问题
How can i measure length of string entered in the edittext while typing.Because i want to show a warning when the entered text length cross 100 character. Thanks in advance.
回答1:
You can use TextWatcher
to your EditText
to do that in Android.
Something like this
EditText test = new EditText(this);
test.addTextChangedListener(new TextWatcher() {
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
try {
//write your code here
} catch (NumberFormatException e) {
}
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
来源:https://stackoverflow.com/questions/3665470/measure-length-of-edittext-string-dynamically-in-android