Android cannot pass List of string arrays to service class [duplicate]

Question

I have this list of arrays that I need for my service to run

private List<String[]> commandList = new ArrayList<>();

Sample Data:

{"jump", "100", "100"}
{"walk", "100", "100"}
{"jump", "100", "100"}

I tried passing it through putExtra

Intent serviceIntent = new Intent(macroService.class.getName());
serviceIntent.putExtra("CommandList", commandList);
context.startService(serviceIntent);

however the putExtra method only allows me to input strings and string arrays. Is there any way to pass a list of string arrays?

You have to use intent.putStringArrayListExtra("key",commandList); and get it with getStringArrayListExtra("key"); — Opiatefuchs
– Opiatefuchs, Commented Jan 20, 2016 at 13:41
Or you can modify this answer by converting String[] to arrayList.....stackoverflow.com/questions/6355787/… — Opiatefuchs
– Opiatefuchs, Commented Jan 20, 2016 at 14:01

Prerak Sola · Accepted Answer · 2016-01-20 14:19:16Z

2

Use putStringArrayListExtra method instead of putExtra.

serviceIntent.putStringArrayListExtra("CommandList", commandList);

Also you can add your list in a HashMap and than pass this HashMap to next activity like below:

 HashMap<String, List> tmp = new HashMap<>();
 tmp.put("data", commandList);
 serviceIntent.putExtra("tmpData", tmp);

And to retrieve this data in the destination activity, you can do this:

 HashMap<String, List> tmp1 = (HashMap<String, List>) getIntent().getExtras().get("tmpData");
 List<String[]> testd = tmp1.get("data");

edited Jan 20, 2016 at 14:19

answered Jan 20, 2016 at 13:41

Prerak Sola

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3 Comments

LuxuryWaffles Over a year ago

I tried this, but it only allows me to put List<String> not List<String[]>

Prerak Sola Over a year ago

Can show the sample data of commandList?

Prerak Sola Over a year ago

See the updated answer.

gabga · Accepted Answer · 2016-01-20 13:55:06Z

0

From what I can see there is no function that does what you want, but, depending on how you are building and using the list, you could instead use a Bundle to collect your arrays and then add them to the intent with putExtras(Bundle extras).

answered Jan 20, 2016 at 13:55

gabga

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