Incompatible types in string

Resources r1 = getRes开发者_如何学JAVAources();
String[] refrigerant = r1.getStringArray(R.array.refrigerant);

if (refrigerant == "")
{
    if (et1.getText().toString() == refrigerant[i3]
    {
         flag = true;                               
    }

I got the error incompatible operand types String[] and string please give me solution.

refrigerant is an array, but here refrigerant == "" you compare and array with "", which is not possible. You could check for null and refrigerant.length >0

If refrigerant is an String array you can not compare it as an empty String.

Try

if(refrigerant == null || refrigerant.length == 0){
}

Note also that comparing Strings using == as in your second if clause will very often not work, as it tests object identity. You usually want to use string1.equals(string2).

looks like you are trying to compare a string array to a string in your first "if" statement