How to determine if an input in EditText is an integer?

Question

Hi I\'m a newbie in Android Programming.

I\'m trying to build an activity which includes an edittext field and a button. When user type in an

Answer 1

Try this solution.

You need to add the properties android:nextFocusDown="@+id/nextedittext_id" and android:singleLine="true" in your edittexts.

For example:

And add the following code in your activity:

 editText1.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                String value=s.toString();
                    if(isNumeric(value)){
                        if(Integer.parseInt(value)>=100){
                            editText1.setFocusableInTouchMode(true);
                            editText1.setFocusable(false);
                        }
                }
            }

            @Override
            public void afterTextChanged(Editable s) {
            }
        });
        editText2.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                editText1.setFocusableInTouchMode(true);
                editText1.setFocusable(true);
            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });

isNumeric method is as same as above:

 public static boolean isNumeric(String str)
    {
        return str.matches("-?\\d+(.\\d+)?");
    }