editText field is required before moving on to another Activity

Question

I have validation for editText. If the editText field is empty it should fail validation and stop the user moving on to another Activity,

Answer 1

I faced a similiar problem. In my case, I had a lot of Edittexts to verify, some them was child of another layouts. Tip: all views must be in same root view. So, to be simple:

...
LinearLayout viewGroup = (LinearLayout) findViewById(R.id.viewGroup);
checkFieldsRequired(viewGroup);
...

public boolean checkFieldsRequired(ViewGroup viewGroup){

    int count = viewGroup.getChildCount();
    for (int i = 0; i < count; i++) {
        View view = viewGroup.getChildAt(i);
        if (view instanceof ViewGroup)
            checkFieldsRequired((ViewGroup) view);
        else if (view instanceof EditText) {
            EditText edittext = (EditText) view;
            if (edittext.getText().toString().trim().equals("")) {                  
                edittext.setError("Required!");                 
            }
        }
    }

    return false;
}