Cordova not open camera(for scan qr)

im triying to open the camera for scan qr for my app, and when I install the apk on android, the camera does not open. I have the permissions enabled in the Android.manifest.xml

 <uses-permission android:name="android.permission.CAMERA" />    
<uses-permission android:name="android.permission.MICROPHONE" />    
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />    
<uses-permission android:name="android.permission.RECORD_AUDIO" />    
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.RECORD_VIDEO" />