如何编程修改的CheckBox preference视图 [英] how to programatically modify a CheckBoxPreference view

问题描述

我怎样才能更改CheckBox preference在运行时的看法？

How can I change the view of a CheckBoxPreference at runtime?

具体来说，我想这取决于用户是否已选中该复选框或不更改CheckBox preference总结。

Specifically, I'd like to change a CheckBoxPreference summary depending on whether the user has checked the box or not.

如果它是一个普通视图，我可以这样做：

If it were a normal view, I could do something like:

view1 = (TextView)findViewById(R.id.idView1);
view1.setText("some text");

但是，一个CheckBox preference没有身份证，所以我不知道怎么去处理给它。

But a CheckBoxPreference has no id, so I don't know how to get a "handle" to it.

推荐答案

我有一个答案，以我自己的问题。关键是要使用找到preference 在 preferenceActivity ，如下：

I have an answer to my own question. The key is to use findPreference in a PreferenceActivity, as follows:

public class MyPreferenceActivity extends PreferenceActivity{

    private SharedPreferences preferences;
    private SharedPreferences.OnSharedPreferenceChangeListener prefListener;
    private CheckBoxPreference pref;

    @Override    
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.preferences);

        pref = (CheckBoxPreference) findPreference(res.getString(R.string.keyAccount));
        pref.setSummary("something");

        //-- preference change listener
        prefListener = new SharedPreferences.OnSharedPreferenceChangeListener(){
             public void onSharedPreferenceChanged(SharedPreferences prefs, String key){  
                 if (key.equals(somekey)){                                       
                     pref.setSummary("something new");

                 }
             }
        };
        preferences.registerOnSharedPreferenceChangeListener(prefListener);     
    }

这是测试和工程。

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