*.On your Android device,
Go to Play Store then download and install the app called Cameraless.
*.Once installed,
launch the app from your app drawer.
*.On the app’s main menu, tap the option for “Camera Manager On/Off”. By default,the camera manager is set to “Off” so you need to enable the app first as one of your device administrators before you can switch it “On”.
*.Once your camera manager is “On”, just tap the option for “Disable camera” then wait until the notice disappears on your screen.
*.Once you’re done, just close the app then go to your device camera.
Tap on your phone or tablet’s camera icon.
*.If successfully disabled, you’ll immediately get a notice that your device camera has been disabled due to security policy violations.
This is the notice that you’ll get from the Cameraless app.
If you click “OK”, you’ll be taken back to your home screen.
The same thing will happen if you attempt to access your device camera using a third-party app with camera support (e.g., Instagram, Pixlr Express, etc.).
You will still get the same message so the only way for you to bring your camera app back to normal is to reactivate it using the Cameraless application.
To do so,
Just go back to the app’s main menu and instead of selecting the option “Disable camera”, just tap the option for “Enable camera” and
that’s it. You’re done.
Note: This method will be automatically applied regardless if your device is only equipped with a rear cameraor a front camera or both.
If your camera is disabled, you also won’t be able to use your device’s “capture screenshot” function.
Link: Cameraless
https://play.google.com/store/apps/detai...eradisable&hl=en
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