on back pressed from browser erases all my variable value

Question

I have button.Onclicking button it cals->choose Browser->on choosing Browser it loads my Url. on coming back from browser,all my previous locally set variable value are cleared.Variables have have values that are initialized with them. for ex:

i=0.

inside method i assign i=10

call browser now // i use this code to call browser

Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(strUrl));

intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);

startActivity(Intent.createChooser(intent, "Choose browser"));

it loads Url//

now on coming back to activity

Varialble (i) value becomes 0.

score 1 · Answer 1 · answered Jan 22 '13 at 11:12

1

declare your variable as static

static int i = 0;

this will not reset i to zero. on back press

answered Jan 22 '13 at 11:12

Qadir Hussain

8,721
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3

dirty hack. using onSaveState is cleaner – njzk2 Jan 22 '13 at 11:12
Qadir Hussain:Thanks for suggesting. I already declared all my variables as static and tried.but it opens the activity as if it is opening for the first time.. – Mohamed Hisham Ibn Hanifa Jan 22 '13 at 11:22
you have to make all variables to the default values when you are exiting you app. – Qadir Hussain Jan 22 '13 at 11:28
BUt it works fine with 4.0.3.it works fine with 2.3.3 emulator but create such bug inreal device with os 2.3.5 – Mohamed Hisham Ibn Hanifa Jan 22 '13 at 11:28

score 1 · Accepted Answer · answered Jan 22 '13 at 11:21

1

You need to understand the lifecycle of an Activity a little better. When you leave and return from an Activity state is not automatically persisted.

Android Lifecycle: http://developer.android.com/training/basics/activity-lifecycle/index.html

You should use onSavedInstanceState to restore your state when you return to your Activity. This is the code example the (linked) docs give:

static final String STATE_SCORE = "playerScore";
static final String STATE_LEVEL = "playerLevel";
...

@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
    // Save the user's current game state
    savedInstanceState.putInt(STATE_SCORE, mCurrentScore);
    savedInstanceState.putInt(STATE_LEVEL, mCurrentLevel);

    // Always call the superclass so it can save the view hierarchy state
    super.onSaveInstanceState(savedInstanceState);
}

answered Jan 22 '13 at 11:21

Booger

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Booger: ya its a better way.Actually i have a class inside a tab with activity group.on back pressed from browser it comes to starting level activity.TabActivty->Act 1(dint call finish())->Activ 2(dint call finish())->browser.on back pressed from browser it goes to TabActivty.Kindly help me with this – Mohamed Hisham Ibn Hanifa Jan 22 '13 at 11:26
BUt it works fine with 4.0.3.it works fine with 2.3.3 emulator but create such bug inreal device with os 2.3.5 – Mohamed Hisham Ibn Hanifa Jan 22 '13 at 11:29
This is (and always has been) the way to persist state in Android apps (so hasn't changed since the OS was introduced). Maybe you should start a new question with the problem you are now encountering (I think this one was sufficiently answered). – Booger Jan 22 '13 at 11:35

on back pressed from browser erases all my variable value

2 Answers2