ADB command to toggle camera modes in android device

Question

I am trying to figure out what is the command to load the camera app in different modes like following:

1. Toggle between camera and video cam corder mode
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Answer 1

You can use following though:

Intent action = new Intent("android.media.action.IMAGE_CAPTURE");  
        action.putExtra("android.intent.extras.CAMERA_FACING", 1);

You can use adb command "am start" . Please read following: How to run a specific Android app using Terminal?