Android: How to pass MULTIPLE ArrayList<String> values and one ArrayList<LatLng> from one activity to another in a bundle? Not working

Question

I have several List<String> variables to pass from Splash to the Main activity:

1) I read somewhere that I can pass them as ArrayList<String> from Splash to Main, and it works... i.e. I can receive only the first ArrayList<String> variable. In my bundle below, I am not able to receive the second ArrayList<String>. (array_list2) Why?

2) How to pass ArrayList<LatLng> from one activity to another

First Activity:

Intent intent = new Intent(SplashActivity.this, MainActivity.class);
Bundle b=new Bundle();
b.putStringArrayList("array_list1",(ArrayList<String>)Names);     
b.putStringArrayList("array_list2",(ArrayList<String>)City);
b.putStringArrayList("array_list3",(ArrayList<String>)Country);
b.putStringArrayList("array_list4",(ArrayList<String>)Code);
b.putStringArrayList("array_list5",(ArrayList<LatLng>)coordinates); //ERROR in this line, type mismatch!
intent.putExtras(b);
startActivity(intent);

Second Activity:

Bundle b = getIntent().getExtras();
if (b != null) {
testList1 = b.getStringArrayList("array_list1");
testList2 = b.getStringArrayList("array_list2"); //THIS gives the same arraylist as testList1 and it is incorrect!
Log.e("TESTLIST1",testList1.toString()); //just using Log.e to view o/p as test
Log.e("TESTLIST2",testList1.toString());

Please answer both my questions. None of the other topics helped me, and I spent over 2 hours on this. Thank you.

Only ArrayList<String> is supported with method putStringArrayList and there is no other method for List<String> — Zac1
– Zac1, Commented Dec 3, 2015 at 6:32

Saritha G · Accepted Answer · 2015-12-03 06:51:11Z

2

putStringArrayList() will not support for ArrayList .

use

 putParcelableArrayList();

instead of

 putStingArrayList();

or else you can use direct method of intent.

Change your code somethng like this:

Intent intent = new Intent(SplashActivity.this, MainActivity.class);
Bundle b=new Bundle();
b.putStringArrayList("array_list1",(ArrayList<String>)Names);     
b.putStringArrayList("array_list2",(ArrayList<String>)City);
b.putStringArrayList("array_list3",(ArrayList<String>)Country);
b.putStringArrayList("array_list4",(ArrayList<String>)Code);

If you want to pass through bundle object use below line of code.

b.putParcelableArrayList("array_list5",(ArrayList<LatLng>)coordinates);

Otherwise pass through intent object.

intent.putParcelableArrayListExtra("array_list5",coordinates);
intent.putExtras(b);
startActivity(intent);

edited Dec 3, 2015 at 6:51

answered Dec 3, 2015 at 6:28

Saritha G

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9 Comments

Zac1 Over a year ago

Can you please explain for first, and second activities for both List<String> and ArrayList<LatLng>? Is "intent.putExtras(b);" correct?

Saritha G Over a year ago

intent,putExtras(b); is correct only..LatLng class is a parcelable class so should use putParcelableArrayList("array_list5",coordinates);

Zac1 Over a year ago

I get the error: "The method putParcelableArrayList(String, ArrayList<? extends Parcelable>) in the type Bundle is not applicable for the arguments (String, List<String>)" - also, pl. check the comments in my second activity... I am NOT receiving the second arraylist on the 2nd activity.

Saritha G Over a year ago

you should not type cast the arraylist. Anyway you are passing arrayList object only na..so type casting is not required.

Zac1 Over a year ago

I understand using putParcelableArrayList for LatLng. What is the syntax to use it for List<String> ? I have this error with your code - ""The method putParcelableArrayList(String, ArrayList<? extends Parcelable>) in the type Bundle is not applicable for the arguments (String, List<String>)""

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ρяσѕρєя K · Accepted Answer · 2015-12-03 06:58:24Z

1

Because LatLng class implements Parcelable interface, so instead of using Bundle. putStringArrayList use Bundle.putParcelableArrayList to send ArrayList which contains class object which is implementing Parcelable interface. Use

b.putParcelableArrayList("array_list5",coordinates);

How to use parcelable with List or ArrayList - What is the syntax?

Do it as:

ArrayList<String> arrCoordinates = new ArrayList<>(coordinates.size());
arrCoordinates.addAll(coordinates);
b.putParcelableArrayList("array_list5",arrCoordinates);

and get array_list5 as from Bundle

ArrayList<LatLng> coordinates = b.getParcelableArrayList("array_list5");

edited Dec 3, 2015 at 6:58

answered Dec 3, 2015 at 6:27

ρяσѕρєя K

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10 Comments

Zac1 Over a year ago

Can you please explain for first, and second activities for both List<String> and ArrayList<LatLng>? Is "intent.putExtras(b);" correct?

ρяσѕρєя K Over a year ago

@Zac1: my question is Why casting every object to ArrayList<String> ?

Zac1 Over a year ago

Only ArrayList<String> is supported with method putStringArrayList and there is no other method for List<String>

Zac1 Over a year ago

Yes, the second arraylist is not received by the second activity. Why? Please look at the comments in my code. ALSO, using parcelable on List<String> gives error, "The method putParcelableArrayList(String, ArrayList<? extends Parcelable>) in the type Bundle is not applicable for the arguments (String, List<String>)"

ρяσѕρєя K Over a year ago

@Zac1: ok then use (ArrayList<LatLng>)coordinates

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