Question

i have take array Arr_ActivityName_fack & Arr_ActivityName
like:

Arr_ActivityName_fack = new String[Arr_ActivityName.length];

but i need icrease array size when i click on button. so how can i do it?

Answer 1

Use Collections like ArrayList or if that’s not apropriate:

String[] tmp = Arr_ActivityName_fack;
Arr_ActivityName_fack = new String[Arr_ActivityName_fack.length + 1];
for (int i = 0; i < tmp.length; ++i) {
    Arr_AktivityName_fack[i] = tmp[i];
}

Or have a look at the link to arraycopy in the comments.