小编Pra*_*ima的帖子

我是 flutter 新手，我只是想将 firebase 推送通知接收到我的 flutter 应用程序。当应用程序关闭并在后台时，会收到推送通知。但是当应用程序打开时，正在接收推送通知，但它没有显示警报通知（我想在我的应用程序打开时将推送通知标题和正文显示为警报）。这是我的代码。

_fcm.configure(
      onMessage: (Map<String, dynamic> message) async {
        showDialog(
          context: context,
          builder: (context) => AlertDialog(
            content: ListTile(
              title: Text(message['notification']['title']),
              subtitle: Text(message['notification']['body']),
            ),
            actions: <Widget>[
              FlatButton(
                child: Text('Ok'),
                onPressed: () => Navigator.of(context).pop(),
              ),
            ],
          ),
        );
        print("onMessage: $message");
      },
      onLaunch: (Map<String, dynamic> message) async {
        print("onLaunch: $message");
        
      },
      onResume: (Map<String, dynamic> message) async {
        print("onResume: $message");
      },
    );

有人可以帮我解决这个问题吗？

当我尝试在 Android 上构建我的离子移动应用程序时，出现以下错误。

An error occurred during the build:\nError: The target entry-point "@ionic-native/media-capture" has missing dependencies:\n - @ionic-native/core\n\n    at TargetedEntryPointFinder.findEntryPoints (/Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/@angular/compiler-cli/ngcc/src/entry_point_finder/targeted_entry_point_finder.js:40:23)\n    at /Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/@angular/compiler-cli/ngcc/src/execution/analyze_entry_points.js:28:41\n    at SingleProcessExecutorSync.SingleProcessorExecutorBase.doExecute (/Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/@angular/compiler-cli/ngcc/src/execution/single_process_executor.js:28:29)\n    at /Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/@angular/compiler-cli/ngcc/src/execution/single_process_executor.js:57:59\n    at SyncLocker.lock (/Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/@angular/compiler-cli/ngcc/src/locking/sync_locker.js:34:24)\n    at SingleProcessExecutorSync.execute (/Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/@angular/compiler-cli/ngcc/src/execution/single_process_executor.js:57:27)\n    at Object.mainNgcc (/Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/@angular/compiler-cli/ngcc/src/main.js:74:25)\n    at Object.process (/Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/@angular/compiler-cli/ngcc/index.js:29:23)\n    at NgccProcessor.processModule (/Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/@ngtools/webpack/src/ngcc_processor.js:163:16)\n    at /Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/@ngtools/webpack/src/ivy/host.js:55:18\n    at /Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/@ngtools/webpack/src/ivy/host.js:47:24\n    at Array.map (<anonymous>)\n    at Object.host.resolveModuleNames (/Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/@ngtools/webpack/src/ivy/host.js:45:32)\n    at actualResolveModuleNamesWorker (/Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/typescript/lib/typescript.js:102904:133)\n    at resolveModuleNamesWorker (/Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/typescript/lib/typescript.js:103126:26)\n    at resolveModuleNamesReusingOldState (/Users/prabhashibuddhima/Documents/Personal/Projects/VRec/myVideo/node_modules/typescript/lib/typescript.js:103200:24)\nAn unhandled exception occurred: The target entry-point "@ionic-native/media-capture" has missing dependencies:\n - @ionic-native/core\n\nSee "/private/var/folders/vp/8s5chkws6tx5v3wjyvr7n_qm0000gn/T/ng-HBL1kz/angular-errors.log" for further details.\n