android - How to change background image of EditText by SharedPreference choice? -

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i have been trying without success change background image of edittext using preference choice. don't know why isn't working. here code:

preferences = getsharedpreferences("prefborder", 0); string value = preferences.getstring("solid", null);  if (value.equals("solid")) {     edittext.setbackgroundresource(r.drawable.border);     // key not exist } else {     // handle value     edittext.setbackgroundresource(r.drawable.borderpkmnblue); }

here preference values borders:

<string-array name="border">     <item name="solid">solid</item>     <item name="pokemonblue">pokemon blue</item>  </string-array> <string-array name="bordervalues">     <item name="solid">drawable/border.png</item>     <item name="pokemonblue">drawable/borderpkmnblue.png</item>  </string-array>

try using setbackgrounddrawable() method instead

edittext.setbackgrounddrawable(r.drawable.border);

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