Convert number in textview to int

Question

So, I am messing around with java/android programming and right now I am trying to make a really basic calculator. I am hung up on this issue though. This is the code I have r

Answer 1

You can read on the usage of TextView.

How to declare it:

TextView tv;

Initialize it:

tv = (TextView) findViewById(R.id.textView);

or:

tv = new TextView(MyActivity.this);

or, if you are inflating a layout,

tv = (TextView) inflatedView.findViewById(R.id.textView);

To set a string to tv, use tv.setText(some_string) or tv.setText("this_string"). If you need to set an integer value, use tv.setText("" + 5) as setText() is an overloaded method that can handle string and int arguments.

To get a value from tv use tv.getText().

Always check if the parser can handle the possible values that textView.getText().toString() can supply. A NumberFormatException is thrown if you try to parse an empty string(""). Or, if you try to parse ..

String tvValue = tv.getText().toString();

if (!tvValue.equals("") && !tvValue.equals(......)) {
    int num1 = Integer.parseInt(tvValue);
}