Saving data in application

Question

I have made an application. It\'s a button that shows the time you have pressed it. Every time I \"kill\" the application, the timer starts at 0 again (naturally). How can I mak

Answer 1

EDIT :

public class MainActivity extends ActionBarActivity {

    Button button1;
    Chronometer chromo;
    protected long time = 0;
    private SharedPreferences prefs;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button1=(Button)findViewById(R.id.button1);
        chromo=(Chronometer)findViewById(R.id.chromo);
        prefs = getSharedPreferences("prefs", Context.MODE_PRIVATE);
        long savedValue = prefs.getLong("my_chrono", 0);

        if(savedValue == 0)
            chromo.setBase(SystemClock.elapsedRealtime());
        else
            chromo.setBase(SystemClock.elapsedRealtime() + savedValue);

        button1.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // TODO Auto-generated method stub
                if(event.getAction() == MotionEvent.ACTION_DOWN){
                    chromo.start();
                }
                else if( event.getAction() == MotionEvent.ACTION_UP){
                    time =chromo.getBase()-SystemClock.elapsedRealtime();
                    chromo.stop();
                    prefs.edit().putLong("my_chrono", time).apply();
                }
                return true;
            }
    });
}}

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To use the shared preferences, initialize this in you onCreate

SharedPreferences prefs = getSharedPreferences("the_package_of_your_app", Context.MODE_PRIVATE);

Then, try to get the saved value

int my_saved_value = prefs.getInt("the_package_of_your_app.my_int_1", 0);
if(my_saved_value != 0)
    //your value of your timer was saved, do what's needed with it
else
    //there was no value saved, or the timer was at 0

Now you have to save that value when needed (when the timer is stopped, or the application is closed)

prefs.edit().putInt("the_package_of_your_app.my_int_1", my_value).apply();