android 多用户 图库,Android9.x多用户机制#Profile user 桌面图标显示过程

Profile User用户创建成功后，只会在桌面显示寥寥几个应用的图标，而不是所有系统应用；在原生的系统上，profile user创建成功后，会在桌面显示两个profile user应用的图标

场景一：Profile User初次创建成功后，桌面图标显示##

以下以电子邮件应用为例，看下创建Profile user用户后，桌面图标显示的场景

Profile_user_icon

以下调用栈，表示，在Profile User启动后，该应用监听监听了ACTION_BOOT_COMPLETED广播，然后调用setComponentEnabledSetting去启用某些组件

调用栈信息

03-07 07:21:06.626 4982 5168 D user : java.lang.Throwable

03-07 07:21:06.626 4982 5168 D user : at android.app.ApplicationPackageManager.setComponentEnabledSetting(ApplicationPackageManager.java:2326)

03-07 07:21:06.626 4982 5168 D user : at com.android.email.service.EmailServiceUtils.setComponentStatus(EmailServiceUtils.java:793)

03-07 07:21:06.626 4982 5168 D user : at com.android.email.service.EmailServiceUtils.enableExchangeComponent(EmailServiceUtils.java:812)

03-07 07:21:06.626 4982 5168 D user : at com.android.email.provider.AccountReconciler.reconcileAccountsInternal(AccountReconciler.java:211)

03-07 07:21:06.626 4982 5168 D user : at com.android.email.provider.AccountReconciler.reconcileAccounts(AccountReconciler.java:146)

03-07 07:21:06.626 4982 5168 D user : at com.android.email.service.EmailBroadcastProcessorService.reconcileAndStartServices(EmailBroadcastProcessorService.java:371)

03-07 07:21:06.626 4982 5168 D user : at com.android.email.service.EmailBroadcastProcessorService.onBootCompleted(EmailBroadcastProcessorService.java:352)

03-07 07:21:06.626 4982 5168 D user : at com.android.email.service.EmailBroadcastProcessorService.onHandleIntent(EmailBroadcastProcessorService.java:159)

03-07 07:21:06.626 4982 5168 D user : at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:76)

03-07 07:21:06.626 4982 5168 D user : at android.os.Handler.dispatchMessage(Handler.java:106)

03-07 07:21:06.626 4982 5168 D user : at android.os.Looper.loop(Looper.java:193)

03-07 07:21:06.626 4982 5168 D user : at android.os.HandlerThread.run(HandlerThread.java:65)

enableExchangeComponent

public static void enableExchangeComponent(final Context context) {

if (VendorPolicyLoader.getInstance(context).useAlternateExchangeStrings()) {

LogUtils.d(LogUtils.TAG, "Enabling alternate EAS authenticator");

setComponentStatus(context, EasAuthenticatorServiceAlternate.class, true);

setComponentStatus(context, EasAuthenticatorService.class, false);

} else {

LogUtils.d(LogUtils.TAG, "Enabling EAS authenticator");

setComponentStatus(context, EasAuthenticatorService.class, true);

setComponentStatus(context,

EasAuthenticatorServiceAlternate.class, false);

}

}

@Override

public void setComponentEnabledSetting(ComponentName componentName,int newState, int flags) {

try {

mPM.setComponentEnabledSetting(componentName, newState, flags, mContext.getUserId());//传递当前应用进程所在的userid，到pms

} catch (RemoteException e) {

throw e.rethrowFromSystemServer();

}

}

从广播发送到桌面去更新桌面图标的流程如下：

禁用或者使能组件流程

流程描述如下：

Profile User创建成功后，发送ACTION_BOOT_COMPLETED广播

电子邮件应用，接收ACTION_BOOT_COMPLETED广播，调用PMS#setComponentEnabledSetting去使能相关组件服务

PMS处理相关逻辑，使能相关组件服务后，发送ACTION_PACKAGE_CHANGED广播，回调IOnAppsChangeListener的onPacakgeChange方法

因为桌面注册了IOnAppsChangeListener监听，因此能够监听到改pacakgeChange变化，更新对应用户的桌面图标变化

桌面使用的注册监听的接口

LauncherApps.java

public void registerCallback(Callback callback, Handler handler) {

synchronized (this) {

if (callback != null && findCallbackLocked(callback) < 0) {

boolean addedFirstCallback = mCallbacks.size() == 0;

addCallbackLocked(callback, handler);

if (addedFirstCallback) {

try {

mService.addOnAppsChangedListener(mContext.getPackageName(),

mAppsChangedListener);

} catch (RemoteException re) {

throw re.rethrowFromSystemServer();

}

}

}

}

}