android - 具有 false persistent 的 EditTextPreference 不会调用 onSharedPreferenceChanged

Question

我有这个 EditTextPreference

<EditTextPreference
        android:title="@string/settings_server"
        android:summary="@string/server_name_message"
        android:persistent="false"
        android:key="SERVER_NAME" />

但是对于 persistent="false"，它不会调用 onSharedPreferenceChanged 方法。我怎样才能检测到这个事件保持 android:persistent="false"

Answer 1

您必须在 PreferenceActivity 或 PreferenceFragment 的代码中附加自定义监听器:

EditTextPreference prefServerName = (EditTextPreference) findPreference("SERVER_NAME");

prefServerName.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
    @Override
    public boolean onPreferenceChange(Preference preference, Object newValue) {
        String value = (String) newValue;

        // do what you need

        return true; // indicates you processed the new value
    }
});