下拉状态栏

代码路径 frameworks/base/packages/SystemUI/

数据开关图片：

quick_operation_mobile_data_on.png & quick_operation_mobile_data_off.png

res/layout/quick_operation_mobile_net_view.xml -> res/layout/status_bar_toggle.xml <include android:id="@+id/quick_operation_mobile_net" ... />

src/com/android/systemui/statusbar/ToggleListener.java

case R.id.quick_operation_mobile_net:

toggleDataNetwork();

mConnManager.setMobileDataEnabled

ConnectivityService.java setMobileDataEnabledByPhoneId

Settings.Secure.putIntAtIndex(mContext.getContentResolver(), Settings.Secure.MOBILE_DATA, phoneId, enabled? 1:0);

 

ScrollLayout ToggleListener mMobileDataObserver onChange

是查看Settings.Secure.MOBILE_DATA这个URI下的值是否改变。