WEBVTT 00:00.080 --> 00:02.320 Welcome back up in the main activity. 00:02.320 --> 00:09.240 And let's call the screen detection screen and pass the ViewModel to it. 00:09.240 --> 00:18.240 So here inside the main activity set content we need to call the detection screen object detection screen 00:18.280 --> 00:18.560 okay. 00:18.600 --> 00:26.080 Because this is the composable named as object detection screen, we need to pass uh, one optional 00:26.080 --> 00:31.080 and a second mandatory parameter which is the ViewModel. 00:31.080 --> 00:39.800 So here I need to pass one mandatory ViewModel parameter to create the ViewModel in Jetpack Compose. 00:39.840 --> 00:49.840 The best way is to specify a hilt aware method for creating the hilt ViewModel, and this is done by 00:49.840 --> 00:58.000 using the hilt ViewModel that it is from hilt dot navigation dot compose package. 00:58.240 --> 01:00.280 Let me go to the Build.gradle. 01:00.320 --> 01:01.800 This is the safest. 01:02.160 --> 01:11.840 This is the safest way to create a ViewModel in Jetpack Compose using hilt, go to Build.gradle file 01:12.020 --> 01:18.780 and here use the implementation of Android exhale dot navigation. 01:18.780 --> 01:24.740 Compose sync the project and go back to the main activity Alt+. 01:24.740 --> 01:27.860 Enter to import this health ViewModel. 01:28.020 --> 01:28.460 Again. 01:28.460 --> 01:35.460 Guys, this health ViewModel is from Compose Navigation Health Android X okay, now we need to pass 01:35.460 --> 01:36.540 this ViewModel. 01:36.540 --> 01:37.940 So pass it here. 01:38.140 --> 01:47.100 This is not the modifier, this is the view model okay, move the those outside the set content because 01:47.100 --> 01:48.580 it's a single thread. 01:48.580 --> 01:49.780 And here we go. 01:49.820 --> 01:56.340 This is how we create the ViewModel and pass it to the object detection screen. 01:56.340 --> 01:59.940 Let me run actually we have a crash here. 02:00.220 --> 02:01.180 We have an error. 02:01.180 --> 02:02.100 Scroll up. 02:02.140 --> 02:08.580 And here the exception can't create an instance of ViewModel. 02:08.580 --> 02:14.380 So uh, the main problem here is the dependency injection of the ViewModel. 02:14.380 --> 02:16.820 So we have inside the ViewModel. 02:16.820 --> 02:18.500 Let me go to the ViewModel. 02:18.500 --> 02:22.420 We have the hilt ViewModel and notation here. 02:22.580 --> 02:29.280 And here it's not favorable to use the context directly like this. 02:29.480 --> 02:35.960 We need to replace it with, uh, application or other dependencies. 02:36.040 --> 02:43.400 So this is the main problem of our of our application because we are injecting the application context 02:43.400 --> 02:44.240 in the ViewModel. 02:44.240 --> 02:48.280 And this is not allowed in Viewmodels. 02:48.280 --> 02:53.280 We use the context to get the, uh, to open the assets. 02:53.280 --> 02:57.680 So instead of it we can use the application. 02:58.000 --> 02:59.880 So we can write like this. 02:59.880 --> 03:10.960 The application import the class and use Android View model and pass the application as its parameter. 03:10.960 --> 03:13.360 So here it's working fine. 03:13.360 --> 03:22.240 And instead of using the context we're gonna use the get application and access the assets dot open 03:22.240 --> 03:22.880 folder. 03:23.120 --> 03:27.200 Let me scroll down here to the context here. 03:27.240 --> 03:30.440 Paste it and open the file here. 03:30.440 --> 03:31.760 Not open the folder. 03:31.800 --> 03:34.000 It's open file okay. 03:34.420 --> 03:38.260 So again guys we get rid of the context. 03:38.300 --> 03:44.020 We replace it with get application and get application from this side. 03:44.020 --> 03:50.620 And we replace the context in the constructor with the application. 03:50.620 --> 03:58.220 So always use this pattern when you have Android ViewModel and you want to access the application folders 03:58.380 --> 04:03.900 in in Jetpack Compose, let me run the application again and here we go. 04:03.940 --> 04:06.460 This is our lovely application. 04:06.620 --> 04:11.900 Let me grant the the camera permissions while using the app. 04:12.180 --> 04:14.500 And the camera started. 04:14.740 --> 04:16.980 And congratulations guys. 04:17.260 --> 04:21.980 This is the this is our application. 04:22.140 --> 04:25.060 We are detecting screens. 04:25.380 --> 04:27.460 We are detecting keyboard. 04:27.620 --> 04:30.020 We are detecting a mouse. 04:30.060 --> 04:31.700 Let me see or book. 04:32.020 --> 04:34.980 It's not testing it directly. 04:34.980 --> 04:35.740 Book. 04:35.780 --> 04:37.340 Let me see the pencil. 04:37.540 --> 04:38.140 You see. 04:38.180 --> 04:38.700 Oops. 04:38.740 --> 04:40.220 It's not the refrigerator.