How to set up permission of the APPs under Android M?
According to the mechanism of Android M, default permission setting of Apps is disable when it's undergoing the installation process , and system will not require user to activate the related permission.(e.g. Camara, Contacts..)
Therefore, a window would pop-up to require the permission while using some related function after you installed the app. For example, permission windows pop up while opening the camera and taking photo. You need to tap " Grant Permission " to allow device such as camera / microphone to activate its function.
How to check the permission status of APPs?
1. Tap " Settings " > " Apps "
2. Choose the App information. For example " Camera " and tap " Permissions "
3. From the permission list, you can slide to turn on/off the permission of the function which is related to camera.