How to enable a preference in my android application when other preference is disabled ?

Question

Hi,

I have used PreferenceActivity to have preference in my android application. I want one preference say "pref 2" to be enabled when other preference say "pref 1" is NOT checked and "pref 2" to be disabled when "pref 1" is checked. i.e. exactly opposite of the android:dependancy attribute.

How can I do that?

Answer 1

I don't think there's any out-of-the-box solution for it, i.e. an inverted dependancy attribute. But there's always the click-listener:

preference1.setOnPreferenceClickListener(pref1_click);

....

private OnPreferenceClickListener pref1_click = new OnPreferenceClickListener() {
    public boolean onPreferenceClick(Preference preference) {
        preference2.setEnabled(!preference1.getEnabled());
    }
}

Answer 2

Android CheckBox??

---

I am assuming you are using the Android.widget.checkBox:

http://developer.android.com/reference/android/widget/CheckBox.html

Try this

 public class MyActivity extends Activity {
     protected void onCreate(Bundle icicle) {
         super.onCreate(icicle);

         setContentView(R.layout.content_layout_id);

         final CheckBox checkBox1 = (CheckBox) findViewById(R.id.checkbox_id);
         if (checkBox1.isChecked()) {
             checkBox2.setChecked(false);
         }
     }
 }

GoodLUCK!!

Answer 3

Read the following posts also:

http://stackoverflow.com/questions/2238356/onpreferencechangelistener-for-every-setting

and

http://stackoverflow.com/questions/531427/how-do-i-display-the-current-value-of-an-android-preference-in-the-preference-sum