Android 每个设置的 OnPreferenceChangeListener
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OnPreferenceChangeListener for every setting
提问by Macarse
I know that I can do something like this:
我知道我可以做这样的事情：
Preference pref = findPreference(getString(R.string.pref_vibrate_on_key));
pref.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
@Override
public boolean onPreferenceChange(Preference preference,
Object newValue) {
LogUtil.d("Working!");
return true;
}
});
But I would like to add a Listener to every preference. I tried doing:
但我想为每个偏好添加一个监听器。我试着做：
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);
sp.registerOnSharedPreferenceChangeListener(new OnSharedPreferenceChangeListener() {
@Override
public void onSharedPreferenceChanged(
SharedPreferences sharedPreferences, String key) {
LogUtil.d("working!");
}
});
but it doesn't work. Is this possible? If so, what am I doing wrong?
但它不起作用。这可能吗？如果是这样，我做错了什么？
回答by bugfixr
Assuming you want the same listener called each time, this might be a simpler solution:
假设您希望每次都调用相同的侦听器，这可能是一个更简单的解决方案：
Preference.OnPreferenceChangeListener changeListener = new Preference.OnPreferenceChangeListener() {
public boolean onPreferenceChange(Preference preference, Object newValue) {
// Code goes here
return true;
}
};
EditTextPreference pref = (EditTextPreference)findPreference(getString(R.string.pref1));
pref1.setOnPreferenceChangeListener(changeListener);
EditTextPreference pref2 = (EditTextPreference)findPreference(getString(R.string.pref2));
pref2.setOnPreferenceChangeListener(changeListener);
回答by skyman
I think that onSharedPrefererenceChangedis fired upon saving the preference (when you click BACK or HOME in PreferenceActivity). I think that the easiest way is to create single class implementing OnPreferenceChangeListenerand switch through Preference.getKey();and set it as OnPreferenceChangeListenerfor each Preference.
我认为这onSharedPrefererenceChanged是在保存首选项时触发的（当您在 中单击 BACK 或 HOME 时PreferenceActivity）。我认为最简单的方法是创建单个类实现OnPreferenceChangeListener并切换Preference.getKey();并将其设置OnPreferenceChangeListener为每个首选项。
