setting-在设置中添加新的选项

如下图的“通知栏调出方式”

具体实现如下

1.在

res/xml/settings_headers.xml

文件中添加如下内容

<preference-headers
        xmlns:android="http://schemas.android.com/apk/res/android">
    <header
        android:id="@+id/quick_pulldown"
        android:fragment="com.android.settings.QuickPullDown"
        android:title="@string/quick_pulldown"
        android:icon="@drawable/ic_quick_pulldown" />
</preference-headers>

 2.关联的fragment类如下

public class QuickPullDown extends SettingsPreferenceFragment implements
        OnPreferenceClickListener {

    private Context mContext;

    private AudioProfilePreference mOffPressPref;
    private AudioProfilePreference mRightPressPref;
    private AudioProfilePreference mLeftPressPref;
    private static final int QS_QUICK_PULLDOWN_DEFAULT_VALUE = 0;
    private static final String OFF = "off";
    private static final String RIGHT = "right";
    private static final String LEFT = "left";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mContext = getActivity();
        addPreferencesFromResource(R.xml.quick_pulldown);

        mOffPressPref = (AudioProfilePreference) findPreference(OFF);
        mRightPressPref = (AudioProfilePreference) findPreference(RIGHT);
        mLeftPressPref = (AudioProfilePreference) findPreference(LEFT);
        mOffPressPref.isShowDetailsView = false;
        mRightPressPref.isShowDetailsView = false;
        mLeftPressPref.isShowDetailsView = false;
        mOffPressPref.setOnPreferenceClickListener(this);
        mRightPressPref.setOnPreferenceClickListener(this);
        mLeftPressPref.setOnPreferenceClickListener(this);
        refreshPressState();
    }


@Override
    public void onResume() {
        super.onResume();
        getListView().setDivider(null);
        getListView().setBackgroundResource(R.drawable.funui_background);
        getListView().setSelector(android.R.color.transparent);
        new BackgroundChooser().justDoIt(getPreferenceScreen());
    }

    @Override
    public boolean onPreferenceClick(Preference preference) {
        if (preference instanceof AudioProfilePreference) {
             if (preference == mOffPressPref) {
                Settings.System.putInt(mContext.getContentResolver(), QS_QUICK_PULLDOWN, 0);
             } else if (preference == mRightPressPref) {
                Settings.System.putInt(mContext.getContentResolver(), QS_QUICK_PULLDOWN, 1);
             } else if (preference == mLeftPressPref) {
                Settings.System.putInt(mContext.getContentResolver(), QS_QUICK_PULLDOWN, 2);
             }
             refreshPressState();
        }
        return true;
    }

    public void refreshPressState() {
        int value = Settings.System.getInt(
                        getContentResolver(), QS_QUICK_PULLDOWN, QS_QUICK_PULLDOWN_DEFAULT_VALUE);

        mOffPressPref.setRadioButtonClickable(false);
        mRightPressPref.setRadioButtonClickable(false);
        mLeftPressPref.setRadioButtonClickable(false);
        switch (value) {
            case 0:
                mOffPressPref.setChecked();
                break;
            case 1:
                mRightPressPref.setChecked();
                break;
            case 2:
                mLeftPressPref.setChecked();
                break;
            default:
               break;
        }
    }
}

3.这个类中用到的布局文件如下

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">

    <com.android.settings.FunuiPreferenceCategory
        android:key="quick_pulldown_setting"
        android:persistent="false"
        android:title="@string/quick_pulldown">

    <com.mediatek.audioprofile.AudioProfilePreference
        android:key="off"
        android:layout="@layout/funui_switch_preference_full"
        android:title="@string/quick_pulldown_off"
        android:summary="@string/quick_pulldown_off_describe"/>

    <com.mediatek.audioprofile.AudioProfilePreference
        android:key="right"
        android:layout="@layout/funui_switch_preference_full"
        android:title="@string/quick_pulldown_right"
        android:summary="@string/quick_pulldown_right_describe"/>

    <com.mediatek.audioprofile.AudioProfilePreference
        android:key="left"
        android:layout="@layout/funui_switch_preference_full"
        android:title="@string/quick_pulldown_left"
        android:summary="@string/quick_pulldown_left_describe"/>
    </com.android.settings.FunuiPreferenceCategory>

</PreferenceScreen>

这些其实就是setting这个模块的基本实现框架了

如何设定它的显示跟隐藏呢，主要是在这个 

src/com/android/settings/Settings.java

类中实现的，代码如下

public void updateHeaderList(List<Header> target) {

  if (id == R.id.quick_pulldown) {
         target.remove(header);
  }  
}