How to pass ArrayList using putStringArrayListExtra()

Question

Hi I want to pass an Arraylist from one activity to another. I use putStringArrayListExtra(), but there shows an error : \"The m

Answer 1

You have to define ArrayList of type String. you can't pass Generic ArrayList in putStringArrayListExtra. Below is the correct code.

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ArrayList<String> al = new ArrayList<String>();
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 list_bundle.putStringArrayListExtra("lists",al); 
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Now access this ArrayList in other activity like this.

ArrayList<String> cl= new ArrayList<String>();
cl =getIntent().getExtras().getStringArrayList("lists");

Answer 2

try below one to pass 1-D array to Arraylist in extras

ArrayList<String> al = new ArrayList<String>();
String arr[] = {"Zero", "One", "Two"}; 
//Convert string array to a collection 
Collection l = Arrays.asList(arr);
al.addAll(l); 
i.putStringArrayListExtra("ar", al);

Answer 3

First Activity :

 ArrayList<String> al = new ArrayList<String>();
    int ROWS = 2;
                        int COLS = 1;
                        String[][] a2 = new String[ROWS][COLS];
                        a2[0][0]="one";
                        a2[1][0]="two";
                        for(int i=0;i<ROWS;i++)
                        {
                            for(int j=0;j<COLS;j++)
                            {
                                al.add(a2[i][j]);
                            }
                        }
     i.putStringArrayListExtra("ar", al);
                        i.putExtra("ROWS", ROWS);
                        i.putExtra("COLS", COLS);

Second Activity :

ArrayList<String> test = new ArrayList<String>();
test=getIntent().getExtras().getStringArrayList("ar");
        int ROWS=getIntent().getExtras().getInt("ROWS");
        int COLS=getIntent().getExtras().getInt("COLS");
        String[][] a2 = new String[ROWS][COLS];
        int index=0;
        for(int i=0;i<ROWS;i++)
        {
            for(int j=0;j<COLS;j++)
            {
                a2[i][j]=test.get(index++);
            }
        }

Answer 4

Try this It worked for me

1st Activity

ArrayList<String> ar=new ArrayList<String>();
ar.add("Apple");
ar.add("Banana");

Intent i=new Intent(this,Route.class);
i.putStringArrayListExtra("list", ar);
startActivity(i);

2nd Activity

ArrayList<String> ar1=getIntent().getExtras().getStringArrayList("list");