I have a fragment activity where I navigate to a search page, then back to the list with the result. Sometimes the activity needs to be re-created, so I am saving my instance data like so:
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
System.out.println("Saving instance state!");
// Save the instance data
// Filter data
Intent mIntent = new Intent(this, BasicMapDemoActivity.class);
filter.addFilterToIntent(mIntent);
outState = mIntent.getExtras();
// Save date data
int year = currentDate.getYear();
int month = currentDate.getMonth();
int day = currentDate.getDay();
outState.putInt("YEAR",year);
outState.putInt("MONTH",month);
outState.putInt("DAY",day);
// Location data
double latitude = mapLocation.latitude;
double longitude = mapLocation.longitude;
outState.putDouble("LATITUDE",latitude);
outState.putDouble("LONGITUDE",longitude);
// Other
outState.putString("VIEW_MODE",viewMode.toString());
outState.putString("SORT_TYPE",sortType);
outState.putInt("ZOOM", mapZoom);
}
Then I am attempting to restore the data in onCreate, but when I get there, the bundle is not null, but it does not contain any of the data I saved to it. All of the following get functions return zero (I confirmed that the data was non-zero at the end of the above code block):
Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// If we are 're-creating', then get the old instance data, otherwise set defaults
if(savedInstanceState == null)
{
// Set up default instance data
currentDate = new Date(115,4,1);
filter = new ObajoFilter();
filter.start = currentDate;
filter.end = new Date(115,4,1,23,59,0);
viewMode = ViewMode.MAP;
sortType = "Distance";
mapLocation = userLocation;
mapZoom = 16;
} else {
// Get date data
int year = savedInstanceState.getInt("YEAR");
int month = savedInstanceState.getInt("MONTH");
int day = savedInstanceState.getInt("DAY");
currentDate = new Date(year,month,day);
Any ideas on what could be emptying out the bundle? From what I understand, the savedInstanceData is only empty once the app is completely destroyed.
Because of this line outState = mIntent.getExtras();
Your outState points to different address mIntent.getExtras() , So it's empty
You should use outState.putXX directly without creating new object.
Are you storing the information that you want to retain in the onSaveInstanceState
something like the following
@Override
public void onSaveInstanceState(Bundle outState) {
outState.putParcelable("someobject", someobject);
outState.putBoolean("someboolean", someBoolean);
outState.putInt("someint", someInt);
super.onSaveInstanceState(outState);
}
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