstanceState.getInt("resultCode");
    } 

    Button btnOpenWithResult = (Button) findViewById(R.id.btnOpenWithResult);
    btnOpenWithResult.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            Intent myIntent = new Intent(flashlight.this, ThirdActivity.class);
            startActivityForResult(myIntent, 1);
        }
    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    switch (resultCode) {
    case 1:   
         /** option 1  */            
        break;
    case 2:
         /** option 2 */
        break;
}

@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
    savedInstanceState.putInt("resultCode", resultCode);
    super.onSaveInstanceState(savedInstanceState);
}

I want to save the variable resultCode using onSaveInstanceState and after the resumption of activity once again to use it ...

(sorry for my level of English)

Be more specific, what exactly is your problem? Did you tried to assign value to resultCode. — Kiril Kirilov, Jan 15 '11 at 18:32
My problem is save state of variable resultCode (switch) to onSaveInstanceState. When I write: savedInstanceState.putInt("resultCode", resultCode); and after that try use: int resultCode = savedInstanceState.getInt("resultCode"); then variable resultCode it's empty — Cyren, Jan 15 '11 at 21:02
you should explore other options for permanent storage of data in memory. For instance, why not declare the variable as static or even on a static class apart? — Miguel Tomás, Feb 26 '21 at 08:54

score 6 · Answer 1 · answered Feb 21 '11 at 02:27

Cyren... 1) I see no reason to call super.onRestoreInstanceState in onCreate. It WOULD make sense to make that call in the method

public void onRestoreInstanceState(Bundle saved) {
    super.onRestoreInstanceState(saved);

2) The declaration:

   int resultCode = savedInstanceState.getInt("resultCode");

is "hiding" the variable:

int resultCode;

declared earlier. So there are two version of the variable resultCode with different scopes. Perhaps you mean to code:

int resultCode;

stuff here

    resultCode = savedInstanceState.getInt("resultCode");

Hope that helps, JAL

how to use variable in onSaveInstanceState

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