Question

I make a login form with dynamic field validation. I have 3 fields username, email & password & all of these field are required. When field length = 0, I set error

editText.setError( getText(R.string.cannot_be_blank) );

and this code works fine, but when I change the orientation, all the errors disappear
How to save error state?

Thanks.

Answer 1

When the orientation is changed the framework will recreate the Activity by calling onCreate(Bundle savedInstanceState). Before the switch in orientation the onSaveInstanceState(Bundle outState) method will be called if it is overridden in your Activity.

You can save the state of your errors in the Bundle passed into the onSaveInstanceState method. This bundle is passed to your onCreate() method as the savedInstanceState Bundle.

Therefore you need to override the onSaveInstanceState method in your Activity as follows (saving the state of your errors):

@Override
protected void onSaveInstanceState(Bundle outState) {
    outState.putBoolean("errorOccurred", errorState);
    super.onSaveInstanceState(outState);
}

Then in your onCreate method check if the savedInstateState Bundle is null or not. If not, you can retrieve the values out of it with the following code:

boolean errorOccurred = false;  
if (savedInstanceState != null) {
    errorOccurred = savedInstanceState.getBoolean("errorOccurred"); 
}