[Android] List all setting items on the setting screen

environment

code

In the following example, all setting keys are logged. The key is that PreferenceGroup is mixed in with the listed Preference.

PreferenceScreen prefScreen = getPreferenceScreen();
int prefCount = prefScreen.getPreferenceCount();

for (int i = 0; i < prefCount; i++) {
	Preference pref = prefScreen.getPreference(i);
	if (pref instanceof PreferenceGroup) {
		setupPrefsRecursive((PreferenceGroup)pref);
	} else if (!Strings.isNullOrEmpty(pref.getKey())) {
		Log.i(TAG, pref.getKey());
	}
}

private void setupPrefsRecursive(PreferenceGroup prefGroup) {
	int prefGroupCount = prefGroup.getPreferenceCount();
	for (int i = 0; i < prefGroupCount; i++) {
		Preference pref = prefGroup.getPreference(i);
		if (pref instanceof PreferenceGroup) {
			setupPrefsRecursive((PreferenceGroup)pref);
		} else if (!Strings.isNullOrEmpty(pref.getKey())) {
			Log.i(TAG, pref.getKey());
		}
	}
}

If you have the following settings

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
                  xmlns:mozc="http://schemas.android.com/apk/res-auto">
    <PreferenceCategory android:title="@string/pref_cat_1">
        <CheckBoxPreference
            android:defaultValue="false"
            android:key="pref_key_1"
            android:title="@string/pref_title1" />

        <PreferenceCategory android:title="@string/pref_cat_1_1">

            <Preference
                android:key="pref_key_2"
                android:persistent="false"
                android:title="@string/pref_title2">
            </Preference>
        </PreferenceCategory>
    </PreferenceCategory>

    <PreferenceCategory android:title="@string/pref_cat_2">
        <CheckBoxPreference
            android:defaultValue="true"
            android:key="pref_key_3"
            android:title="@string/pref_title3" />
    </PreferenceCategory>
</PreferenceScreen>

The output will be as follows.

pref_key_1
pref_key_2
pref_key_3

reference

I wrote it because there was nothing in particular.

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