match arraylist index and Value of array in android

Question

I want to match index values of ArrayList elements with values from an int array. Pos array contains selected items, while the ArrayList object contains all items.

I want a new ArrayList containing selected items only, but the if condition turns out to be always false

        for (int i = 0; i < Pos.length; i++) {
            Category state = stateList.get(i);

            if(stateList.indexOf(i)==Pos[i]) {
                Toast.makeText(getApplicationContext(),"match",Toast.LENGTH_LONG).show();
                Drawer.add(state);
            }
        }
        Toast.makeText(getApplicationContext(),Drawer.size(),Toast.LENGTH_LONG).show();

its can't give output , Don't match index value and Array Value — Aanal Shah
– Aanal Shah, Commented Feb 11, 2016 at 10:15
statelist.indexof(i) give -1 value and, position give proper values — Aanal Shah
– Aanal Shah, Commented Feb 11, 2016 at 10:26

Neerajlal K · Accepted Answer · 2016-02-11 10:32:25Z

1

You have selected indices from stateList in the Pos array. So just get the items in stateList using the Pos array. Try this code.

for (int i = 0; i < Pos.length; i++) {
    Drawer.add(stateList.get(Pos[i]));
}
Toast.makeText(getApplicationContext(),Drawer.size(),Toast.LENGTH_LONG).show();

answered Feb 11, 2016 at 10:32

Neerajlal K

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Comments

Shoeb Siddique · Accepted Answer · 2016-02-11 10:32:59Z

1

PLease try this -

     if (i == Pos[i]) {
    Toast.makeText(getApplicationContext(), "match", Toast.LENGTH_LONG).show();
    Drawer.add(state);
}

answered Feb 11, 2016 at 10:32

Shoeb Siddique

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1 Comment

Shoeb Siddique Over a year ago

yeah Pleasure. :)

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