How to add two number picker values

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Android

btnmale.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus)
            {

                Double ft = Double.valueOf(malepicker1.getValue());
                Double in = Double.valueOf(malepicker2.getValue());
                Double cm;
                cm = (ft * 12 + in) * 2.54;
                Toast toast=Toast.makeText(getApplicationContext(), (int)+cm,Toast.LENGTH_SHORT);
                toast.setMargin(50,50);
                toast.show();

            }
            <pre>});

What I have tried:

I am having two number pickers
malenumberoicker1 and malenumberpicker2
i want to do calculation of two values. when selected one value from number picker 1 and one value from number picker 2. should display result ?
i tried but not working app getting crash ?pls help out
code is above which i work out