<EditText
android:singleLine="true"
android:imeOptions="actionGo"/>

editText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
    @Override
    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
        if(actionId== EditorInfo.IME_ACTION_GO){
            //perfrom your action
        }
        return false;
    }
});