android - 在 PreferenceScreen 的首选项中添加一个 TextView

Question

在此首选项屏幕中，用户取消设备与其帐户的链接。目前我只是将它作为取消链接设备，一旦用户点击它，就会发生取消链接。

但我想添加一段这样的文字:

Joe Foo 的设备 (joefoo@gmail.com) - 取消链接设备

我会这样做吗？我还需要从 settingsActivity 动态添加用户名。

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >

     <Preference android:title="@string/pref_title_advanced_unlink" >
         <TextView somehow must be in here
            android:id="@id/user_name_and_email" />

         <intent android:action="android.intent.action.VIEW"
            android:targetPackage="com.example.tvrplayer"
            android:targetClass="com.example.tvrplayer.UnlinkActivity" 
            android.setflags="FLAG_ACTIVITY_CLEAR_TOP"/>
    </Preference>

</PreferenceScreen>

Answer 1

preferences.xml

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
    <PreferenceCategory
        android:key="pref_title_advanced"
        android:title="Advanced" >
        <CheckBoxPreference
            android:defaultValue="false"
            android:key="pref_title_advanced_link"
            android:title="Link Device" />
    </PreferenceCategory>
</PreferenceScreen>

PrefsActivity.java

private SharedPreferences mPreferences;
private SharedPreferences.OnSharedPreferenceChangeListener mPrefListener;
private CheckBoxPreference mCheckBoxPref;

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

    mCheckBoxPref = (CheckBoxPreference) getPreferenceScreen().findPreference(
            "pref_title_advanced_link");
    /*
     * set initial summary as you desire. For example, userIdCurrent can be:
     * "No Devices linked."
     */
    mCheckBoxPref.setSummary(userIdCurrent);

    mPrefListener = new SharedPreferences.OnSharedPreferenceChangeListener() {
        public void onSharedPreferenceChanged(SharedPreferences prefs,
                String key) {
            if (key.equals("pref_title_advanced_link")) {
                /*
                 * set post-click summary as you desire. For example,
                 * userIdPost can be:
                 * "Joe Foo's Device (joefoo@gmail.com)".
                 */
                mCheckBoxPref.setSummary(userIdPost);
            }
        }
    };
    mPreferences.registerOnSharedPreferenceChangeListener(mPrefListener);
}