Question

I am trying to write a very simple Android app.
It takes in 2 floating point numbers, does a calculation,

When I run my app, it crashes.

However, if I enter integers instead of floating point numbers, my
program doesn’t crash and does the correct calculation.

How to solve this problem? thx a lot

private Button.OnClickListener btnTranListener =new Button.OnClickListener(){

    public void onClick(View v){
        int amount=Integer.parseInt(editfc.getText().toString());
        double $=1.24*(double)amount;
        $ = (double) (((int)($ * 1000)) / 1000.0);
        outelc124.setText("ELC(1.24)= " + $ + " /pc");

Answer 1

Replace Integer.parseInt() with Double.parseDouble() and you will be able to handle numbers with decimals or integers.

You can also catch NumberformatException to keep it from crashing if they enter other bogus input.