云信 NIM SDK 支持配置多端推送策略，即当桌面端（包括 Windows，Web，macOS 等）在线时，SDK 支持设置是否需要推送给移动端。若移动端处于离线，则离线推送通知用户；若处于在线，则在线提醒用户。

前提条件

已实现第三方离线推送或在线提醒。

实现方法

1. 通过调用 addSettingListener 方法注册系统设置事件观察者，监听多端推送/提醒配置的更新。

   示例代码如下：

   Android

   JavaNIMClient.getService(V2NIMSettingService.class).addSettingListener(new V2NIMSettingListener() {
       @Override
       public void onTeamMessageMuteModeChanged(String teamId, V2NIMTeamType teamType, V2NIMTeamMessageMuteMode muteMode) {
   
       }
   
       @Override
       public void onP2PMessageMuteModeChanged(String accountId, V2NIMP2PMessageMuteMode muteMode) {
   
       }
   });
   

   iOS

   Objective-C[[[NIMSDK sharedSDK] v2SettingService] addSettingListener:self];
   

   Windows/macOS

   c++V2NIMTeamListener listener;
   listener.onTeamMessageMuteModeChanged = [](std::string teamId, V2NIMTeamType teamType, V2NIMTeamMessageMuteMode muteMode) {
       // handle team message mute mode changed
   };
   listener.onP2PMessageMuteModeChanged = [](std::string accountId, V2NIMP2PMessageMuteMode muteMode) {
       // handle p2p message mute mode changed
   };
   settingService.addSettingListener(listener);    
   

   Web/uni-app/小程序

   TypeScriptnim.V2NIMSettingService.on("onTeamMessageMuteModeChanged", function (teamId: string, teamType: V2NIMTeamType, muteMode: V2NIMTeamMessageMuteMode)
   nim.V2NIMSettingService.on("onP2PMessageMuteModeChanged", function (accountId: string, muteMode: V2NIMP2PMessageMuteMode)
   

   HarmonyOS

   TypeScriptnim.settingService.on('onTeamMessageMuteModeChanged', (teamId: string, teamType: V2NIMTeamType, muteMode: V2NIMTeamMessageMuteMode) => {})
   nim.settingService.on('onP2PMessageMuteModeChanged', (accountId: string, muteMode: V2NIMP2PMessageMuteMode) => {})
   

2. 通过调用 setPushMobileOnDesktopOnline 方法来设置当桌面端在线时，是否需要推送给移动端。

   入参 need 为 true 表示桌面端在线时移动端需要推送。

   示例代码如下：

   Android

   JavaNIMClient.getService(V2NIMSettingService.class).setPushMobileOnDesktopOnline(needPushMobileOnDesktopOnline,
   new V2NIMSuccessCallback<Void>() {
       @Override
       public void onSuccess(Void unused) {
   
       }
   },
   new V2NIMFailureCallback() {
       @Override
       public void onFailure(V2NIMError error) {
   
       }
   });
   

   iOS

   Objective-C[[[NIMSDK sharedSDK] v2SettingService] setPushMobileOnDesktopOnline:YES success:^{
       // 成功回调
   } failure:^(V2NIMError * _Nonnull error) {
       // 失败回调
   }];
   

   Windows/macOS

   c++settingService.setPushMobileOnDesktopOnline(
       true,
       []() {
           // set push mobile on desktop online succeeded
       },
       [](V2NIMError error) {
           // set push mobile on desktop online failed, handle error
       });
   

   Web/uni-app/小程序

   TypeScriptnim.V2NIMSettingService.setPushMobileOnDesktopOnline(true)
   

   HarmonyOS

   TypeScriptawait nim.settingService.setPushMobileOnDesktopOnline(true)