How to add Two Numberpicker values in andriod

I have two number pickers Numberpicker1 and Numberpicker2
Numberpicker 1 => numberpicker1.setminvalue(1) and numberpicker1.setmaxvalue(7)
Numberpicker 2 => numberpicker2.setminvalue(0) and numberpicker2.setmaxvalue(12)

The output is not showing displaying unfortunately stopped app gets crashed
pls help out.And even my onclick button code is not working error i am unable to rectify.i dont have much knowledge about coding pls correct my code and send here

public class MainActivity extends AppCompatActivity {
NumberPicker pick1,pick2;
Button btnsubmit;

@override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

pick1 = (NumberPicker)findViewById(R.id.picker1);
pick2 = (NumberPicker)findViewById(R.id.picker2);

pick1.setMinValue(1);
pick1.setMaxValue(7);
pick2.setMinValue(0);
pick2.setMaxValue(12);

btnsubmit.setOnClickListener(new View.OnClickListener() {
@override
public void onClick(View v)
{
try
{

}
catch (Exception e)
{
e.getMessage();
}
}
});

}
}

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