error get string to array string & string to array int

Question

I am trying to write something like 1 + 1 in the edit text by pressing the app buttons and in converting the intgers to string in order to have them beside the rest of the intger ex: 11 not 1+1 (=2) i am getting error "FATAL EXCEPTION" with this line of code when pressing any number button

N[ii] = Integer.parseInt(stringNumber);

also error "FATAL EXCEPTION" in displayCalculations methode on pressing on the Sins x,+,- buttons

private void insertOrCheckNumber() {
    if (End == 0) {
        ii++;
    } else if (u == 0) {
        N = new int[ii];
        stringNumber = stringNumber + String.valueOf(num);
        displayCalculations(stringNumber);
        N[ii] = Integer.parseInt(stringNumber);
    }
    if (u == 1) {
        Sins = new String[iii];
        displayCalculations(Sins[iii]);
    }

}
private void clickNumber(int cN) {
    u = 0;
    num = cN;
    insertOrCheckNumber();
}

private void displayCalculations(String txt) {
    Calcs = String.valueOf(showCalcs.getText());
    showCalcs.setText(Calcs + " " + txt);
}

sander338 · Accepted Answer · 2016-03-05 12:13:31Z

1

In your activity

private ListView listview;

onCreate

listView = (ListView) findViewById(R.id.listView);  
ArrayList<> finalN = new ArrayList<y>;
customAdapter = new listAdapter(this,R.layout.listview_example, finalN);
        listView.setAdapter(customAdapter);

public class listAdapter extends ArrayAdapter<>
        {
            public listAdapter(Context context, int resource, List<> objects) {
            super(context, resource, objects);
        }
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            WindowManager wm = (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE);
            Display display = wm.getDefaultDisplay();
            Point size = new Point();

            View v = convertView;
            if (v == null) {
                LayoutInflater vi;
                vi = LayoutInflater.from(getContext());
                v = vi.inflate(R.layout.listview_example, null);
            }
               //Setting the value to the textfields
            return v;
        }

if you want my full code, ask and i'll send it ;)

answered Mar 5, 2016 at 12:13

sander338

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2 Comments

Dasser Basyouni Over a year ago

thanks but the list works as a string or integer if I used it without the adapter and the list view just as an value ?

sander338 Over a year ago

look here, developer.android.com/reference/java/util/ArrayList.html and another example examples.javacodegeeks.com/core-java/util/arraylist/…

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