Android permission

1. <permission>

this is the permission other should acquire before using this app

<permission
        android:name="course.labs.permissions.DANGEROUS_ACTIVITY_PERM"
        android:label="my_permission"
        android:protectionLevel="normal" >
</permission>

2. <user-permission>

this is the permission an app should acquire before using another app or system funtion like read phone contact.

<uses-permission android:name="course.labs.permissions.DANGEROUS_ACTIVITY_PERM" />

3. system permission

android.permission.CALL_EMERGENCY_NUMBERS 
android.permission.READ_OWNER_DATA 
android.permission.SET_WALLPAPER 
android.permission.DEVICE_POWER