[android-developers] Blank Edit Text Problem
I'm making kind of a calculator and everything is working fine.
Except when I leave one of the 4 EditText fields blank, the
application cracks (stops unexpectly).
How can I work this out?
It would be good to, when this happens (EditText blank) just put a
empty message at the destination.
Part of the code:
public void onClick(View arg0) {
double result = new
Double(input1.getText().toString())
* new Double(input3.getText().toString());
conta.setText(Double.toString(result));
double result2 = new
Double(input1.getText().toString())
* new Double(input3.getText().toString()) /
new Double(input4.getText().toString());
porpessoa.setText(Double.toString(result2));
double result3 = new
Double(input1.getText().toString())
* new Double(input2.getText().toString());
totallitros.setText(Double.toString(result3));
double result4 = new
Double(input1.getText().toString())
* new Double(input2.getText().toString())/
new Double(input4.getText().toString());
litrosporpessoa.setText(Double.toString(result4));
}
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Re: [android-developers] Blank Edit Text Problem
07.04.2011 15:57, Gabriel пишет: I'm making kind of a calculator and everything is working fine. Except when I leave one of the 4 EditText fields blank, the application cracks (stops unexpectly). How can I work this out? In general, when something like this happens, you use the debugger to find out what's really happening. Some ideas: When an EditText is empty, its getText returns null. When you call toString() on a null object, you get a NullPointerException. It would be good to, when this happens (EditText blank) just put a empty message at the destination. Take a look at this: http://developer.android.com/reference/android/widget/TextView.html#setError(java.lang.CharSequence) -- Kostya Vasilyev -- http://kmansoft.wordpress.com -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
